What’s Vulnerable › Vulnerabilities

CVE-2013-3661

• Severity: medium (CVSS 4.9 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2013-05-24 · updated 2026-06-16
• Weakness: CWE-22

Description

The EPATHOBJ::bFlatten function in win32k.sys in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows Server 2012, and Windows RT does not check whether linked-list traversal is continually accessing the same list member, which allows local users to cause a denial of service (infinite traversal) via vectors that trigger a crafted PATHRECORD chain.

Affected products

• Microsoft Windows 7: all versions
• Microsoft Windows 8: all versions
• Microsoft Windows Rt: all versions
• Microsoft Windows Server 2003: all versions
• Microsoft Windows Server 2008: r2-sp1
• Microsoft Windows Server 2012: all versions
• Microsoft Windows Vista: all versions
• Microsoft Windows XP Service Pack 3: all versions

References

• http://archives.neohapsis.com/archives/fulldisclosure/2013-05/0094.html
• http://archives.neohapsis.com/archives/fulldisclosure/2013-06/0006.html
• http://secunia.com/advisories/53435
• http://twitter.com/taviso/statuses/335557286657400832
• http://www.computerworld.com/s/article/9239477
• http://www.exploit-db.com/exploits/25611/
• http://www.osvdb.org/93539
• http://www.reddit.com/r/netsec/comments/1eqh66/0day_windows_kernel_epathobj_vulnerability/
• http://www.theverge.com/2013/5/23/4358400/google-engineer-bashes-microsoft-discloses-windows-flaw
• http://archives.neohapsis.com/archives/fulldisclosure/2013-05/0094.html
• http://archives.neohapsis.com/archives/fulldisclosure/2013-06/0006.html
• http://secunia.com/advisories/53435

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