Cisco Security Advisory
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AV:R/AC:L/Au:R/C:C/I:C/A:C/B:N/E:F/RL:O/RC:C
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Cisco Secure Access Control Server for Windows and Cisco Secure Access Control Server Solution Engine contain a vulnerability that could allow an authenticated, remote attacker to cause a denial of service (DoS) condition or execute arbitrary code.
The vulnerability exists due to insufficient input validation in the CSRadius service. An authenticated, remote attacker could exploit this vulnerability by submitting a malicious RADIUS Accounting-Request designed to cause a buffer overflow. This could allow the attacker to crash this service or execute arbitrary code with SYSTEM privileges.
Cisco has released a security advisory and released updated software.
To exploit this vulnerability, a remote attacker must have access to the RADIUS secret key. This should lower the pool of potential attackers. Exploitation could allow the attacker to execute arbitrary code with the privileges of the CSRadius service. This is the service used to provide communication between the CSAuth module and the device requesting authentication and authorization services.
If the attacker crashes the CSRadius service, all RADIUS authentication, authorization and accounting processing will cease to function. However, TACACS+ processing will continue to function.
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Cisco has released a security advisory to address Cisco bug ID CSCse18278 at the following link: cisco-sa-20070105-csacs
Vulnerable Products
Systems running the following Cisco products are vulnerable:
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Cisco Secure Access Control Server for Windows 3.1 and 3.2
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Cisco Secure Access Control Server for Windows prior to 3.3.4 build 12
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Cisco Secure Access Control Server for Windows prior to 4.0.1 build 27
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Cisco Secure Access Control Server Solution Engine 3.1 and 3.2
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Cisco Secure Access Control Server Solution Engine prior to 3.3.4 build 12
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Cisco Secure Access Control Server Solution Engine prior to 4.0.1 build 27
Products Confirmed Not Vulnerable
No other Cisco products are currently known to be affected by these vulnerabilities. -
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Administrators are advised to apply the appropriate update.
Administrators are advised to implement ACLs to restrict access to affected systems.
Administrators are advised to monitor affected systems for signs of suspicious activities.
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Cisco customers with active contracts can obtain updates through the Software Center at the following link: Cisco. Cisco customers without contracts can obtain upgrades by contacting the Cisco Technical Assistance Center at 1-800-553-2447 or 1-408-526-7209 or via e-mail at tac@cisco.com.
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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.
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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.
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Show LessVersion Description Section Status Date 1.0 Initial Release NA Final 2007-Jan-05
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