Nortel Media Application Server cstore.exe cs_anams Remote Code Execution VulnerabilityZDI-11-260: August 16th, 2011
Media Application Server
TippingPoint™ IPS Customer ProtectionTippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 11580. For further product information on the TippingPoint IPS:
This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Nortel Media Application Server. Authentication is not required to exploit this vulnerability.
The flaw exists within the cstore.exe component which listens by default on TCP port 52005. When handling a CONTENT_STORE_ADMIN_REQ packet type the process trusts length value provided by the 'cs_anams' parameter and blindly copies user supplied data into a fixed-length buffer on the stack. A remote attacker can exploit this vulnerability to execute arbitrary code under the context of the SYSTEM user.
Vendor ResponseNortel has issued an update to correct this vulnerability. More details can be found at:
2011-02-17 - Vulnerability reported to vendor
2011-08-16 - Coordinated public release of advisory
CreditThis vulnerability was discovered by:
AbdulAziz Hariri of ThirdEyeTesters