Vulnerability Team

A service policy bypass vulnerability exists in the Cisco Content Services Gateway - Second Generation (CSG2), which runs on the Cisco Service and Application Module for IP (SAMI). Under certain configurations this vulnerability could allow:

* Customers to access sites that would normally match a billing policy to be accessed without being charged to the end customer
* Customers to access sites that would normally be denied based on configured restriction policies

Additionally, Cisco IOS Software Release 12.4(24)MD1 on the Cisco CSG2 contains two vulnerabilities that can be exploited by a remote, unauthenticated attacker to create a denial of service condition that prevents traffic from passing through the CSG2. These vulnerabilities require only a single content service to be active on the Cisco CSG2 and can be exploited via crafted TCP packets. A three-way handshake is not required to exploit either of these vulnerabilities.

Cisco Content Services Gateway Vulnerabilities

Workarounds that mitigate these vulnerabilities are not available.

Cisco Security Advisory

fuente: cisco.com

Cisco Content Services Gateway Malformed TCP Packet (CVE-2011-0350) Denial of Service Vulnerability
Cisco Content Services Gateway is prone to a denial-of-service vulnerability. Successful exploits will cause the affected device to reload or hang, denying service to legitimate users. This issue is being tracked by Cisco Bug ID CSCth41891.

Cisco Content Services Gateway Service Policy Security Bypass Vulnerability
Cisco Content Services Gateway is prone to a security-bypass vulnerability. Exploiting this issue may allow attackers to access sites that are non-accounted or billed. This may lead to other attacks. This issue is being tracked by Cisco Bug ID CSCtk35917.

Desde Vulnerability Team exortamos a los usuarios y administradores revisar las notificaciones y aplicar las actualizaciones necesarias, para ayudar a mitigar los riesgos.

fuente: securityfocus.com