Remote command execution in Windows PowerShell

1) OS Command Injection

EUVDB-ID: #VU50137

Risk: Medium

CVSSv3.1: 6.9 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:U/RC:C]

CVE-ID: N/A

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary shell commands on the target system.

The vulnerability exists due to improper input validation within the shell handler for opening a folder in PowerShell. Crafted data in a folder name can trigger execution of a system call composed from a user-supplied string. A remote attacker can trick the victim to open a specially crafted file and execute arbitrary commands on the system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

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

Vulnerable software versions

Windows: 10 - 10 Mobile

Windows Server: 2012 - 2019 2004

External links

http://www.zerodayinitiative.com/advisories/ZDI-21-089/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.