CVE-2013-6999 — MEDIUM (4.0)

Vulnerability 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.

CVSS Score

4.0

MEDIUM

AV:L/AC:H/Au:N/C:N/I:N/A:C

Confidentiality

NONE

Integrity

NONE

Availability

COMPLETE

Affected Products

Vendor	Product	Versions
Microsoft	Windows Server 2008	All versions

References

http://pastebin.com/raw.php?i=we0ZSQC0Exploit
http://secunia.com/advisories/55633Vendor Advisory
http://www.securityfocus.com/bid/64057
http://pastebin.com/raw.php?i=we0ZSQC0Exploit
http://secunia.com/advisories/55633Vendor Advisory
http://www.securityfocus.com/bid/64057

FAQ

What is CVE-2013-6999?

CVE-2013-6999 is a vulnerability with a CVSS score of 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 to ...

How severe is CVE-2013-6999?

CVE-2013-6999 has been rated MEDIUM with a CVSS base score of 4.0/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2013-6999?

Check the references section above for vendor advisories and patch information. Affected products include: Microsoft Windows Server 2008.