search menu icon-carat-right cmu-wordmark

CERT Coordination Center

Microsoft Windows Vista CSRSS privilege escalation vulnerability

Vulnerability Note VU#219848

Original Release Date: 2007-04-10 | Last Revised: 2007-04-11


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


The Microsoft Client/Server Run-time Subsystem (CSRSS) is an essential subsystem. CSRSS is responsible for console windows and creating and deleting threads.

According to Microsoft Security Bulletin MS07-021:

A privilege elevation vulnerability exists in the way that the Windows 32 Client/Server Run-time Subsystem (CSRSS) handles its connections during the startup and stopping of processes.


A local authenticated attacker may be able to gain elevated privileges.


Apply update from Microsoft

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

Vendor Information

Affected   Unknown   Unaffected

Microsoft Corporation

Updated:  April 10, 2007



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.


See for more details.

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



Thanks to Microsoft for information that was used in this report. Microsoft credits eEye for reporting this vulnerability.

This document was written by Ryan Giobbi.

Other Information

CVE IDs: CVE-2007-1209
Severity Metric: 0.08
Date Public: 2007-04-10
Date First Published: 2007-04-10
Date Last Updated: 2007-04-11 17:42 UTC
Document Revision: 12

Sponsored by CISA.