OS command injection in FortiManager and FortiAnalyzer



Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-26104
CWE-ID CWE-78
Exploitation vector Local
Public exploit N/A
Vulnerable software
 FortiManager
Server applications / IDS/IPS systems, Firewalls and proxy servers

FortiAnalyzer
Server applications / IDS/IPS systems, Firewalls and proxy servers

Vendor Fortinet, Inc

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) OS Command Injection

EUVDB-ID: #VU55544

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 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Exploit availability: No

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 update from vendor's website.

Vulnerable software versions

FortiManager: 5.6.0 - 6.4.5

FortiAnalyzer: 5.6.0 - 6.4.5

CPE2.3 External links

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


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.

How the attacker can exploit this vulnerability?

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

The attacker would have to login to the system and perform certain actions in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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



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