{"cve":"CVE-2013-6999","nvd":{"published":"2013-12-07T01:55:02.920","modified":"2026-06-17T00:01:15.297","status":"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.","cvss_v4":null,"cvss_v3":null,"cwes":[],"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"],"products":["microsoft:windows_server_2008"],"source":"nvd","synced_at":"2026-10-19T20:30:15.895642412+00:00"},"epss":{"cve":"CVE-2013-6999","score":0.01957,"percentile":0.80289,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}