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CVE-2013-6999

4.0 · MEDIUM

The IsHandleEntrySecure function in win32k.sys in the kernel-mode drivers in Microsoft Windows Server 2008 SP2 does not properly validate the tagPROCESSINFO pW32Job field, which allows local users…

Published Dec 7, 2013microsoftEPSS 1.96%

Overview

CVE-2013-6999 is a medium-severity vulnerability affecting microsoft windows_server_2008. It was published on December 7, 2013 and has a CVSS 2.0 base score of 4.0 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 4.0, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

The IsHandleEntrySecure function in win32k.sys in the kernel-mode drivers in Microsoft Windows Server 2008 SP2 does not properly validate the tagPROCESSINFO pW32Job field, which allows local users to cause a denial of service (NULL pointer dereference and system crash) via a crafted NtUserValidateHandleSecure call for an owned object. NOTE: the vendor reportedly disputes the significance of this report, stating that "it appears to be a local DOS ... we don't consider it a security vulnerability.

Remediation

Check the references section for vendor advisories and patches from microsoft. Update windows_server_2008 to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus

References

Refpastebin.com/raw.php?i=we0ZSQC0Refsecunia.com/advisories/55633Refwww.securityfocus.com/bid/64057Refpastebin.com/raw.php?i=we0ZSQC0Refsecunia.com/advisories/55633Refwww.securityfocus.com/bid/64057

How CyberStrike helps

Frequently asked questions

What is CVE-2013-6999?

CVE-2013-6999 is a medium-severity vulnerability affecting microsoft windows_server_2008. It was published on December 7, 2013 and has a CVSS 2.0 base score of 4.0 (MEDIUM).

How severe is CVE-2013-6999?

This vulnerability has a CVSS 2.0 base score of 4.0, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2013-6999?

Check the references section for vendor advisories and patches from microsoft. Update windows_server_2008 to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2013-6999?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2013-6999 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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