Vulnerability Note VU#793233

Microsoft Windows Internet Printing Protocol service integer overflow

The Microsoft Windows IPP component, which is provided by msw3prt.dll, contains an integer overflow vulnerability that results in an overflow of heap memory. By creating a specific HTTP POST to the vulnerable server, the IPP server will attempt to make an SMB connection to a printer that is specified by the attacker. If this printer returns a malformed JOB_INFO_2 structure, the integer overflow vulnerability in IPP may be triggered, resulting in a four-byte memory overwrite and eventually code execution on the IPP server.

This vulnerability is being exploited in the wild.

II. Impact

This issue is addressed in Microsoft Security Bulletin MS08-062. Additional workarounds are provided in the bulletin as well.

Block outbound SMB traffic
This and other vulnerabilities may be mitigated by blocking outbound SMB traffic from your network to the internet.

Systems Affected

http://www.microsoft.com/technet/security/bulletin/ms08-062.mspx
http://msdn.microsoft.com/en-us/library/ms817904.aspx
http://msdn.microsoft.com/en-us/library/ms535671(VS.85).aspx
http://secunia.com/advisories/32248/

Credit

This document was written by Will Dormann.

Other Information

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