#VU5384 “Use-after-free” error in Windows and Windows Server - CVE-2015-1723

Vulnerability identifier: #VU5384

Vulnerability risk: High

CVSSv4.0: 7.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber]

CVE-ID: CVE-2015-1723

CWE-ID: CWE-119

Exploitation vector: Local

Exploit availability: Yes

Vulnerable software:
Windows
Operating systems & Components / Operating system
Windows Server
Operating systems & Components / Operating system

Vendor: Microsoft

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

The weakness exists due to use-after-free error. A local attacker can run a specially crafted program to trigger memory corruption and acquire administrative privileges.

Successful exploitation of the vulnerability results in privilege escalation on the vulnerable system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Windows: Vista, RT, 7, 8 - 8.1

Windows Server: 2003, 2008 R2 - 2008, 2012 R2 - 2012

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External links
https://technet.microsoft.com/en-us/library/security/ms15-061

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.