CVE-2013-6999

Severity: medium (CVSS 4.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.0% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2013-12-07 · updated 2026-06-17

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.

Affected products

Microsoft Windows Server 2008: all versions

References

http://pastebin.com/raw.php?i=we0ZSQC0
http://secunia.com/advisories/55633
http://www.securityfocus.com/bid/64057
http://pastebin.com/raw.php?i=we0ZSQC0
http://secunia.com/advisories/55633
http://www.securityfocus.com/bid/64057

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