Vulnerability Note VU#333636

Microsoft Server Service may disclose information used to store SMB traffic

Microsoft Server Service
The Microsoft Server service supports file, print, and named-pipe sharing over the network.

Server Message Block
Server Message Block (SMB) is a protocol used to share files and printers, and is the default file and print sharing service on supported versions of the Windows operating system.

There is an uninitialized buffer in the Server driver that may allow an attacker to view contents of the SMB buffers.

II. Impact

Note that per Microsoft, other protocols such as Internetwork Packet Exchange (IPX) and Sequenced Packet Exchange (SPX) could also be vulnerable to this issue.

III. Solution

Apply the patch supplied by Microsoft. See Microsoft Security Bulletin MS06-035 for details.

Restrict Access
Per Microsoft, restricting access to ports 139/tcp and 445/tcp to trusted hosts may prevent this vulnerability from being exploited.

Systems Affected

http://www.microsoft.com/technet/security/bulletin/ms06-035.mspx

Credit

Microsoft Security reported this issue. Microsoft credits Mike Price and Rafal Wojtczuk of McAfee Avert Labs with reporting information about this issue to them.

This document was written by Ryan Giobbi.

Other Information

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