Česky   English
Show vulnerabilities with patch / with exploit

Privilege escalation in Microsoft Windows win32k.sys driver



Published: 2018-05-08 | Updated: 2019-11-07
Severity Medium
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2018-8120
CWE ID CWE-119
Exploitation vector Local
Public exploit This vulnerability is being exploited in the wild.
Vulnerable software
Subscribe 		Windows Server
Operating systems & Components / Operating system

Windows
Operating systems & Components / Operating system

Vendor Microsoft

Security Advisory

This security advisory describes one medium risk vulnerability.

1) Buffer overflow

Severity: High

CVSSv3: 8.2 [CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:F/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 [Search exploit]

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 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?

No. We are not aware of malware exploiting this vulnerability. However, a fully functional exploit for this vulnerability is available.