Multiple Vulnerabilities in Cisco Secure Access Control System

Summary

• Cisco Secure Access Control System (ACS) is affected by the following vulnerabilities:
  

  • Cisco Secure ACS RMI Privilege Escalation Vulernability
  • Cisco Secure ACS RMI Unauthenticated User Access Vulnerability
  • Cisco Secure ACS Operating System Command Injection Vulnerability

  Cisco Secure ACS uses the Remote Method Invocation (RMI) interface for internode communication using TCP ports 2020 and 2030.

  These vulnerabilities are independent of each other; a release that is affected by one of the vulnerabilities may not be affected by the other.
  
  Cisco has released software updates that address these vulnerabilities. This advisory is available at the following link:
  
  http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20140115-csacs
  
  Network-based mitigations for the RMI-based vulnerabilities are outlined in the Cisco Applied Mitigation Bulletin: Identifying and Mitigating the Multiple Vulnerabilities in Cisco Secure Access Control System
  http://tools.cisco.com/security/center/viewAMBAlert.x?alertId=32120

Affected Products

• 
  

  Vulnerable Products

  All releases of Cisco Secure ACS prior to release 5.5 are affected by the RMI-based vulnerabilities in this advisory.
  
  All releases of Cisco Secure ACS prior to ACS 5.4 patch 3 are affected by the OS command injection vulnerability in this advisory.
  

  Use the following methods to determine the version of Cisco Secure ACS that is running:

  • From the Cisco Secure ACS command-line interface (CLI), issue the show version command, as shown in the following example:
    

    acs51a/admin# show version
    
    Cisco Application Deployment Engine OS Release: 1.2
    ADE-OS Build Version: 1.2.0.152
    ADE-OS System Architecture: i386
    
    Copyright (c) 2005-2009 by Cisco Systems, Inc.
    All rights reserved.
    Hostname: acs51a
    
    
    Version information of installed applications
    ---------------------------------------------
    
     
    Cisco ACS VERSION INFORMATION
    -----------------------------
    Version : 5.1.0.44.6
    Internal Build ID : B.2347
    Patches : 
    5-1-0-44-3
    5-1-0-44-6
    
    acs51a/admin#

  • On the main login page of the Cisco Secure ACS web-based interface, the version information is displayed on the left side of the screen.
  • From the Cisco Secure ACS web-based interface, log in and click the About link at the top right corner of the screen.

  Cisco Secure ACS version 5.1 will identify itself as version 5.1.0.44, Cisco Secure ACS version 5.2 will identify itself as version 5.2.0.26 and Cisco Secure ACS version 5.3 will identify itself as version 5.3.0.40. The presence of an additional digit after the version number indicates the highest patch level installed. For example, a version number of 5.1.0.44.3 indicates Cisco Secure ACS version 5.1 with up to patch 3 installed. The absence of any additional digit after the version string indicates a Cisco Secure ACS version with no patches installed. The example above shows a Cisco Secure ACS running version 5.1 Patch 6.

  Products Confirmed Not Vulnerable

  The following Cisco Secure Access Control Server products are not affected by this vulnerabilities:
  
  

  • Cisco Secure Access Control Server for Windows
  • Cisco Secure Access Control Server Express
  • Cisco Secure Access Control Server View
  • Cisco Secure Access Control Server Solution Engine

  No other Cisco products are currently known to be affected by these vulnerabilities.

Details

• A core component of the Cisco TrustSec solution, Cisco Secure ACS is a highly sophisticated policy platform providing RADIUS and TACACS+ services. It supports the increasingly complex policies needed to meet today's new demands for access control management and compliance. Cisco Secure ACS provides central management of access policies for device administration and wireless, wired 802.1x, and remote VPN network access scenarios. The identity stores can be internal or external. An internal identity store has user credential information stored in an internal database. With an external identity store, Cisco Secure ACS will retrieve information from an external database.
  
  Cisco Secure ACS RMI Privilege Escalation Vulernability
  
  A vulnerability in the RMI interface of Cisco Secure ACS could allow an authenticated, remote attacker to perform actions as superadmin.
  
  The vulnerability is due to insufficient authorization enforcement. An attacker could exploit this vulnerability by accessing the ACS via the RMI interface using an authenticated user account. An exploit could allow the attacker to perform superadmin functions via RMI.
  
  This vulnerability is documented in Cisco bug ID CSCud75180 (registered customers only) and has been assigned CVE ID CVE-2014-0649.
  
  
  Cisco Secure ACS RMI Unauthenticated User Access Vulnerability
  
  A vulnerability in the RMI interface of Cisco Secure Access Control System (ACS) could allow an unauthenticated, remote attacker to access the ACS via the RMI interface.
  
  The vulnerability is due to insufficient authentication and authorization enforcement. An attacker could exploit this vulnerability by accessing the ACS via the RMI interface. An exploit could allow the attacker to access the ACS and perform administrative actions.
  
  This vulnerability is documented in Cisco bug ID CSCud75187 (registered customers only) and has been assigned CVE ID CVE-2014-0648.
  
  
  The RMI interface transports data over TCP port 2020 and TCP port 2030. The RMI interface is utilized for communication between Cisco ACS nodes in a distributed deployment environment.
  
  
  Cisco Secure ACS Operating System Command Injection Vulnerability
  
  A vulnerability in the web interface of Cisco Secure ACS could allow an authenticated, remote attacker to inject operating system-level commands.
  
  The vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by injecting operating system commands into a specific location of the ACS web interface. An exploit could allow the attacker to perform operating system-level commands without shell access, impacting the confidentiality, integrity, or availability of the system.
  
  This vulnerability is documented in Cisco bug ID CSCue65962 (registered customers only) and has been assigned CVE ID CVE-2014-0650.

Workarounds

• There are no configuration workarounds available for these vulnerabilities.
  
  Network-based mitigations for the RMI-based vulnerabilities are outlined in the Cisco Applied Mitigation Bulletin:
  
  Identifying and Mitigating the Multiple Vulnerabilities in Cisco Secure Access Control System

  http://tools.cisco.com/security/center/viewAMBAlert.x?alertId=32120

Fixed Software

• The following table provides first fixed release information for the Cisco Secure ACS release that are affected. The last row of the table gives information about the release version that includes the fix for all the vulnerabilities described in this advisory.

  	5.0	5.1	5.2	5.3	5.4
  Cisco Secure ACS RMI Privilege Escalation Vulernability	Migrate to 5.5 or later	Migrate to 5.5 or later	Migrate to 5.5 or later	Migrate to 5.5 or later	Migrate to 5.5
  Cisco Secure ACS RMI Unauthenticated User Access Vulnerability	Migrate to 5.5 or later	Migrate to 5.5 or later	Migrate to 5.5 or later	Migrate to 5.5 or later	Migrate to 5.5
  Cisco Secure ACS Operating System Command Injection Vulnerability	Migrate to 5.4 or later	Migrate to 5.4 or later	Migrate to 5.4 or later	Migrate to 5.4 or later	5.4 Patch 3
  First Fixed release for all vulnerabilities in this advisory					5.5

  When considering software upgrades, customers are advised to consult the Cisco Security Advisories, Responses, and Notices archive at http://www.cisco.com/go/psirt and review subsequent advisories to determine exposure and a complete upgrade solution.

  In all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers.

  Cisco Secure ACS 5.5 can be downloaded from the Software Center on Cisco.com by visiting http://www.cisco.com/cisco/software/navigator.html and navigating to Products > Security > Access Control and Policy > Policy and Access Management > Cisco Secure Access Control System > Cisco Secure Access Control System 5.5

Exploitation and Public Announcements

• The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory.

  These vulnerabilities were found during internal testing.

URL

• http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20140115-csacs

Revision History

• Revision 1.0

  2014-January-15

  Initial public release.

  Show Less