Microsoft · Win32k
CVE-2013-3660
Microsoft Win32k Privilege Escalation Vulnerability
What it is
The EPATHOBJ::pprFlattenRec function in win32k.sys in the kernel-mode drivers 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, and Windows Server 2012 does not properly initialize a pointer for the next object in a certain list, which allows local users to obtain write access to the PATHRECORD chain, and consequently gain privileges, by triggering excessive consumption of paged memory and then making many FlattenPath function calls, aka "Win32k Read AV Vulnerability."
CISA: The EPATHOBJ::pprFlattenRec function in win32k.sys in the kernel-mode drivers in Microsoft does not properly initialize a pointer for the next object in a certain list, which allows local users to gain privileges.
What to do
Apply updates per vendor instructions.
Deadline for US federal agencies: April 18, 2022
- Added to the CISA list
- March 28, 2022
- Published
- May 24, 2013
- Severity
- High 7.8 CVSS 3.1
- Chance of attacks in the next 30 days (EPSS)
- 39% in the top 1.4% of all known vulnerabilities
- Weakness
- CWE-119
- More details
- NVD · CVE.org · CISA
All references (14)
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2013/ms13-053
- http://archives.neohapsis.com/archives/fulldisclosure/2013-05/0094.html
- http://www.exploit-db.com/exploits/25611/
- http://archives.neohapsis.com/archives/fulldisclosure/2013-05/0090.html
- http://secunia.com/advisories/53435
- http://www.osvdb.org/93539
- http://twitter.com/taviso/statuses/309157606247768064
- http://www.computerworld.com/s/article/9239477
- http://www.theverge.com/2013/5/23/4358400/google-engineer-bashes-microsoft-discloses-windows-flaw
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A17360
- http://www.reddit.com/r/netsec/comments/1eqh66/0day_windows_kernel_epathobj_vulnerability/
- http://archives.neohapsis.com/archives/fulldisclosure/2013-06/0006.html
- http://www.us-cert.gov/ncas/alerts/TA13-190A
- http://twitter.com/taviso/statuses/335557286657400832
More exploited flaws from Microsoft
| Added | Vulnerability | Product | Severity | Attack chance |
|---|---|---|---|---|
| Jun 22, 2023 | Privilege Escalation | Win32k | High 7.8 | 14% |
| May 9, 2023 | Privilege Escalation | Win32k | High 7.8 | 41% |
| May 25, 2022 | Privilege Escalation | Win32k | High 8.8 | 15% |
| May 23, 2022 | Privilege Escalation | Win32k | High 7.8 | 3.0% |
| May 4, 2022 | Privilege Escalation | Win32k | High 7.8 | 87% |
| Apr 25, 2022 | Privilege Escalation | Win32k | High 7.8 | 1.6% |
| Apr 25, 2022 | Privilege Escalation | Win32k | High 7.8 | 1.6% |
| Mar 15, 2022 | Memory Corruption | Win32k | High 8.2 | 10% |
Sources: Known Exploited Vulnerabilities (CISA, public domain), CVE records (cve.org) and EPSS (FIRST). The chance of attacks is the EPSS estimate that someone will try to exploit the flaw in the next 30 days.