#VU55544 OS Command Injection in FortiPortal - CVE-2021-26104

Vulnerability identifier: #VU55544

Vulnerability risk: Medium

CVSSv4.0: 7.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:U/U:Green]

CVE-ID: CVE-2021-26104

CWE-ID: CWE-78

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
FortiPortal
Server applications / IDS/IPS systems, Firewalls and proxy servers

Vendor: Fortinet, Inc

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to improper input validation in the command line interface. A local user can execute arbitrary shell commands as root via specifically crafted CLI command parameters.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

FortiPortal: 5.2.0 - 6.0.4

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External links
https://www.fortiguard.com/psirt/FG-IR-21-037

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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.