1) Buffer overflow

Risk: High

CVSSv3.1: 8.4 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:H/RL:O/RC:C] [PCI]

CVE-ID: CVE-2018-8120

CWE-ID: CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer

Exploit availability: Yes

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to boundary error in win32k.sys driver. A local user can execute arbitrary code with SYSTEM privileges.

Note: this vulnerability is being actively exploited in limited targeted attacks.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Windows Server: 2008, 2008 R2

Windows: 7

CPE

• cpe:2.3:o:microsoft:windows_server:2008:*:*:*:*::*:*
• cpe:2.3:o:microsoft:windows_server:2008 R2:*:*:*:*::*:*
• cpe:2.3:o:microsoft:windows:7:*:*:*:*::*:*

External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8120

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.