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Cisco Secure Access Control Server Accounting-Request Buffer Overflow Vulnerability

Cisco-SA-20070105-CVE-2006-4098 · Medium · Published · Updated

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.

Cisco advisory · CSAF JSON

Workarounds

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.

CVEsCVE-2006-4098
Cisco Bug IDsNA
CVSS ScoreBase 6.0
Product Names From Source
Cisco Secure Access Control Server (ACS) for Windows, Cisco Secure Access Control Server Solution Engine (ACSE)

Related Products

Product CVE Evidence
Cisco Secure Access Control Server Solution Engine (ACSE) CVE-2006-4098 Cisco OpenVuln
Cisco Secure Access Control Server (ACS) for Windows CVE-2006-4098 Cisco OpenVuln