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X.Org X11 "DBE" and "Render" Extensions Vulnerabilities

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Release Date:  2007-01-10    Views:  17,183

Secunia Advisory SA23670

Where:

Local system

Impact:

Privilege escalation

Solution Status:

Vendor Patch

CVE Reference(s):

Description


Sean Larsson has reported some vulnerabilities in X.Org X11, which can be exploited by malicious, local users to gain escalated privileges.

The vulnerabilities are caused due to input validation errors within the "ProcRenderAddGlyphs()" function of the "Render" extension, and the "ProcDbeGetVisualInfo()" and "ProcDbeSwapBuffers()" functions of the "DBE" extension. This can be exploited to cause memory corruption by sending specially crafted X requests to the X server.

Successful exploitation may allow the execution of arbitrary code with the privileges of the X server, but requires that the "Render" or "DBE" extensions are loaded.

The vulnerabilities are reported in version 7.1-1.1.0. Other versions may also be affected.


Solution:
Update to version 7.2 RC3.

Provided and/or discovered by:
Sean Larsson, iDefense Labs

Original Advisory:
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=463
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=464
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=465

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: X.Org X11 "DBE" and "Render" Extensions Vulnerabilities

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