Multiple vulnerabilities in Microsoft Windows Early Launch Antimalware Driver

Published: 2021-04-13

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2021-27094 CVE-2021-28447
CWE-ID	CWE-254
Exploitation vector	Local
Public exploit	N/A
Vulnerable software Subscribe	Windows Operating systems & Components / Operating system Windows Server Operating systems & Components / Operating system
Vendor	Microsoft

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Security features bypass

EUVDB-ID: #VU52160

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2021-27094

CWE-ID: CWE-254 - Security Features

Exploit availability: No

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: 8.1 - 10 2004

Windows Server: 2012 - 2019 2004

CPE2.3

cpe:2.3:o:microsoft:windows:10:1803:*:*:*:*:*:*

External links

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

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

2) Security features bypass

EUVDB-ID: #VU52161