TippingPoint Zero Day Initiative

Sophos Anti-Virus CAB Unpacking Code Execution Vulnerability

ZDI-06-012: May 8th, 2006

CVE ID

Affected Vendors

Affected Products

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Sophos AntiVirus. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the unpacking of Microsoft Cabinet files that contain invalid folder count values within the CAB header. Parsing of a specially crafted cabinet file can lead to an exploitable heap corruption. This vulnerability is only exposed when cabinet file inspection is explicitly enabled.

Vendor Response

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

Disclosure Timeline

    2006-03-20 - Vulnerability reported to vendor
    2006-05-08 - Coordinated public release of advisory

Credit

This vulnerability was discovered by:
    Anonymous