TippingPoint Zero Day Initiative

Sophos Anti-Virus CPIO Archive Parsing Buffer Overflow Vulnerability

ZDI-06-045: December 12th, 2006


Affected Vendors

Affected Products

TippingPoint™ IPS Customer Protection

TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 4918. For further product information on the TippingPoint IPS:

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Sophos Anti-Virus.

The specific flaw exists in the parsing of CPIO archives. When a long non-null terminated filename is processed by veex.dll, a stack overflow occurs. Exploitation is possible leading to remote code execution running under the SYSTEM context.

Vendor Response

Sophos has issued an update to correct this vulnerability. More details can be found at:

Disclosure Timeline

    2006-09-14 - Vulnerability reported to vendor
    2006-12-12 - Coordinated public release of advisory


This vulnerability was discovered by: