Related Vulnerabilities: CVE-2010-0576

A device running Cisco IOS® Software, Cisco IOS XE Software, or Cisco IOS XR Software is vulnerable to a remote denial of service (DoS) condition if it is configured for Multiprotocol Label Switching (MPLS) and has support for Label Distribution Protocol (LDP). A crafted LDP UDP packet can cause an affected device running Cisco IOS Software or Cisco IOS XE Software to reload. On devices running affected versions of Cisco IOS XR Software, such packets can cause the device to restart the mpls_ldp process. A system is vulnerable if configured with either LDP or Tag Distribution Protocol (TDP). Cisco has released software updates that address this vulnerability. Workarounds that mitigate this vulnerability are available. This advisory is posted at http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20100324-ldp. Note: The March 24, 2010, Cisco IOS Software Security Advisory bundled publication includes seven Security Advisories. All the advisories address vulnerabilities in Cisco IOS Software. Each advisory lists the releases that correct the vulnerability or vulnerabilities detailed in the advisory. The table at this URL lists releases that correct all Cisco IOS Software vulnerabilities that have been published on March 24, 2010, or earlier: http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20100324-bundle Individual publication links are in "Cisco Event Response: Semiannual Cisco IOS Software Security Advisory Bundled Publication" at this link: http://www.cisco.com/web/about/security/intelligence/Cisco_ERP_mar10.html

Source

Summary

A device running Cisco IOS^® Software, Cisco IOS XE Software, or Cisco IOS XR Software is vulnerable to a remote denial of service (DoS) condition if it is configured for Multiprotocol Label Switching (MPLS) and has support for Label Distribution Protocol (LDP).

A crafted LDP UDP packet can cause an affected device running Cisco IOS Software or Cisco IOS XE Software to reload. On devices running affected versions of Cisco IOS XR Software, such packets can cause the device to restart the mpls_ldp process.

A system is vulnerable if configured with either LDP or Tag Distribution Protocol (TDP).

Cisco has released software updates that address this vulnerability.

Workarounds that mitigate this vulnerability are available.

This advisory is posted at http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20100324-ldp.

Note: The March 24, 2010, Cisco IOS Software Security Advisory bundled publication includes seven Security Advisories. All the advisories address vulnerabilities in Cisco IOS Software. Each advisory lists the releases that correct the vulnerability or vulnerabilities detailed in the advisory. The table at this URL lists releases that correct all Cisco IOS Software vulnerabilities that have been published on March 24, 2010, or earlier:

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20100324-bundle

Individual publication links are in "Cisco Event Response: Semiannual Cisco IOS Software Security Advisory Bundled Publication" at this link:

http://www.cisco.com/web/about/security/intelligence/Cisco_ERP_mar10.html

Affected Products

Cisco IOS Software, Cisco IOS XE Software, and Cisco IOS XR Software devices are vulnerable if they are configured to listen for either targeted LDP hello messages or link LDP hello messages.

All versions of Cisco IOS Software and Cisco IOS XE Software that support MPLS are affected. Cisco IOS XR Software is affected in releases prior to 3.5.2.
Vulnerable Products
Several features within Cisco IOS Software, Cisco IOS XE Software, and Cisco IOS XR Software require the device to listen for either targeted LDP hello messages or link LDP hello messages. The most reliable way to determine if the device is configured to listen to LDP hello messages, is to log into the device and perform these actions:

Confirm whether MPLS forwarding is enabled.
A device that has MPLS forwarding disabled, is not vulnerable.

Cisco IOS Software and Cisco IOS XE Software

MPLS forwarding is enabled by default in Cisco IOS Software and Cisco IOS XE Software via the CLI command mpls ip. A device that has MPLS forwarding disabled, will have the global configuration command no mpls ip in the configuration. For Cisco IOS Software, the output of show mpls interface will show whether the device has it disabled. This example shows a Cisco IOS Software device that has MPLS forwarding disabled:

Router#show mpls interface IP MPLS forwarding is globally disabled on this router. Individual interface configuration is as follows: Interface IP Tunnel Operational Router#

For Cisco IOS XE Software, examine the output of show running-config and confirm the existence of the global command no mpls, to ensure that the device will not process LDP hello messages. This example shows a Cisco IOS XE Software device that has MPLS forwarding disabled:

Router#show running-config | include mpls no mpls ip Router#

Cisco IOS XR Software

MPLS forwarding is disabled by default in Cisco IOS XR Software.

A device that has MPLS forwarding enabled, will have the global configuration command mpls ldp in the configuration. This example shows a Cisco IOS XR Software device that has MPLS forwarding enabled:

RP/0/0/CPU0:Router-XR#show running-config mpls mpls ldp ! RP/0/0/CPU0:Router-XR#

This example shows a Cisco IOS XR Software device with MPLS forwarding disabled:

RP/0/0/CPU0:Router-XR#show running-config mpls % No such configuration item(s) RP/0/0/CPU0:Router-XR#

If MPLS is disabled the device is not vulnerable and there is no requirement to perform the next step.

Confirm whether the device is listening to LDP hello messages.
If a device is configured to listen to LDP hello messages, it is vulnerable.

Cisco IOS Software and Cisco IOS XE Software

To determine if a device is configured to listen for LDP hello messages, log into the device and issue either of the following command line interface (CLI) commands show ip socket, show udp or show control-plane host open-ports. If the output shows any IP addresses listening on port UDP 646, the device is vulnerable. This is an example of a device that is configured to listen for LDP hello messages (one example is shown from each of the above commands):

Router#show ip socket Proto Remote Port Local Port In Out Stat TTY OutputIF 17 --listen-- 192.168.0.1 67 0 0 1 0 17 --listen-- 192.168.0.1 68 0 0 1 0 17 --listen-- 192.168.0.1 711 0 0 1 0 17 --listen-- 192.168.0.1 646 0 0 1 0 17 --listen-- 192.168.0.1 3503 0 0 1 0 Router#

Router#show udp Proto Remote Port Local Port In Out Stat TTY OutputIF 17 --listen-- 192.168.0.1 123 0 0 1 0 17 --listen-- 192.168.0.1 711 0 0 1 0 17 --listen-- 192.168.0.1 646 0 0 1 0 17 --listen-- 192.168.0.1 3503 0 0 1 0 Router#

Router#show control-plane host open-ports Active internet connections (servers and established) Prot Local Address Foreign Address Service State tcp *:23 *:0 Telnet LISTEN udp *:123 *:0 NTP LISTEN udp *:646 *:0 LDP Hello LISTEN udp *:711 *:0 TDP Hello LISTEN Router#

Cisco IOS XR Software

To determine if a device is configured to listen for LDP hello messages, log in to the device and issue the show udp brief CLI command. If the output shows any IP address listening on port UDP 646, the device is vulnerable. This is an example of a device that is configured to listen for LDP hello messages:

RP/0/0/CPU0:Router-XR#show udp brief PCB Recv-Q Send-Q Local Address Foreign Address 0x482609e8 0 0 :::514 :::0 0x482605f0 0 0 0.0.0.0:514 0.0.0.0:0 0x48260720 0 0 0.0.0.0:646 0.0.0.0:0 RP/0/0/CPU0:Router-XR#

If the device is not listening on UDP port 646, it is not vulnerable. Devices that are configured to only use Resource Reservation Protocol (RSVP) or Border Gateway Protocol (BGP) to distribute labels or MPLS Static Labels are not vulnerable.

To determine the Cisco IOS Software release that is running on a Cisco product, administrators can log in to the device and issue the show version command to display the system banner. The system banner confirms that the device is running Cisco IOS Software by displaying text similar to "Cisco Internetwork Operating System Software" or "Cisco IOS Software." The image name displays in parentheses, followed by "Version" and the Cisco IOS Software release name. Other Cisco devices do not have the show version command or may provide different output.

This example identifies a Cisco product that is running Cisco IOS Software Release 12.3(26) with an installed image name of C2500-IS-L:

Router#show version Cisco Internetwork Operating System Software IOS (tm) 2500 Software (C2500-IS-L), Version 12.3(26), RELEASE SOFTWARE (fc2) Technical Support: http://www.cisco.com/techsupport Copyright ) 1986-2008 by cisco Systems, Inc. Compiled Mon 17-Mar-08 14:39 by dchih

This example shows a product that is running Cisco IOS Software release 12.4(20)T with an image name of C1841-ADVENTERPRISEK9-M:

Router#show version Cisco IOS Software, 1841 Software (C1841-ADVENTERPRISEK9-M), Version 12.4(20)T, RELEASE SOFTWARE (fc3) Technical Support: http://www.cisco.com/techsupport Copyright ) 1986-2008 by Cisco Systems, Inc. Compiled Thu 10-Jul-08 20:25 by prod_rel_team

Additional information about Cisco IOS Software release naming conventions is available in "White Paper: Cisco IOS Reference Guide" at this link: http://www.cisco.com/web/about/security/intelligence/ios-ref.html.
Products Confirmed Not Vulnerable
Cisco NX-OS Software is not affected.

Cisco IOS XR Software Releases 3.5.2 and later are not affected.

No other Cisco products are currently known to be affected by this vulnerability.

Details

MPLS LDP enables peer label switch routers (LSRs) in an MPLS network to exchange label binding information for supporting hop-by-hop forwarding in an MPLS network.

A vulnerability exists in Cisco IOS Software, Cisco IOS XE Software, and Cisco IOS XR Software when processing a specially crafted LDP packet. For the device to be vulnerable, it has to be configured to process LDP hello messages, as explained within the Affected Products section of this advisory.

The crafted LDP packet, can be received as either a unicast or multicast UDP packet on port UDP 646 on any listening IP address of the device. Transit traffic will not trigger this vulnerability.

Note: Devices configured with TDP will also process the crafted LDP packet and are vulnerable.

For further information regarding MPLS and LDP please consult the "Multiprotocol Label Switching (MPLS) Introduction" home page available at this link:

http://www.cisco.com/en/US/products/ps6557/products_ios_technology_home.html

This vulnerability is documented in the Cisco Bug ID CSCsz45567 ( registered customers only) for Cisco IOS Software and Cisco IOS XE Software, and CSCsj25893 ( registered customers only) for Cisco IOS XR Software. This vulnerability has been assigned Common Vulnerabilities and Exposures (CVE) ID CVE-2010-0576.

Workarounds

Users are advised to apply mitigation techniques to help limit exposure to the vulnerability. Mitigation consists of allowing only legitimate devices to connect to the device. To increase effectiveness, the mitigation must be coupled with anti-spoofing measures on the network edge. This action is required because LDP will use UDP as the hello transport protocol.

If LDP is not required on the device, then MPLS forwarding can be disabled with the global configuration command no mpls ip.

Note: LDP password or MD5 protection, does not protect against this vulnerability.

Transit traffic will not exploit this vulnerability. Only packets destined to the device may be used to exploit this vulnerability.

Additional mitigations that can be deployed on Cisco devices within the network are available in the companion document "Cisco Applied Mitigation Bulletin: Identifying and Mitigating Exploitation of the Cisco IOS Software Multiprotocol Label Switching Packet Vulnerability," which is available at this location: http://tools.cisco.com/security/center/content/CiscoAppliedMitigationBulletin/cisco-amb-20100324-ldp.

Infrastructure Access Control Lists

Warning: Because the feature in this vulnerability utilizes UDP as a transport, it is possible to spoof the sender's IP address, which may defeat access control lists (ACLs) that permit communication to these ports from trusted IP addresses. Unicast Reverse Path Forwarding (Unicast RPF) should also be considered, to offer a comprehensive solution.

Although it is often difficult to block traffic that transits a network, it is possible to identify traffic that should never be allowed to target infrastructure devices and block that traffic at the border of the network. Infrastructure ACLs (iACLs) are a network security best practice and should be considered as a long-term addition to good network security as well as a workaround for this specific vulnerability. This iACL example should be included as part of the deployed infrastructure access list, which will help protect all devices with IP addresses in the infrastructure IP address range:
```
 
 
!---
!--- Feature: Label Distribution Protocol (LDP)
!--- 
 
 
access-list 150 permit udp TRUSTED_SOURCE_ADDRESSES 
    WILDCARD INFRASTRUCTURE_ADDRESSES WILDCARD eq 646
 
 
access-list 150 permit udp TRUSTED_SOURCE_ADDRESSES 
    WILDCARD host 224.0.0.2 eq 646
 
 
!---
!--- Deny LDP traffic from all other sources destined
!--- to infrastructure addresses, including multicast
!--- and broadcast addresses.
!--- 
 
 
access-list 150 deny udp any 224.0.0.0 0.0.0.255 eq 646
access-list 150 deny udp any host 255.255.255.255 eq 646
access-list 150 deny udp any  
    INFRASTRUCTURE_ADDRESSES WILDCARD eq 646
 
 
!---
!--- Permit/deny all other Layer 3 and Layer 4 traffic in
!--- accordance with existing security policies and
!--- configurations.  Permit all other traffic to transit the
!--- device.
!--- 
 
 
access-list 150 permit ip any any
 
 
!---
!--- Apply access-list to all interfaces (only one example
!--- shown)
!--- 
 
 
interface fastEthernet 2/0
 ip access-group 150 in
```
The white paper entitled "Protecting Your Core: Infrastructure Protection Access Control Lists" presents guidelines and recommended deployment techniques for infrastructure protection access lists and is available at this link: http://www.cisco.com/en/US/tech/tk648/tk361/technologies_white_paper09186a00801a1a55.shtml

Control Plane Policing

Warning: Because the feature in this vulnerability utilizes UDP as a transport, it is possible to spoof the sender's IP address, which may defeat ACLs that permit communication to these ports from trusted IP addresses. Unicast RPF should also be considered, to offer a comprehensive solution.

Control Plane Policing (CoPP) can be used to block untrusted UDP traffic to the device. Cisco IOS Software Releases 12.0S, 12.2SX, 12.2S, 12.3T, 12.4, and 12.4T support the CoPP feature. CoPP can be configured on a device to help protect the management and control planes and minimize the risk and effectiveness of direct infrastructure attacks by explicitly permitting only authorized traffic that is sent to infrastructure devices in accordance with existing security policies and configurations. The CoPP example below should be included as part of the deployed CoPP policy, which will help protect all devices with IP addresses in the infrastructure IP address range.
```
 
 
!---
!--- Feature: Label Distribution Protocol (LDP)
!--- 
 
 
access-list 150 deny udp TRUSTED_SOURCE_ADDRESSES 
     WILDCARD any eq 646
 
 
!---
!--- Deny LDP traffic from all other sources destined
!--- to the device control plane.
!--- 
 
 
access-list 150 permit udp any any eq 646
 
 
!---
!--- Permit (Police or Drop)/Deny (Allow) all other Layer3 and 
!--- Layer4 traffic in accordance with existing security policies
!--- and configurations for traffic that is authorized to be sent
!--- to infrastructure devices
!--- Create a Class-Map for traffic to be policed by
!--- the CoPP feature
!--- 
 
 
class-map match-all drop-ldp-class
 match access-group 150
 
 
!---
!--- Create a Policy-Map that will be applied to the
!--- Control-Plane of the device.
!--- 
 
 
policy-map control-plane-policy
 class drop-ldp-class
  drop
 
 
!---
!--- Apply the Policy-Map to the 
!--- Control-Plane of the device
!--- 
 
 
 
control-plane
 service-policy input control-plane-policy
```
In the above CoPP example, the access control entries (ACEs) that match the potential exploit packets with the "permit" action result in these packets being discarded by the policy-map "drop" function, while packets that match the "deny" action (not shown) are not affected by the policy-map drop function. Please note that the policy-map syntax is different in the 12.2S and 12.0S Cisco IOS Software trains:
```
policy-map control-plane-policy
class drop-udp-class
police 32000 1500 1500 conform-action drop exceed-action drop
```
Additional information on the configuration and use of the CoPP feature can be found in the documents, "Control Plane Policing Implementation Best Practices" and "Cisco IOS Software Releases 12.2 S - Control Plane Policing" at these links: http://www.cisco.com/web/about/security/intelligence/coppwp_gs.html and http://www.cisco.com/en/US/docs/ios/12_3t/12_3t4/feature/guide/gtrtlimt.html

Receive ACLs (rACL)

Warning: Because the feature in this vulnerability utilizes UDP as a transport, it is possible to spoof the sender's IP address, which may defeat ACLs that permit communication to these ports from trusted IP addresses. Unicast RPF should also be considered, to offer a comprehensive solution.

For distributed platforms, Receive ACLs may be an option starting in Cisco IOS Software Versions 12.0(21)S2 for the 12000 (GSR), 12.0(24)S for the 7500, and 12.0(31)S for the 10720. The Receive ACL protects the device from harmful traffic before the traffic can impact the route processor. Receive ACLs are designed to only protect the device on which it is configured. On the 12000, 7500, and 10720, transit traffic is never affected by a receive ACL. Because of this, the destination IP address "any" used in the example ACL entries below only refer to the router's own physical or virtual IP addresses. Receive ACLs are considered a network security best practice, and should be considered as a long-term addition to good network security, as well as a workaround for this specific vulnerability. The white paper entitled "GSR: Receive Access Control Lists" will help you identify and allow legitimate traffic to your device and deny all unwanted packets. This white paper is available at the following link http://www.cisco.com/en/US/tech/tk648/tk361/technologies_white_paper09186a00801a0a5e.shtml

This is the receive path ACL written to permit this type of traffic from trusted hosts:
```
 
 
!---
!--- Feature: Label Distribution Protocol (LDP)
!--- 
 
 
 
!---
!--- Permit LDP traffic from all trusted sources allowed
!--- to infrastructure addresses.
!--- 
 
 
access-list 150 permit udp TRUSTED_SOURCE_ADDRESSES WILDCARD
     any eq 646
 
 
!---
!--- Deny LDP traffic from all other sources destined
!--- to infrastructure addresses.
!--- 
 
 
access-list 150 deny udp any any eq 646
 
 
!---
!--- Permit all other traffic to the RP.
!--- according to security policy and configurations.
!---
 
 
access-list 150 permit ip any any
 
 
!---
!--- Apply this access list to the 'receive' path.
!--- 
 
 
ip receive access-list 150
 
```

Fixed Software

When considering software upgrades, also consult http://www.cisco.com/go/psirt and any subsequent advisories to determine exposure and a complete upgrade solution.

In all cases, customers should exercise caution to be certain the devices to be upgraded contain sufficient memory and that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, contact the Cisco Technical Assistance Center (TAC) or your contracted maintenance provider for assistance.

Each row of the Cisco IOS software table (below) names a Cisco IOS release train. If a given release train is vulnerable, then the earliest possible releases that contain the fix (along with the anticipated date of availability for each, if applicable) are listed in the "First Fixed Release" column of the table. The "First Fixed Release for all Advisories in 24 March 2010 Bundle Publication" column indicates the earliest possible releases which have fixes for all the published vulnerabilities in this Cisco IOS Security Advisory bundled publication. Cisco recommends upgrading to the latest available release where possible.

Major Release	Availability of Repaired Releases
Affected 12.0-Based Releases	First Fixed Release for this Advisory	First Fixed Release for all Advisories in 24 March 2010 Bundle Publication
12.0	Not Vulnerable	Not Vulnerable
12.0DA	Not Vulnerable	Not Vulnerable
12.0DB	Not Vulnerable	Not Vulnerable
12.0DC	Not Vulnerable	Not Vulnerable
12.0S	12.0(32)S15; Available on 25-MAR-10 12.0(33)S6	12.0(32)S15; Available on 25-MAR-10 12.0(33)S6
12.0SC	Not Vulnerable	Not Vulnerable
12.0SL	Vulnerable; first fixed in 12.0S Releases up to and including 12.0(14)SL1 are not vulnerable.	Releases up to and including 12.0(14)SL1 are not vulnerable; First fixed in 12.0S
12.0SP	Not Vulnerable	Not Vulnerable
12.0ST	Releases up to and including 12.0(9)ST are not vulnerable.	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
12.0SX	Vulnerable; first fixed in 12.0S	Vulnerable; first fixed in 12.0S
12.0SY	12.0(32)SY11 12.0(32)SY9b	12.0(32)SY11 12.0(32)SY9b
12.0SZ	Vulnerable; first fixed in 12.0S	Vulnerable; first fixed in 12.0S
12.0T	Not Vulnerable	Not Vulnerable
12.0W	Not Vulnerable	Not Vulnerable
12.0WC	Not Vulnerable	Not Vulnerable
12.0WT	Not Vulnerable	Not Vulnerable
12.0XA	Not Vulnerable	Not Vulnerable
12.0XB	Not Vulnerable	Not Vulnerable
12.0XC	Not Vulnerable	Not Vulnerable
12.0XD	Not Vulnerable	Not Vulnerable
12.0XE	Not Vulnerable	Not Vulnerable
12.0XF	Not Vulnerable	Not Vulnerable
12.0XG	Not Vulnerable	Not Vulnerable
12.0XH	Not Vulnerable	Not Vulnerable
12.0XI	Not Vulnerable	Not Vulnerable
12.0XJ	Not Vulnerable	Not Vulnerable
12.0XK	Not Vulnerable	Not Vulnerable
12.0XL	Not Vulnerable	Not Vulnerable
12.0XM	Not Vulnerable	Not Vulnerable
12.0XN	Not Vulnerable	Not Vulnerable
12.0XQ	Not Vulnerable	Not Vulnerable
12.0XR	Not Vulnerable	Not Vulnerable
12.0XS	Not Vulnerable	Not Vulnerable
12.0XT	Not Vulnerable	Not Vulnerable
12.0XV	Not Vulnerable	Not Vulnerable
Affected 12.1-Based Releases	First Fixed Release for this Advisory	First Fixed Release for all Advisories in 24 March 2010 Bundle Publication
12.1	Not Vulnerable	Not Vulnerable
12.1AA	Not Vulnerable	Not Vulnerable
12.1AX	Vulnerable; first fixed in 12.2SE Releases up to and including 12.1(11)AX are not vulnerable.	Releases up to and including 12.1(11)AX are not vulnerable; first fixed in 12.2SE
12.1AY	Not Vulnerable	Not Vulnerable
12.1AZ	Not Vulnerable	Not Vulnerable
12.1CX	Not Vulnerable	Not Vulnerable
12.1DA	Not Vulnerable	Not Vulnerable
12.1DB	Not Vulnerable	Not Vulnerable
12.1DC	Not Vulnerable	Not Vulnerable
12.1E	Vulnerable; first fixed in 12.2SXF Releases up to 12.1(8a)E are not vulnerable.	Releases up to and including 12.1(7a)E1a are not vulnerable; migrate to any release in 12.2SXF
12.1EA	12.1(22)EA14; Available on 27-JUL-10	Releases up to and including 12.1(6)EA2c are not vulnerable. Releases 12.1(8)EA1c and later are not vulnerable.
12.1EB	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.1EC	Vulnerable; first fixed in 12.2SCB Releases up to and including 12.1(7)EC are not vulnerable.	Releases up to and including 12.1(7)EC are not vulnerable; migrate to 12.2SCB
12.1EO	Releases up to and including 12.1(19)EO6 are not vulnerable.	Releases up to and including 12.1(19)EO6 are not vulnerable.
12.1EU	Not Vulnerable	Not Vulnerable
12.1EV	Not Vulnerable	Not Vulnerable
12.1EW	Not Vulnerable	Not Vulnerable
12.1EX	Vulnerable; migrate to any release in 12.2 Releases up to and including 12.1(6)EX are not vulnerable.	Vulnerable; migrate to any release in 12.2
12.1EY	Releases up to and including 12.1(7a)EY3 are not vulnerable.	Releases up to and including 12.1(7a)EY3 are not vulnerable.
12.1EZ	Not Vulnerable	Not Vulnerable
12.1GA	Not Vulnerable	Not Vulnerable
12.1GB	Not Vulnerable	Not Vulnerable
12.1T	Not Vulnerable	Not Vulnerable
12.1XA	Not Vulnerable	Not Vulnerable
12.1XB	Not Vulnerable	Not Vulnerable
12.1XC	Not Vulnerable	Not Vulnerable
12.1XD	Not Vulnerable	Not Vulnerable
12.1XE	Not Vulnerable	Not Vulnerable
12.1XF	Not Vulnerable	Not Vulnerable
12.1XG	Not Vulnerable	Not Vulnerable
12.1XH	Not Vulnerable	Not Vulnerable
12.1XI	Not Vulnerable	Not Vulnerable
12.1XJ	Not Vulnerable	Not Vulnerable
12.1XL	Not Vulnerable	Not Vulnerable
12.1XM	Not Vulnerable	Not Vulnerable
12.1XP	Not Vulnerable	Not Vulnerable
12.1XQ	Not Vulnerable	Not Vulnerable
12.1XR	Not Vulnerable	Not Vulnerable
12.1XS	Not Vulnerable	Not Vulnerable
12.1XT	Not Vulnerable	Not Vulnerable
12.1XU	Not Vulnerable	Vulnerable; migrate to any release in 12.2
12.1XV	Note: Releases prior to 12.1(5)XV1 are vulnerable, release 12.1(5)XV1 and later are not vulnerable;	Releases prior to 12.1(5)XV1 are vulnerable, release 12.1(5)XV1 and later are not vulnerable
12.1XW	Not Vulnerable	Not Vulnerable
12.1XX	Not Vulnerable	Not Vulnerable
12.1XY	Not Vulnerable	Not Vulnerable
12.1XZ	Not Vulnerable	Not Vulnerable
12.1YA	Not Vulnerable	Not Vulnerable
12.1YB	Vulnerable; migrate to any release in 12.2	Vulnerable; migrate to any release in 12.2
12.1YC	Not Vulnerable	Not Vulnerable
12.1YD	Vulnerable; migrate to any release in 12.2	Vulnerable; migrate to any release in 12.2
12.1YE	Releases prior to 12.1(5)YE1 are vulnerable, release 12.1(5)YE1 and later are not vulnerable;	Releases prior to 12.1(5)YE6 are vulnerable, release 12.1(5)YE6 and later are not vulnerable.
12.1YF	Not Vulnerable	Not Vulnerable
12.1YH	Not Vulnerable	Not Vulnerable
12.1YI	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.1YJ	Not Vulnerable	Not Vulnerable
Affected 12.2-Based Releases	First Fixed Release for this Advisory	First Fixed Release for all Advisories in 24 March 2010 Bundle Publication
12.2	Not Vulnerable	Not Vulnerable
12.2B	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.2BC	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.2BW	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.2BX	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.2BY	Releases prior to 12.2(8)BY are vulnerable, release 12.2(8)BY and later are not vulnerable; first fixed in 12.4	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.2BZ	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.2CX	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.2CY	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.2CZ	Not Vulnerable	Vulnerable; migrate to any release in 12.2SRE
12.2DA	Not Vulnerable	Not Vulnerable
12.2DD	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.2DX	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.2EW	Not Vulnerable	Not Vulnerable
12.2EWA	Not Vulnerable	Not Vulnerable
12.2EX	Releases up to and including 12.2(37)EX are not vulnerable. Releases 12.2(44)EX and later are not vulnerable; first fixed in 12.2SE	Releases up to and including 12.2(37)EX are not vulnerable. Releases 12.2(44)EX and later are not vulnerable; first fixed in 12.2SE
12.2EY	Releases prior to 12.2(37)EY are vulnerable, release 12.2(37)EY and later are not vulnerable; first fixed in 12.2SE	Releases prior to 12.2(37)EY are vulnerable, release 12.2(37)EY and later are not vulnerable
12.2EZ	Not Vulnerable	Not Vulnerable
12.2FX	Not Vulnerable	Not Vulnerable
12.2FY	Not Vulnerable	Not Vulnerable
12.2FZ	Not Vulnerable	Not Vulnerable
12.2IRA	Vulnerable; first fixed in 12.2SRC	Vulnerable; first fixed in 12.2SRC
12.2IRB	Vulnerable; first fixed in 12.2SRC	Vulnerable; first fixed in 12.2SRC
12.2IRC	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.2IRD	Vulnerable; 12.2(33)IRE, available on 15-April-10	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.2IXA	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.2IXB	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.2IXC	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.2IXD	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.2IXE	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.2IXF	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.2IXG	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.2IXH	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.2JA	Not Vulnerable	Releases up to and including 12.2(4)JA1 are not vulnerable.
12.2JK	Not Vulnerable	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.2MB	Not Vulnerable	Not Vulnerable
12.2MC	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.	Vulnerable; first fixed in 12.4
12.2MRA	Not Vulnerable	Not Vulnerable
12.2S	Releases prior to 12.2(30)S are vulnerable, release 12.2(30)S and later are not vulnerable; first fixed in 12.2SB	Releases prior to 12.2(30)S are vulnerable, release 12.2(30)S and later are not vulnerable;
12.2SB	12.2(31)SB18; Available on 24-MAR-10 12.2(33)SB8	12.2(33)SB8 12.2(31)SB18; Available on 24-MAR-10
12.2SBC	Vulnerable; first fixed in 12.2SB	Vulnerable; migrate to any release in 12.2SRE
12.2SCA	Vulnerable; first fixed in 12.2SCB	Vulnerable; first fixed in 12.2SCB
12.2SCB	12.2(33)SCB6	12.2(33)SCB6
12.2SCC	12.2(33)SCC1	12.2(33)SCC1
12.2SCD	Not Vulnerable	Not Vulnerable
12.2SE	12.2(50)SE4; Available on 25-MAR-10	12.2(50)SE4; Available on 25-MAR-10
12.2SEA	Not Vulnerable	Not Vulnerable
12.2SEB	Not Vulnerable	Not Vulnerable
12.2SEC	Not Vulnerable	Not Vulnerable
12.2SED	Vulnerable; first fixed in 12.2SE	Vulnerable; first fixed in 12.2SE
12.2SEE	Vulnerable; first fixed in 12.2SE	Vulnerable; first fixed in 12.2SE
12.2SEF	Not Vulnerable	Not Vulnerable
12.2SEG	Releases prior to 12.2(25)SEG4 are vulnerable, release 12.2(25)SEG4 and later are not vulnerable; first fixed in 12.2SE	Releases prior to 12.2(25)SEG4 are vulnerable, release 12.2(25)SEG4 and later are not vulnerable; first fixed in 12.2SE
12.2SG	Releases up to and including 12.2(31)SG1 are not vulnerable; Release 12.2(40)SG and later are not vulnerable;	Releases up to 12.2(31)SG1 are not vulnerable; releases 12.2(40)SG and later are not vulnerable.
12.2SGA	Not Vulnerable	Not Vulnerable
12.2SL	Not Vulnerable	Not Vulnerable
12.2SM	Not Vulnerable	Not Vulnerable
12.2SO	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.2SQ	Not Vulnerable	Not Vulnerable
12.2SRA	Vulnerable; first fixed in 12.2SRD	Vulnerable; first fixed in 12.2SRD
12.2SRB	Vulnerable; first fixed in 12.2SRD	Vulnerable; first fixed in 12.2SRD
12.2SRC	12.2(33)SRC5	12.2(33)SRC5
12.2SRD	12.2(33)SRD3	12.2(33)SRD3
12.2SRE	Not Vulnerable	Not Vulnerable
12.2STE	Not Vulnerable	Not Vulnerable
12.2SU	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.2SV	p>Releases up to and including 12.2(18)SV2 are not vulnerable.	Releases up to and including 12.2(18)SV2 are not vulnerable.
12.2SVA	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.2SVC	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.2SVD	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.2SVE	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.2SW	Releases prior to 12.2(25)SW12 are vulnerable, release 12.2(25)SW12 and later are not vulnerable; migrate to any release in 12.4SW	Releases up to and including 12.2(25)SW3 are not vulnerable. Releases 12.2(25)SW12 and later are not vulnerable; first fixed in 15.0M
12.2SX	Vulnerable; first fixed in 12.2SXF	Vulnerable; first fixed in 12.2SXF
12.2SXA	Vulnerable; first fixed in 12.2SXF	Vulnerable; first fixed in 12.2SXF
12.2SXB	Vulnerable; first fixed in 12.2SXF	Vulnerable; first fixed in 12.2SXF
12.2SXD	Vulnerable; first fixed in 12.2SXF	Vulnerable; first fixed in 12.2SXF
12.2SXE	Vulnerable; first fixed in 12.2SXF	Vulnerable; first fixed in 12.2SXF
12.2SXF	12.2(18)SXF17a	12.2(18)SXF17a
12.2SXH	12.2(33)SXH6	12.2(33)SXH6
12.2SXI	12.2(33)SXI2 12.2(33)SXI2a	12.2(33)SXI2a 12.2(33)SXI3
12.2SY	Vulnerable; first fixed in 12.2SB	Vulnerable; migrate to any release in 12.2SRE
12.2SZ	Vulnerable; first fixed in 12.2SB	Vulnerable; migrate to any release in 12.2SRE
12.2T	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.2TPC	Releases up to and including 12.2(8)TPC10a are not vulnerable.	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.2XA	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release. Releases up to and including 12.2(1)XA are not vulnerable.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.2XB	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.2XC	Not Vulnerable	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.2XD	Not Vulnerable	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.2XE	Not Vulnerable	Not Vulnerable
12.2XF	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.2XG	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.2XH	Not Vulnerable	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.2XI	Not Vulnerable	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.2XJ	Not Vulnerable	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.2XK	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.2XL	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.2XM	Not Vulnerable	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.2XN	Releases prior to 12.2(33)XN1 are vulnerable, release 12.2(33)XN1 and later are not vulnerable; first fixed in 12.2SRC	Releases prior to 12.2(33)XN1 are vulnerable, release 12.2(33)XN1 and later are not vulnerable; first fixed in 12.2SRC
12.2XNA	Please see Cisco IOS-XE Software Availability	Please see Cisco IOS-XE Software Availability
12.2XNB	Please see Cisco IOS-XE Software Availability	Please see Cisco IOS-XE Software Availability
12.2XNC	Please see Cisco IOS-XE Software Availability	Please see Cisco IOS-XE Software Availability
12.2XND	Please see Cisco IOS-XE Software Availability	Please see Cisco IOS-XE Software Availability
12.2XNE	Please see Cisco IOS-XE Software Availability	Please see Cisco IOS-XE Software Availability
12.2XNF	Please see Cisco IOS-XE Software Availability	Please see Cisco IOS-XE Software Availability
12.2XO	Not Vulnerable	Not Vulnerable
12.2XQ	Not Vulnerable	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.2XR	Not Vulnerable	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.2XS	Not Vulnerable	Not Vulnerable
12.2XT	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.2XU	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.2XV	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.2XW	Not Vulnerable	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.2YA	Not Vulnerable	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.2YB	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.2YC	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.2YD	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.2YE	Not Vulnerable	Not Vulnerable
12.2YF	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.2YG	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.2YH	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.2YJ	Releases prior to 12.2(8)YJ1 are vulnerable, release 12.2(8)YJ1 and later are not vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.2YK	Not Vulnerable	Not Vulnerable
12.2YL	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.2YM	Not Vulnerable	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.2YN	Releases prior to 12.2(8)YN1 are vulnerable, release 12.2(8)YN1 and later are not vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.2YO	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.2YP	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release. Releases up to and including 12.2(8)YP are not vulnerable.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.2YQ	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.2YR	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.2YS	Not Vulnerable	Not Vulnerable
12.2YT	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.2YU	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.2YV	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.2YW	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.2YX	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.2YY	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.2YZ	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.2ZA	Vulnerable; first fixed in 12.2SXF	Vulnerable; first fixed in 12.2SXF
12.2ZB	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.2ZC	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.2ZD	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.2ZE	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.2ZF	Not Vulnerable	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.2ZG	Not Vulnerable	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.2ZH	Not Vulnerable	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.2ZJ	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.2ZL	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.2ZP	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.2ZU	Vulnerable; first fixed in 12.2SXH	Vulnerable; first fixed in 12.2SXH
12.2ZX	Vulnerable; first fixed in 12.2SB	Vulnerable; migrate to any release in 12.2SRE
12.2ZY	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.2ZYA	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
Affected 12.3-Based Releases	First Fixed Release for this Advisory	First Fixed Release for all Advisories in 24 March 2010 Bundle Publication
12.3	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.3B	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.3BC	Vulnerable; first fixed in 12.2SCB	Vulnerable; first fixed in 12.2SCB
12.3BW	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.3EU	Not Vulnerable	Not Vulnerable
12.3JA	Not Vulnerable	Releases prior to 12.3(11)JA5 are vulnerable, release 12.3(11)JA5 and later are not vulnerable
12.3JEA	Not Vulnerable	Releases prior to 12.3(8)JEA4 are vulnerable, release 12.3(8)JEA4 and later are not vulnerable
12.3JEB	Not Vulnerable	Releases prior to 12.3(8)JEB2 are vulnerable, release 12.3(8)JEB2 and later are not vulnerable
12.3JEC	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.3JED	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.3JK	Releases up to and including 12.3(2)JK3 are not vulnerable. Releases 12.3(8)JK1 and later are not vulnerable; first fixed in 12.4	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.3JL	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.3JX	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.3T	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.3TPC	Releases up to and including 12.3(4)TPC11a are not vulnerable.	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.3VA	Not Vulnerable	Not Vulnerable
12.3XA	Releases up to and including 12.3(2)XA3 are not vulnerable. Releases 12.3(2)XA7 and later are not vulnerable; first fixed in 12.4	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.3XB	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.3XC	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release. Releases up to and including 12.3(2)XC4 are not vulnerable.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.3XD	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.3XE	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release. Releases up to and including 12.3(2)XE4 are not vulnerable.	Vulnerable; first fixed in 12.4 Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.3XF	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.3XG	Not Vulnerable	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.3XI	Releases prior to 12.3(7)XI11 are vulnerable, release 12.3(7)XI11 and later are not vulnerable; first fixed in 12.2SB	Releases prior to 12.3(7)XI11 are vulnerable, release 12.3(7)XI11 and later are not vulnerable
12.3XJ	Releases prior to 12.3(7)XJ2 are vulnerable, release 12.3(7)XJ2 and later are not vulnerable; migrate to any release in 12.4XN	Vulnerable; first fixed in 12.4XR
12.3XK	Not Vulnerable	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.3XL	Vulnerable; migrate to any release in 15.0M or a fixed 12.4T release.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.3XQ	Not Vulnerable	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.3XR	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release. Releases up to and including 12.3(7)XR6 are not vulnerable.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.3XS	Not Vulnerable	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.3XU	Not Vulnerable	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.3XW	Vulnerable; migrate to any release in 12.4XN	Vulnerable; first fixed in 12.4XR
12.3XX	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release. Releases up to and including 12.3(8)XX1 are not vulnerable.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.3XY	Not Vulnerable	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.3XZ	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.3YA	Not Vulnerable	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.3YD	Not Vulnerable	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.3YF	Releases prior to 12.3(11)YF1 are vulnerable, release 12.3(11)YF1 and later are not vulnerable;	Vulnerable; first fixed in 12.4XR
12.3YG	Vulnerable; migrate to any release in 15.0M or a fixed 12.4T release. Releases up to and including 12.3(8)YG5 are not vulnerable.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.3YH	Vulnerable; migrate to any release in 15.0M or a fixed 12.4T release.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.3YI	Vulnerable; migrate to any release in 15.0M or a fixed 12.4T release.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.3YJ	Not Vulnerable	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.3YK	Vulnerable; migrate to any release in 15.0M or a fixed 12.4T release. Releases prior to 12.3(11)YK1 are vulnerable, release 12.3(11)YK1 and later are not vulnerable;	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.3YM	Not Vulnerable	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.3YQ	Not Vulnerable	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.3YS	Vulnerable; migrate to any release in 15.0M or a fixed 12.4T release. Releases up to and including 12.3(11)YS1 are not vulnerable.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.3YT	Vulnerable; migrate to any release in 15.0M or a fixed 12.4T release.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.3YU	Vulnerable; migrate to any release in 12.4XB Releases up to and including 12.3(14)YU are not vulnerable.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.3YX	Releases prior to 12.3(14)YX10 are vulnerable, release 12.3(14)YX10 and later are not vulnerable; migrate to any release in 12.4XN	Vulnerable; first fixed in 12.4XR
12.3YZ	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.3ZA	Vulnerable; migrate to any release in 15.0M or a fixed 12.4T release.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
Affected 12.4-Based Releases	First Fixed Release for this Advisory	First Fixed Release for all Advisories in 24 March 2010 Bundle Publication
12.4	12.4(25c)	12.4(25c) 15.0(1)M1
12.4GC	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.4JA	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.4JDA	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.4JDC	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.4JDD	Not Vulnerable	12.4(10b)JDD1
12.4JHA	Not Vulnerable	Not Vulnerable
12.4JK	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.4JL	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.4JMA	Not Vulnerable	Releases prior to 12.4(3g)JMA2 are vulnerable, release 12.4(3g)JMA2 and later are not vulnerable
12.4JMB	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.4JX	Not Vulnerable	Vulnerable; first fixed in 12.4JA
12.4MD	Not Vulnerable	12.4(24)MD
12.4MDA	Not Vulnerable	12.4(22)MDA2
12.4MR	12.4(20)MR2	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.4SW	Not Vulnerable	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.4T	12.4(15)T10, 12.4(20)T4, 12.4(22)T3, 12.4(24)T2	12.4(15)T12 12.4(20)T5 12.4(24)T3; Available on 26-MAR-10 12.4(22)T4
12.4XA	Vulnerable; migrate to any release in 15.0M or a fixed 12.4T release.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.4XB	Not Vulnerable	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.4XC	Vulnerable; migrate to any release in 15.0M or a fixed 12.4T release.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.4XD	Vulnerable; migrate to any release in 15.0M or a fixed 12.4T release.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.4XE	Vulnerable; migrate to any release in 15.0M or a fixed 12.4T release.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.4XF	Not Vulnerable	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.4XG	Not Vulnerable	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.4XJ	Vulnerable; migrate to any release in 15.0M or a fixed 12.4T release.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.4XK	Vulnerable; migrate to any release in 15.0M or a fixed 12.4T release.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.4XL	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.4XM	Not Vulnerable	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.4XN	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.4XP	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.4XQ	Vulnerable; migrate to any release in 15.0M or a fixed 12.4T release.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.4XR	12.4(22)XR3	12.4(22)XR3
12.4XT	Vulnerable; migrate to any release in 15.0M or a fixed 12.4T release.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.4XV	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.4XW	Vulnerable; migrate to any release in 15.0M or a fixed 12.4T release.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.4XY	Vulnerable; migrate to any release in 15.0M or a fixed 12.4T release.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.4XZ	Vulnerable; migrate to any release in 15.0M or a fixed 12.4T release.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.4YA	Vulnerable; migrate to any release in 15.0M or a fixed 12.4T release.	Vulnerable; migrate to any release in 15.0M or a fixed 12.4 release.
12.4YB	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.4YD	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
12.4YE	12.4(22)YE2	12.4(22)YE2 12.4(24)YE
12.4YG	Not Vulnerable	Vulnerable; Contact your support organization per the instructions in Obtaining Fixed Software section of this advisory
Affected 15.0-Based Releases	First Fixed Release for this Advisory	First Fixed Release for all Advisories in 24 March 2010 Bundle Publication
There are no affected 15.0 based releases
Affected 15.1-Based Releases	First Fixed Release for this Advisory	First Fixed Release for all Advisories in 24 March 2010 Bundle Publication
There are no affected 15.1 based releases

Cisco IOS XE Software

Cisco IOS XE Software Release	First Fixed Release
2.1.x	Vulnerable, Migrate to 2.3.2 or later
2.2.x	Vulnerable, Migrate to 2.3.2 or later
2.3.x	2.3.2
2.4.x	Not Vulnerable
2.5.x	Not Vulnerable
2.6.x	Not Vulnerable

Cisco IOS XR Software

This vulnerability can be addressed by applying the appropriate Software Maintenance Upgrade (SMU), per the table below. Installation of the appropriate SMU does not require a system reload. Refer to the document "Guidelines for Cisco IOS XR Software" at the following link for additional information on Cisco IOS XR Software and SMUs: http://www.cisco.com/en/US/prod/collateral/iosswrel/ps8803/ps5845/product_bulletin_c25-478699.htm

Cisco IOS XR Software Version	SMU ID	SMU Name
3.2.X	Vulnerable; Migrate to 3.5.2 or later.
3.3.X	Vulnerable; Migrate to 3.5.2 or later.
3.4.0	Vulnerable; Migrate to 3.5.2 or later.
3.4.1	AA03710 AA03707	c12k-mpls-3.4.1.CSCsj25893 hfr-mpls-3.4.1.CSCsj25893
3.4.2	AA03711 AA03708	c12k-mpls-3.4.2.CSCsj25893 hfr-mpls-3.4.2.CSCsj25893
3.4.3	AA03712 AA03709	c12k-mpls-3.4.3.CSCsj25893 hfr-mpls-3.4.3.CSCsj25893
3.5.2	Not Vulnerable
3.5.3	Not Vulnerable
3.5.4	Not Vulnerable
3.6.X	Not Vulnerable
3.7.X	Not Vulnerable
3.8.X	Not Vulnerable
3.9.X	Not Vulnerable

Exploitation and Public Announcements

The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability described in this advisory.

This vulnerability was discovered during internal testing.

Cisco Security Vulnerability Policy

To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.

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Revision History

Revision 1.1	2010-March-26	Update made to iACL example.
Revision 1.0	2010-March-24	Initial public release.

Legal Disclaimer

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A stand-alone copy or paraphrase of the text of this document that omits the distribution URL is an uncontrolled copy, and may lack important information or contain factual errors. The information in this document is intended for end-users of Cisco products.

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Cisco IOS Software Multiprotocol Label Switching Packet Vulnerability

Summary

Affected Products

Vulnerable Products

Products Confirmed Not Vulnerable

Details

Workarounds

Fixed Software

Exploitation and Public Announcements

Cisco Security Vulnerability Policy

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