#VU52160 Security features bypass in Windows and Windows Server


Published: 2021-04-13

Vulnerability identifier: #VU52160

Vulnerability risk: Low

CVSSv3.1: 3.9 [CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-27094

CWE-ID: CWE-254

Exploitation vector: Local

Exploit availability: No

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 bypass authentication process.

The vulnerability exists due to security feature bypass issue in Windows Early Launch Antimalware Driver. A local administrator can gain elevated privileges on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Windows: 10 - 10 2004, 8.1 - 8.1 RT

Windows Server: 2012 - 2019 2004


External links
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-27094


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.


Latest bulletins with this vulnerability