Intrusion Prevention

Sophos.AV.RAR.VMSF.RGB.Filter.Parsing.Remote.Code.Execution

Description

This indicates an attack attempt to exploit an Integer Underflow vulnerability in Sophos Anti-Virus.
The vulnerability is due to an error when the vulnerable software handles a maliciously crafted RAR file. A remote attacker may be able to exploit this to execute arbitrary code within the context of the application, via a crafted RAR file.

Affected Products

Sophos Anti-Virus for Windows prior to version 10.2.0
Sophos Anti-Virus for Mac prior to version 8.0.8
Sophos Anti-Virus for Linux/UNIX prior to version 9.0.0

Impact

System Compromise: Remote attackers can gain control of vulnerable systems.

Recommended Actions

Apply the most recent upgrade or patch from the vendor.
http://www.sophos.com/en-us/support/knowledgebase/118424.aspx#five