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Microsoft Server Service fails to properly handle network messages

Vulnerability Note VU#820628

Original Release Date: 2006-10-11 | Last Revised: 2006-10-11


A vulnerability in the way Microsoft Server Service handles network messages may lead to execution of arbitrary code.


Microsoft Server Service provides support for Remote Proceedure Call (RPC), resource sharing, and named pipe communication over the network. Microsoft Server Service may attempt to derefernce an invalid pointer when handling network messages. According to Microsoft Security Bulletin MS06-063:

An attacker could try to exploit the vulnerability by creating a specially crafted message and sending the message to an affected system.
In order to exploit this vulnerability an attacker must be authenticated on the affected network.


An authenticated attacker may be able to execute arbitrary code or cause a denial of service condition.


Microsoft has released an update to address this issue. See Microsoft Security Bulletin MS06-063 for more details.

Restrict Access

Block the following ports as discribed by Microsoft Security Bulletin MS06-063:

    • UDP ports 135, 137, 138, and 445
    • TCP ports 135, 139, 445, and 593

Vendor Information


Microsoft Corporation Affected

Updated:  October 11, 2006



Vendor Statement

We have not received a statement from the vendor.

Vendor Information

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


Refer to Microsoft Security Bulletin MS06-063.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

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This vulnerability was reported in Microsoft Security Bulletin MS06-063. Microsoft credits Fortinet and Matthew Amdur of VMWare for reporting this issue.

This document was written by Chris Taschner.

Other Information

CVE IDs: CVE-2006-4696
Severity Metric: 12.66
Date Public: 2006-10-10
Date First Published: 2006-10-11
Date Last Updated: 2006-10-11 14:39 UTC
Document Revision: 7

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