CVE-2013-6999
CVE-2013-6999 is a medium-severity vulnerability in Microsoft Windows Server 2008 with a CVSS 2.0 base score of 4.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.
Key facts
- Severity: Medium (CVSS 2.0 base score 4.0)
- EPSS exploit prediction: 2% (78th percentile)
- Actively exploited: Not listed in CISA KEV
- Affected product: Microsoft Windows Server 2008
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2013-6999?
- 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.
- How severe is CVE-2013-6999?
- CVE-2013-6999 has a CVSS 2.0 base score of 4.0, rated medium severity.
- Is CVE-2013-6999 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2013-6999?
- CVE-2013-6999 affects Microsoft Windows Server 2008. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2013-6999?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2013-6999 published?
- CVE-2013-6999 was published on 2013-12-07 and last updated on 2026-06-17.
References
- http://pastebin.com/raw.php?i=we0ZSQC0
- http://secunia.com/advisories/55633
- http://www.securityfocus.com/bid/64057
Affected products (1)
- cpe:2.3:o:microsoft:windows_server_2008:*:sp2:*:*:*:*:*:*
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