OS Kernel information disclosure Microsoft Windows

1) Improper Privilege Management

EUVDB-ID: #VU53890

Risk: Medium

CVSSv4.0: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:A/U:Green]

CVE-ID: CVE-2021-31955

CWE-ID: CWE-269 - Improper Privilege Management

Exploit availability: Yes

Description

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to improper privilege management. A local unprivileged user can read contents of Kernel memory from a user mode process.

Note, the vulnerability is being actively exploited in the wild.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Windows: 10 20H2 10.0.19042.572 - 10 2004 10.0.19041.264

Windows Server: 2019 10.0.17763.1 - 2019 2004

CPE2.3

• cpe:2.3:o:microsoft:windows:10_20H2:10.0.19042.572:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows:10_21H1:10.0.19043.985:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows:10_1809:10.0.17763.1:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows:10_1909:10.0.18363.476:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows:10_2004:10.0.19041.264:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server:2019_2004:*:*:*:*:*:*:*

External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31955

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.