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Vulnerability Note VU#778036

Microsoft Workstation Service fails to properly parse malformed network messages

Overview

A vulnerability in the way Microsoft Workstation Service parses malformed network messages may lead to execution of arbitrary code.

I. Description

Microsoft Workstation Service contains a vulnerability that could be exploited when Workstation Service attempts to parse specially crafted network messages. According to Microsoft Security Bulletin MS06-070:

    On Windows 2000 Service Pack 4 any anonymous user who could deliver a specially crafted message to the affected system could try to exploit this vulnerability. On Windows XP Service Pack 2 the attack could only be successfully performed by a user with Administrator privileges.

Please note that exploit code for this vulnerability is publicly available.

II. Impact

A remote, unauthenticated attacker may be able to execute arbitrary code or cause a denial-of-service condition.

III. Solution

Update

Microsoft has released an update to address this issue. See Microsoft Security Bulletin MS06-070 for more details.

Workarounds

In addition to the patches referred to above, Microsoft Security Bulletin MS06-070 also contains a number of workarounds for this issue. Users, particularly those who are unable to apply the patches are encouraged to implement these workarounds.

Systems Affected

VendorStatusDate NotifiedDate Updated
Microsoft CorporationVulnerable14-Nov-2006

References


http://www.microsoft.com/technet/security/bulletin/ms06-070.mspx
http://research.eeye.com/html/advisories/published/AD20061114.html

Credit

This vulnerability was reported in Microsoft Security Bulletin MS06-070. Microsoft credits eEye for reporting this issue.

This document was written by Chris Taschner.

Other Information

Date Public:2006-11-14
Date First Published:2006-11-15
Date Last Updated:2006-11-21
CERT Advisory: 
CVE-ID(s):CVE-2006-4691
NVD-ID(s):CVE-2006-4691
US-CERT Technical Alerts: 
Metric:18.63
Document Revision:18

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