Privilege escalation in Fortinet FortiOS

1) Command injection

EUVDB-ID: #VU13019

Risk: Low

CVSSv3.1: 7.1 [CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-14187

CWE-ID: CWE-77 - Command injection

Exploit availability: No

Description

The vulnerability allows a local high-privileged attacker to execute arbitrary code on the target system.

The vulnerability exists due to improper privileges and access controls. A local administrative attacker with super_admin privileges and with a connected USB drive can link the aforementioned binary to a command that is allowed to be run by the fnsysctl CLI command and execute an arbitrary binary contained on an USB drive plugged to a FortiGate.

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

Mitigation

Update to version 5.4.9 or 5.6.3.

Vulnerable software versions

FortiOS: 5.0.0 - 5.6.2

CPE2.3

• cpe:2.3:o:fortinet:fortios:5.2.0:*:*:*:*:*:*:*
• cpe:2.3:o:fortinet:fortios:5.0.13:*:*:*:*:*:*:*
• cpe:2.3:o:fortinet:fortios:5.4.8:*:*:*:*:*:*:*
• cpe:2.3:o:fortinet:fortios:5.6.2:*:*:*:*:*:*:*

External links

http://fortiguard.com/psirt/FG-IR-17-245

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?

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