Microsoft Visual Basic for Applications DLL Loading Arbitrary Code Execution Vulnerability

Bugtraq ID:	54303
Class:	Design Error
CVE:	CVE-2012-1854
Remote:	Yes
Local:	No
Published:	Jul 10 2012 12:00AM
Updated:	Jul 10 2012 12:00AM
Credit:	Microsoft
Vulnerable:	Microsoft Visual Basic for Applications 0 - Microsoft Windows NT 4.0 - Microsoft Windows NT 4.0 Microsoft Office 2010 (64-bit edition) SP1 Microsoft Office 2010 (64-bit edition) 0 Microsoft Office 2010 (32-bit edition) 0 Microsoft Office 2010 (32-bit edition) SP1 Microsoft Office 2003 SP3
Not Vulnerable:

Microsoft Visual Basic for Applications DLL Loading Arbitrary Code Execution Vulnerability

Microsoft Visual Basic for Applications 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 which contains a specially crafted Dynamic Link Library (DLL) file.

Successful exploits will compromise the application in the context of the currently logged-in user.

Microsoft Visual Basic for Applications 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.

Microsoft Visual Basic for Applications DLL Loading Arbitrary Code Execution Vulnerability

Solution:
The vendor has released an advisory and updates. Please see the references for details.

Microsoft Visual Basic for Applications DLL Loading Arbitrary Code Execution Vulnerability

References:

• Application DLL Load Hijacking (HD Moore)
  
• Exploiting DLL Hijacking Flaws (hdm)
  
• Microsoft Homepage (Microsoft)
  
• More information about the DLL Preloading remote attack vector (Microsoft)