search menu icon-carat-right cmu-wordmark

CERT Coordination Center

Microsoft Windows CSRSS error handling vulnerability

Vulnerability Note VU#740636

Original Release Date: 2007-04-11 | Last Revised: 2007-04-11

Overview

The Microsoft Windows Client/Server Run-time Subsystem (CSRSS) process fails to properly handle error messages. This vulnerability may allow a remote attacker to execute arbitrary code.

Description

According to Microsoft Security Bulletin MS07-021:

CSRSS is the user-mode portion of the Win32 subsystem. CSRSS stands for client/server run-time subsystem and is an essential subsystem that must be running at all times. CSRSS is responsible for console windows, creating and/or deleting threads.
The CSRSS process fails to properly handle error messages possibly allowing a double free vulnerability to occur.

More information is available in Microsoft Security Bulletin MS07-021.

Note that proof-of-concept code is available for this vulnerability.

Impact

A remote attacker may be able to execute arbitrary code on a vulnerable system.

Solution

Apply update from Microsoft
Microsoft has released an update for this vulnerability in Microsoft Security Bulletin MS07-021.

Vendor Information

740636
 
Affected   Unknown   Unaffected

Microsoft Corporation

Updated:  April 10, 2007

Status

  Vulnerable

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

Addendum

Refer to http://www.microsoft.com/technet/security/bulletin/ms07-021.mspx.

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


CVSS Metrics

Group Score Vector
Base N/A N/A
Temporal N/A N/A
Environmental N/A

References

Acknowledgements

This vulnerability was reported by Tim Garnett of Determina Security Research .

This document was written by Jeff Gennari.

Other Information

CVE IDs: CVE-2006-6797
Severity Metric: 7.44
Date Public: 2006-12-15
Date First Published: 2007-04-11
Date Last Updated: 2007-04-11 10:50 UTC
Document Revision: 12

Sponsored by CISA.