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Cisco Security Advisory

Cisco Network Admission Control Manager SQL Injection Vulnerability

Advisory ID: cisco-sa-20130417-nac

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20130417-nac

Revision 1.0

For Public Release 2013 April 17 16:00  UTC (GMT)


Summary

Cisco Network Admission Control (NAC) Manager contains a vulnerability that could allow an unauthenticated remote attacker to execute arbitrary code and take full control of the vulnerable system. A successful attack could allow an unauthenticated attacker to access, create or modify any information in the NAC Manager database. 

Cisco has released free software updates that address this vulnerability. 

There are no workarounds for this vulnerability.

This advisory is available at the following link: http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20130417-nac

Affected Products


Vulnerable Products

Cisco NAC Manager versions prior to the following are affected by this vulnerability:

  • 4.9.2
  • 4.8.3.1

The software version of a NAC Manager system can be determined by navigating to Administration > CCA Manager > Software Upload | Current Version via the administration interface.

The software version can also be determined by running the command cat /perfigo/build in the command-line interface (CLI).

The following example shows a system running affected version (4.9.1) of the software:

[root@nacmanager ~]# cat /perfigo/build 
VERSION=4.9.1
NAME=Clean Access Manager.


Note: 
Cisco NAC Manager is part of the Cisco NAC Appliance, formerly known as Cisco Clean Access. Software versions 4.1.3 and later are using the name Cisco Network Admission Control (NAC).



Products Confirmed Not Vulnerable

With the exception of Cisco NAC Manager no other Cisco products are known to be affected by this vulnerability.

Note: The Cisco NAC Server and NAC Agent components of the Cisco NAC Appliance are not affected by this vulnerability.

Details

The Cisco NAC Appliance solution allows network administrators to authenticate, authorize, evaluate, and remediate wired, wireless, and remote users and their machines prior to allowing users onto the network. The solution identifies whether machines are compliant with security policies and repairs vulnerabilities before permitting access to the network.

Cisco NAC Manager contains a vulnerability that could allow an unauthenticated remote attacker to execute arbitrary code and take full control of the vulnerable system.

This vulnerability is due to improper validation of user-supplied requests by the Cisco NAC Manager. An attacker could exploit this vulnerability by injecting Structured Query Language (SQL) commands. An exploit could allow the attacker to execute arbitrary queries and take full control of the affected system.

This vulnerability is documented in CSCub23095 (registered customers only) and has been assigned Common Vulnerabilities and Exposures (CVE) identifier CVE-2013-1177.

Vulnerability Scoring Details

Cisco has scored the vulnerability in this advisory based on the Common Vulnerability Scoring System (CVSS). The CVSS scoring in this security advisory is in accordance with CVSS version 2.0.

CVSS is a standards-based scoring method that conveys vulnerability severity and helps organizations determine the urgency and priority of a response.

Cisco has provided a base and temporal score. Customers can also compute environmental scores that help determine the impact of the vulnerability in their own networks.

Cisco has provided additional information regarding CVSS at the following link:

http://www.cisco.com/web/about/security/intelligence/cvss-qandas.html

Cisco has also provided a CVSS calculator to compute the environmental impact for individual networks at the following link:

http://intellishield.cisco.com/security/alertmanager/cvss


CSCub23095-- Cisco NAC Manager SQL Injection Vulnerability

Calculate the environmental score of CSCub23095

CVSS Base Score - 10.0

Access Vector

Access Complexity

Authentication

Confidentiality Impact

Integrity Impact

Availability Impact

Network

Low

None

Complete

Complete

Complete

CVSS Temporal Score - 8.3

Exploitability

Remediation Level

Report Confidence

Functional

Official-Fix

Confirmed


Impact

Successful exploitation of the vulnerability could allow the attacker to execute arbitrary queries on the Cisco NAC Manager and take full control of the affected system. 
A successful attack could allow an unauthenticated attacker to access, create or modify information such as usernames and password hashes in the NAC Manager database. A successful attack also has the potential to create, modify, or delete arbitrary and system files and to copy sensitive information from the vulnerable device.

Software Versions and Fixes

When considering software upgrades, customers are advised to consult the Cisco Security Advisories and Responses 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.

This vulnerability has been fixed in NAC Manager versions 4.9.2, 4.8.3.1 and later.


Cisco NAC Manager can be downloaded at the following link:

http://software.cisco.com/download/navigator.html?mdfid=279515766&i=rm



Workarounds

There are no workarounds for the vulnerability described in this document.

Obtaining Fixed Software

Cisco has released free software updates that address the vulnerability described in this advisory. Prior to deploying software, customers are advised to consult their maintenance providers or check the software for feature set compatibility and known issues that are specific to their environments.

Customers may only install and expect support for feature sets they have purchased. By installing, downloading, accessing, or otherwise using such software upgrades, customers agree to follow the terms of the Cisco software license at http://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.html.

Customers with Service Contracts

Customers with contracts should obtain upgraded software through their regular update channels. For most customers, upgrades should be obtained through the Software Navigator on Cisco.com at http://www.cisco.com/cisco/software/navigator.html.

Customers Using Third-Party Support Organizations

Customers with Cisco products that are provided or maintained through prior or existing agreements with third-party support organizations, such as Cisco Partners, authorized resellers, or service providers, should contact that organization for assistance with the appropriate course of action.

The effectiveness of any workaround or fix depends on specific customer situations, such as product mix, network topology, traffic behavior, and organizational mission. Because of the variety of affected products and releases, customers should consult their service providers or support organizations to ensure that any applied workaround or fix is the most appropriate in the intended network before it is deployed.

Customers Without Service Contracts

Customers who purchase directly from Cisco but do not hold a Cisco service contract and customers who make purchases through third-party vendors but are unsuccessful in obtaining fixed software through their point of sale should obtain upgrades by contacting the Cisco Technical Assistance Center (TAC):

  • +1 800 553 2447 (toll free from within North America)
  • +1 408 526 7209 (toll call from anywhere in the world)
  • e-mail: tac@cisco.com

Customers should have the product serial number available and be prepared to provide the URL of this advisory as evidence of entitlement to a free upgrade. Customers without service contracts should request free upgrades through the TAC.

Refer to Cisco Worldwide Contacts at http://www.cisco.com/en/US/support/tsd_cisco_worldwide_contacts.html for additional TAC contact information, including localized telephone numbers, instructions, and e-mail addresses for support in various languages.

Exploitation and Public Announcements

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

This vulnerability was found by Nenad Stojanovski and reported to Cisco by ZDI.

Status of This Notice: Final

THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.

A stand-alone copy or Paraphrase of the text of this document that omits the distribution URL in the following section is an uncontrolled copy, and may lack important information or contain factual errors.


Distribution

This advisory is posted on Cisco Security Intelligence Operations at the following link:

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20130417-nac

Additionally, a text version of this advisory is clear signed with the Cisco PSIRT PGP key and circulated among the following e-mail addresses:

  • cust-security-announce@cisco.com
  • first-bulletins@lists.first.org
  • bugtraq@securityfocus.com
  • vulnwatch@vulnwatch.org
  • cisco@spot.colorado.edu
  • cisco-nsp@puck.nether.net
  • full-disclosure@lists.grok.org.uk

Future updates of this advisory, if any, will reside on Cisco.com but may not be announced on mailing lists. Users can monitor this advisory's URL for any updates.


Revision History

Revision 1.0 2013-April-17 Initial public release

Cisco Security Procedures

Complete information about reporting security vulnerabilities in Cisco products, obtaining assistance with security incidents, and registering to receive security information from Cisco is available on Cisco.com at http://www.cisco.com/web/about/security/psirt/security_vulnerability_policy.html. This web page includes instructions for press inquiries regarding Cisco Security Advisories. All Cisco Security Advisories are available at http://www.cisco.com/go/psirt.


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