CVE-2013-3661
The EPATHOBJ::bFlatten function in win32k.sys in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP2, Windows…
- 4.9MediumCVSS base score
- 3.9%Exploitation in 30 daysEPSS · top 9.7% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- 3Public exploitsMetasploit, Nuclei and Exploit-DB
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.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. The public collections list 3 Exploit-DB entries for it. A reference of the record is tagged as an exploit.
Show the exploits4
Exploit-DB3 entries
- Microsoft Windows - 'EPATHOBJ::pprFlattenRec' Local Privilege Escalation (Metasploit) (Exploit-DB entry) (opens in a new tab)
EDB-ID 26554local, windowspublished 2 Jul 2013Verified
- Microsoft Windows NT/2000/2003/2008/XP/Vista/7/8 - 'EPATHOBJ' Local Ring (Exploit-DB entry) (opens in a new tab)
EDB-ID 25912local, windowspublished 3 Jun 2013Verified
- Microsoft Windows - Win32k!EPATHOBJ::pprFlattenRec Uninitialized Next Pointer Testcase (Exploit-DB entry) (opens in a new tab)
EDB-ID 25611dos, windowspublished 21 May 2013Verified
References tagged exploit1 reference
- 25611 (opens in a new tab)exploitx_refsource_EXPLOIT-DBx_transferred
Modules, templates and exploits as listed by the Metasploit Framework (BSD-3-Clause), ProjectDiscovery's Nuclei templates (MIT) and the Exploit Database (GPLv2), read once a day. Where the data comes from
Timeline
ID reserved
By mitre
Published
- 11 years later
· 11 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | Medium4.9 | AV:L/AC:L/Au:N/C:N/I:N/A:C |
- EPSS (exploitation in 30 days)
- 3.9% · top 9.7% of all CVEs (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.9.
Affected products
n/a
- affected n/a
References
References9
- 20130517 Re: exploitation ideas under memory pressure (opens in a new tab)mailing-listx_refsource_FULLDISCx_transferred
- 25611 (opens in a new tab)exploitx_refsource_EXPLOIT-DBx_transferred
- 53435 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 93539 (opens in a new tab)vdb-entryx_refsource_OSVDBx_transferred
- http://www.computerworld.com/s/article/9239477 (opens in a new tab)x_refsource_MISCx_transferred
- http://www.theverge.com/2013/5/23/4358400/google-engineer-bashes-microsoft-discloses-windows-flaw (opens in a new tab)x_refsource_MISCx_transferred
- http://www.reddit.com/r/netsec/comments/1eqh66/0day_windows_kernel_epathobj_vulnerability/ (opens in a new tab)x_refsource_MISCx_transferred
- 20130603 Re: exploitation ideas under memory pressure (opens in a new tab)mailing-listx_refsource_FULLDISCx_transferred
- http://twitter.com/taviso/statuses/335557286657400832 (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2013-3594 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2013-3661)Record last updated .