Microsoft Security Advisory (2269637)
Insecure Library Loading Could Allow Remote Code Execution
- http://www.microsoft...ry/2269637.mspx
"...Workarounds:
• Disable loading of libraries from WebDAV and remote network shares...
• Disable the WebClient service...
• Block TCP ports 139 and 445 at the firewall...
(See "Impact of workaround" for each one)..."
• V1.1 (August 31, 2010) Added a link to Microsoft Knowledge Base Article 2264107* to provide an automated Microsoft Fix it solution for the workaround, Disable loading of libraries from WebDAV and remote network shares.
* http://support.micro....com/kb/2264107
August 31, 2010 - Revision: 4.0
MS SRD - Update on the DLL-preloading remote attack vector
- http://blogs.technet...ack-vector.aspx
31 Aug 2010 - "... Note: The Fix-it itself does not install the workaround tool. You’ll need to separately download and install the tool beforehand.
To instead completely block all DLL-preloading attack vectors, including the threat of malicious files on a USB thumb drive or files arriving via email as a ZIP attachment, set CWDIllegalInDllSearch to 0xFFFFFFFF. This will address any DLL preloading vulnerabilities that may exist in applications running on your system. However, it may have some unintended consequences for applications that require this behavior, so we do recommend thorough testing..."
- http://go.microsoft....?linkid=9742148
- http://techblog.avir...erabilities/en/
September 2, 2010 - "... the company released a Fix-it tool which can be executed after the patch has been applied. It lessens the restrictions introduced by the patch so that most applications do work again. Windows then still blocks loading DLLs from network shares or WebDAV, but if a malicious DLL is located within a local working directory, an attack may still succeed..."
Verified Secunia List:
- http://secunia.com/a...ibrary_loading/
(tables are automatically updated as Secunia issues new advisories)
Number of products affected...
Number of vendors affected...
Number of Secunia Advisories issued...
Edited by AplusWebMaster, 18 October 2010 - 02:55 PM.