Sophos Free Encryption 'pcrypt0406.dll' DLL Loading Arbitrary Code Execution Vulnerability

Bugtraq ID:	42884
Class:	Design Error
CVE:
Remote:	Yes
Local:	No
Published:	Aug 31 2010 12:00AM
Updated:	Aug 31 2010 12:00AM
Credit:	Parvez Anwar
Vulnerable:	Sophos Sophos Free Encryption 2.40.1.1
Not Vulnerable:

Sophos Free Encryption 'pcrypt0406.dll' DLL Loading Arbitrary Code Execution Vulnerability

Sophos Free Encryption is prone to a vulnerability that lets attackers execute arbitrary code.

An attacker can exploit this issue by enticing a legitimate user to use the vulnerable application to open a file from a network share location that contains a specially crafted Dynamic Link Library (DLL) file.

Sophos Free Encryption 2.40.1.1 is vulnerable; other versions may also be affected.

Sophos Free Encryption 'pcrypt0406.dll' DLL Loading Arbitrary Code Execution Vulnerability

Attackers must trick a user into opening a file on a remote WebDAV or SMB share to exploit this issue.

A general exploit technique has been documented by TheLeader and H.D. Moore for the Metasploit Project; please see the references for more information.

Sophos Free Encryption 'pcrypt0406.dll' DLL Loading Arbitrary Code Execution Vulnerability

Solution:
Currently we are not aware of any vendor-supplied patches. If you feel we are in error or if you are aware of more recent information, please mail us at: [email protected].

Sophos Free Encryption 'pcrypt0406.dll' DLL Loading Arbitrary Code Execution Vulnerability

References:

• Application DLL Load Hijacking (HD Moore)
  
• Exploiting DLL Hijacking Flaws (hdm)
  
• Microsoft Security Advisory 2269637 Released (Microsoft)
  
• More information about the DLL Preloading remote attack vector (Microsoft)
  
• Sophos Free Encryption Product Page (Sophos)
  
• Microsoft Security Advisory (2269637) (Microsoft)