#VU5604 Memory corruption in Windows and Windows Server - CVE-2015-6173

Vulnerability identifier: #VU5604

Vulnerability risk: Medium

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:Green]

CVE-ID: CVE-2015-6173

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 gain elevated privileges on the target system.

The vulnerability exists due to boundary error when handling of objects in kernel memory. A local attacker can execute a specially crafted program, trigger memory corruption and gain SYSTEM privileges.

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

Mitigation
Install update from vendor's website.

Vulnerable software versions

Windows: RT, Vista, 7, 8 - 8.1, 10

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

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External links
https://technet.microsoft.com/en-us/library/security/ms15-135

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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.