Privilege escalation in Fortinet FortiWAN



Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-26115
CWE-ID CWE-78
Exploitation vector Local
Public exploit N/A
Vulnerable software
Subscribe 		FortiWAN
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor Fortinet, Inc

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) OS Command Injection

EUVDB-ID: #VU54725

Risk: Low

CVSSv3.1: 7.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-26115

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 when processing certain OS commands. A local unprivileged user can execute arbitrary OS commands with root privileges.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

FortiWAN: 4.0.0 - 4.5.7

CPE2.3 External links

http://www.fortiguard.com/psirt/FG-IR-21-069


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 device 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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