Advisory Details

August 16th, 2011

Nortel Media Application Server cstore.exe cs_anams Remote Code Execution Vulnerability

ZDI-11-260
ZDI-CAN-1096

CVE ID
CVSS SCORE 10, (AV:N/AC:L/Au:N/C:C/I:C/A:C)
AFFECTED VENDORS Nortel
AFFECTED PRODUCTS Media Application Server
TREND MICRO CUSTOMER PROTECTION Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 11580. For further product information on the TippingPoint IPS: http://www.tippingpoint.com
VULNERABILITY DETAILS

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.

ADDITIONAL DETAILS Nortel has issued an update to correct this vulnerability. More details can be found at:
https://support.avaya.com/css/P8/documents/100146108
DISCLOSURE TIMELINE
  • 2011-02-17 - Vulnerability reported to vendor
  • 2011-08-16 - Coordinated public release of advisory
CREDIT AbdulAziz Hariri of ThirdEyeTesters
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