Title: CiscoSecure ACS For Windows Format String Vulnerability
Severity: CRITICAL
Description:
ACS is the commercial access control server distributed and maintained by Cisco Systems. This problem affects CiscoSecure ACS on the Microsoft Windows platform.
A problem has been discovered that may allow a remote user to gain elevated privileges on a vulnerable system. The problem is in the handling of format strings.
ACS does not properly handle user-supplied input. ACS is vulnerable to a format string attack which could allow the execution of arbitrary code. By sending a custom-crafted URL to port 2002 of a vulnerable server, it is possible to execute user-supplied code with the privileges of the ACS server.
By default, an ACS server for Microsoft Windows runs with SYSTEM privileges. Exploitation of this vulnerability yields administrative access on a vulnerable Windows system. This problem does not affect Unix systems.
Affected Products:
- Cisco Secure ACS for Windows NT 2.6.0
- Cisco Secure ACS for Windows NT 2.6.2
- Cisco Secure ACS for Windows NT 2.6.3
- Cisco Secure ACS for Windows NT 2.6.4
- Cisco Secure ACS for Windows NT 3.0.0
- Cisco Secure ACS for Windows NT 3.0.0 .1
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