Privilege escalation in Microsoft Windows

Published: 2013-05-17 | Updated: 2017-03-13
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2013-3660
Exploitation vector Local
Public exploit This vulnerability is being exploited in the wild.
Vulnerable software
Operating systems & Components / Operating system

Windows Server
Operating systems & Components / Operating system

Vendor Microsoft

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Privilege escalation


Risk: Medium


CVE-ID: CVE-2013-3660

CWE-ID: CWE-119 - Memory corruption

Exploit availability: Yes


The vulnerability allows a local attacker to obtain elevated privileges on the target system.

The weakness exists due to the failure to properly initialize a pointer for the next object in a certain list by the EPATHOBJ::pprFlattenRec function within kernel-mode driver (win32k.sys). A local attacker can use multiple FlattenPath function calls to obtain write access to the PATHRECORD chain and execute arbitrary code on the system with elevated privileges.

Successful exploitation of the vulnerability results in arbitrary code execution on the vulnerable system.

Note: the vulnerability was being actively exploited.


Install update from vendor's website.

Vulnerable software versions

Windows: XP, 8, 7, Vista

Windows Server: 2003 - 2012

CPE2.3 External links

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?