Vulnerability identifier: #VU60213

Vulnerability risk: Low

CVSSv3.1: 5.8 [CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-36193

CWE-ID: CWE-121

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Fortinet FortiWeb
Server applications / Remote management servers, RDP, SSH

Vendor: Fortinet, Inc

Description

The vulnerability allows a local user to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error. A local user can execute a specially crafted command on the system to trigger a stack-based buffer overflow and execute arbitrary code on the target system.

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

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Fortinet FortiWeb: 6.2.0 - 6.2.5, 6.4.0 - 6.4.1, 6.3.0 - 6.3.15, 6.0.0 - 6.0.7, 6.1.0 - 6.1.2, 5.5.0 - 5.5.7, 5.7.0 - 5.7.3, 5.8.0 - 5.8.7, 5.9.0 - 5.9.1, 5.6.0 - 5.6.3, 5.4.0 - 5.4.1, 5.3.0 - 5.3.9, 5.0.0 - 5.0.4, 5.2.0 - 5.2.4, 5.1.0 - 5.1.4

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External links
http://fortiguard.fortinet.com/psirt/FG-IR-21-132

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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.