OS Command Injection in VShell

1) OS Command Injection

EUVDB-ID: #VU64736

Risk: Medium

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-28054

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 user to execute arbitrary code on the system.

The vulnerability exists due to insufficient validation of user-supplied input when a trigger action is configured to run a script. A remote user can pass a specially crafted value to the trigger and execute arbitrary commands on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

VShell: 4.0.5 - 4.6.2

External links

http://www.vandyke.com/support/advisory/2022/02/remote-execution-via-triggers.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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