Privilege escalation in Fortinet FortiExtender

1) OS Command Injection

EUVDB-ID: #VU22314

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-2019-15710

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 escalate privileges on the system.

The vulnerability exists due to insufficient processing of user supplied input within the FortiExtender CLI. A remote authenticated user can inject and execute arbitrary system level commands via a specially crafted "execute date" command.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

FortiExtender: 4.0.0 - 4.1.1

CPE2.3

• cpe:2.3:h:fortinet:fortiextender:4.0.0:*:*:*:*:*:*:*
• cpe:2.3:h:fortinet:fortiextender:4.0.1:*:*:*:*:*:*:*
• cpe:2.3:h:fortinet:fortiextender:4.1.0:*:*:*:*:*:*:*
• cpe:2.3:h:fortinet:fortiextender:4.1.1:*:*:*:*:*:*:*

External links

https://fortiguard.com/psirt/FG-IR-19-273

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.