Microsoft Server Service may disclose information used to store SMB traffic

Overview

A vulnerability in the Microsoft Server service may allow an attacker to view fragments of memory used to store SMB traffic.

Description

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.

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Impact

This vulnerability may result in information being disclosed that would aid in launching other attacks on the affected system. An attacker could not exploit this vulnerability to run arbitrary code.

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

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Solution

Apply a Patch from the Vendor

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

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

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Vendor Information

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Microsoft Corporation __ Unknown

Notified: July 11, 2006 Updated: July 19, 2006

Status

Unknown

Vendor Statement

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

See Microsoft Security Bulletin MS06-035 for more details.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23333636 Feedback>).

CVSS Metrics

Group	Score	Vector
Base
Temporal
Environmental

References

<http://www.microsoft.com/technet/security/bulletin/ms06-035.mspx&gt;

Acknowledgements

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

CVE IDs:	CVE-2006-1315
Severity Metric:	0.39 Date Public: