CVE-2013-6999

Public Exploit

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.

4.0

CVSS

Severity: Medium

CVSS 2.0 •

EPSS 0.53%

Vendor Advisory secunia.com

Affected: n/a n/a

References

Link	Tags
http://www.securityfocus.com/bid/64057	vdb entry
http://pastebin.com/raw.php?i=we0ZSQC0	exploit
http://secunia.com/advisories/55633	third party advisory vendor advisory

Frequently Asked Questions

What is the severity of CVE-2013-6999?: CVE-2013-6999 has been scored as a medium severity vulnerability.
How to fix CVE-2013-6999?: To fix CVE-2013-6999, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2013-6999 being actively exploited in the wild?: It is possible that CVE-2013-6999 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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