#VU58367 Permissions, Privileges, and Access Controls


Published: 2021-11-25

Vulnerability identifier: #VU58367

Vulnerability risk: High

CVSSv3.1: 8.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:H/RL:U/RC:C]

CVE-ID: N/A

CWE-ID: CWE-264

Exploitation vector: Local

Exploit availability: Yes

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 escalate privileges on the system.

The vulnerability exists due to incorrect permissions in windows installer service. A local user can run a specially crafted program to execute arbitrary code with SYSTEM privileges.

The vulnerability exists due to incomplete patch for #VU58061 (CVE-2021-41379).

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

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Windows: 10, 10 20H2, 10 21H1, 10 21H2, 10 1507, 10 1511, 10 1607, 10 1703, 10 1709, 10 1803, 10 1809, 10 1903, 10 1909, 10 2004, 10 Gold, 10 Mobile, 10 S

Windows Server: 2019, 2019 20H2, 2019 1709, 2019 1803, 2019 1903, 2019 1909, 2019 2004, 2022

CPE

External links
http://github.com/klinix5/InstallerFileTakeOver
http://blog.talosintelligence.com/2021/11/attackers-exploiting-zero-day.html


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.


Latest bulletins with this vulnerability