Microsoft Windows Vista CSRSS privilege escalation vulnerability

Overview

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.

Description

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.

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Impact

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

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Solution

Apply update from Microsoft

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

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Vendor Information

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Updated: April 10, 2007

Status

Affected

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.

Addendum

See <http://www.microsoft.com/technet/security/bulletin/ms07-021.mspx&gt; for more details.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23219848 Feedback>).

CVSS Metrics

Group	Score	Vector
Base
Temporal
Environmental

References

<http://www.microsoft.com/technet/security/bulletin/ms07-021.mspx&gt;

Acknowledgements

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: