OS command injection in the FortiExtender

1) OS Command Injection

EUVDB-ID: #VU72364

Risk: Low

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-27489

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 shell commands on the target system.

The vulnerability exists due to improper input validation in the webserver. A remote privileged user can pass specially crafted data to the application and execute arbitrary OS commands on the target system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

FortiExtender: 3.0.0 - 7.0.3

CPE2.3

• cpe:2.3:h:fortinet:fortiextender:3.0.0:*:*:*:*:*:*:*
• cpe:2.3:h:fortinet:fortiextender:3.0.1:*:*:*:*:*:*:*
• cpe:2.3:h:fortinet:fortiextender:3.0.2:*:*:*:*:*:*:*
• cpe:2.3:h:fortinet:fortiextender:3.1.0:*:*:*:*:*:*:*
• cpe:2.3:h:fortinet:fortiextender:3.1.1:*:*:*:*:*:*:*
• cpe:2.3:h:fortinet:fortiextender:3.1.2:*:*:*:*:*:*:*
• cpe:2.3:h:fortinet:fortiextender:3.2.1:*:*:*:*:*:*:*
• cpe:2.3:h:fortinet:fortiextender:3.2.2:*:*:*:*:*:*:*
• cpe:2.3:h:fortinet:fortiextender:3.2.3:*:*:*:*:*:*:*
• cpe:2.3:h:fortinet:fortiextender:3.3.0:*:*:*:*:*:*:*

External links

https://fortiguard.com/psirt/FG-IR-22-048

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

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

Is there known malware, which exploits this vulnerability?

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