4A vulnerability in the TCP stack of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. The vulnerability is due to improper processing of certain TCP packets in the closing sequence of a TCP session while the affected device is in a TIME_WAIT state. An attacker could exploit this vulnerability by sending a specific TCP packet to an affected device on a TCP session that is already in a TIME_WAIT state. An exploit could allow the attacker to cause a reload of the TCP stack on the affected device, resulting in a DoS condition. This vulnerability can be exploited using either IPv4 or IPv6 packets. The vulnerability can be triggered by a crafted sequence of TCP packets destined for TCP ports listening on the device. The packets may use the IPv4 or IPv6 unicast address of any interface configured on the device. This vulnerability can be triggered only by traffic destined to an affected device and cannot be exploited using traffic that transits an affected device. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link: http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160302-netstack
# show version Cisco Nexus Operating System (NX-OS) Software TAC support: http://www.cisco.com/tac Documents: http://www.cisco.com/en/US/products/ps9372/tsd_products_support_series_home.html Copyright (c) 2002-2012, Cisco Systems, Inc. All rights reserved. The copyrights to certain works contained herein are owned by other third parties and are used and distributed under license. Some parts of this software are covered under the GNU Public License. A copy of the license is available at http://www.gnu.org/licenses/gpl.html. Software BIOS: version 3.6.0 loader: version N/A kickstart: version 7.1(1)N1(1) system: version 7.1(1)N1(1)
Cisco NX-OS Software Major Release - Cisco UCS |
First Fixed Release for This Vulnerability | First Fixed Release for This Vulnerability and All Vulnerabilities Described in the Collection of Advisories |
---|---|---|
Prior to 2.1 | Affected; migrate to 2.2(2c) |
2.2(2c) or later |
2.1 |
Affected; migrate to 2.2(2c) |
2.2(2c) or later |
2.2 |
2.2(2c) | 2.2(2c) or later |
3.0 | Not affected | Not affected |
Cisco NX-OS Software Major Release - Nexus 1000V Series Switches |
First Fixed Release for This Vulnerability | First Fixed Release for This Vulnerability and All Vulnerabilities Described in the Collection of Advisories |
---|---|---|
Prior to 5.2 | Affected; migrate to 5.2(1)SV3(1.1) | 5.2(1)SV3(1.1) or later |
5.2 | 5.2(1)SV3(1.1) |
5.2(1)SV3(1.1) or later |
Cisco NX-OS Software Major Release - Nexus 3000 Series Switches |
First Fixed Release for This Vulnerability | First Fixed Release for This Vulnerability and All Vulnerabilities Described in the Collection of Advisories |
---|---|---|
Prior to 6.0 | Affected; migrate to 6.0(2)U1(1) |
6.0(2)U6(5a) or later |
6.0 | 6.0(2)U1(1) |
6.0(2)U6(5a) or later |
7.0 | Not affected | Not affected |
Cisco NX-OS Software Major Release - Nexus 3500 Platform Switches |
First Fixed Release for This Vulnerability | First Fixed Release for This Vulnerability and All Vulnerabilities Described in the Collection of Advisories |
---|---|---|
Prior to 6.0 | Affected; migrate to 6.0(2)A1(1) |
6.0(2)A6(5a) or later |
6.0 | 6.0(2)A1(1) |
6.0(2)A6(5a) or later |
7.0 | Not affected | Not affected |
Cisco NX-OS Software Major Release - Nexus 4000 Series Switches |
First Fixed Release for This Vulnerability | First Fixed Release for This Vulnerability and All Vulnerabilities Described in the Collection of Advisories |
---|---|---|
4.1 | 4.1(2)E1(1n) |
4.1(2)E1(1n) or later |
Cisco NX-OS Software Major Release - Nexus 5000 Series Switches |
First Fixed Release for This Vulnerability | First Fixed Release for This Vulnerability and All Vulnerabilities Described in the Collection of Advisories |
---|---|---|
Prior to 5.2 | Affected; migrate to 5.2(1)N1(9) | 5.2(1)N1(9) or later |
5.2 |
5.2(1)N1(9) |
5.2(1)N1(9)or later |
Cisco NX-OS Software Major Release - Nexus 5500 Platform and 6000 Series Switches |
First Fixed Release for This Vulnerability | First Fixed Release for This Vulnerability and All Vulnerabilities Described in the Collection of Advisories |
---|---|---|
Prior to 5.2 | Affected; migrate to 5.2(1)N1(9) | 7.1(2)N1(1) or later |
5.2 |
5.2(1)N1(9) |
5.2(1)N1(9) or later |
6.0 |
6.0(2)N2(7) |
6.0(2)N2(7) or later |
7.0 | 7.0(0)N1(1) | 7.0(0)N1(1) or later |
7.1 | Not affected | 7.1(2)N1(1) or later |
7.2 | Not affected | 7.1(2)N1(1) or later |
Cisco NX-OS Software Major Release - Nexus 7000 Series and 7700 Series Switches |
First Fixed Release for This Vulnerability | First Fixed Release for This Vulnerability and All Vulnerabilities Described in the Collection of Advisories |
---|---|---|
Prior to 5.2 | Affected; migrate to 5.2(9) |
5.2(9) or later |
5.2 |
5.2(9) |
5.2(9) or later |
6.0 | Affected; migrate to 6.1(4a) | 6.1(4a) or later |
6.1 | 6.1(4a) | 6.1(4a) or later |
6.2 | 6.2(2) | 6.2(2) or later |
7.2 | Not affected | Not affected |
7.3 | Not affected |
Not affected |
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.
Version | Description | Section | Status | Date |
---|---|---|---|---|
1.4 | Metadata update. | - | Final | 2017-December-05 |
1.3 | Metadata update. | - | Final | 2017-November-28 |
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