Vulnerability identifier: #VU6472

Vulnerability risk: Medium

CVSSv3.1: 8.9 [CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2017-0263

CWE-ID: CWE-20

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 user to elevate privileges on the system.

The vulnerability exists due to boundary error in Win32k.sys driver. A local user can escalate privileges on the system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Note: this vulnerability is being actively exploited.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Windows: 7, 8.1 - 8.1 RT, 10

Windows Server: 2008 - 2016

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External links
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-0263

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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?

Yes. This vulnerability is being exploited in the wild.