PT-2011-26: Multiple Cross-Site Request Forgery and "Stored XSS" Vulnerabilities in Cisco ACS

Vulnerable platform

Cisco ACS
Version: 5.2.0.26 and earlier, 5.3.0.40 and earlier

Link:
http://www.cisco.com/en/US/products/sw/secursw/ps2086/index.html

Severity level

Severity level: Medium        
Impact: Cross-Site Request Forgery
Access Vector: Network exploitable

CVSS v2:
Base Score: 6.8 
Vector: (AV:N/AC:M/Au:N/C:P/I:P/A:P)

CVE: CVE-2011-3293

Platform description

Cisco Secure Access Control Server (ACS) is an access policy control platform.

Vulnerability description

Positive Research Center has discovered multiple Cross-Site Request Forgery and "stored XSS" Vulnerabilities in Cisco ACS.

Forms do not provide protection against CSRF attacks. One can create a spoofing web form and trick the Cisco ACS administrator into submitting it. If the administrator already logged in to the Cisco ACS web interface, this may result in changing the ACS configuration. Moreover, requests of this type can be generated by spoofing a web page implicitly through a browser plug-in (e.g. Flash, Silverlight, or Java applet). In this case, the intruder has to trick the administrator into navigating through the spoofing page containing an exploit.

The details are not disclosed by agreement with the Cisco company.

How to fix

We recommend that you download the latest cumulative patch. The patches for users with service contracts are available through their regular update channels (in most cases, through the Software Center on Cisco's worldwide website at http://www.cisco.com).

Users whose Cisco products are provided or maintained through agreements with third-party support organizations should contact that support organization for guidance and assistance.

Fixed software can also be obtained via the Cisco Technical Assistance Center (TAC). Refer to http://www.cisco.com/en/US/support/tsd_cisco_worldwide_contacts.html for additional TAC contact information.

Advisory status

19.07.2011 - Vendor is notified
19.07.2011 - Vendor gets vulnerability details
13.02.2012 - Vendor releases fixed version and details
20.02.2012 - Public disclosure

Credits

The vulnerability was discovered by Maxim Tsoy, Positive Research Center (Positive Technologies Company)

References

http://en.securitylab.ru/lab/PT-2011-26

Reports on the vulnerabilities previously discovered by Positive Research:

http://www.ptsecurity.com/advisory1.aspx
http://en.securitylab.ru/lab/