Insufficient verification of data authenticity in Fortinet AV Engine



Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2022-26122
CWE-ID CWE-345
Exploitation vector Network
Public exploit N/A
Vulnerable software
 AV engine
Hardware solutions / Firmware

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

FortiOS
Operating systems & Components / Operating system

Vendor Fortinet, Inc

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Insufficient verification of data authenticity

EUVDB-ID: #VU68929

Risk: Medium

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-26122

CWE-ID: CWE-345 - Insufficient Verification of Data Authenticity

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to insufficient verification of data authenticity. A remote attacker can bypass the AV engine via manipulating MIME attachment with junk and pad characters in base64.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

AV engine: 0.4.23 - 6.253

FortiMail: 6.0.0 - 7.0.2

FortiOS: 6.0.0 - 7.2.0

CPE2.3 External links

https://fortiguard.fortinet.com/psirt/FG-IR-22-074


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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



###SIDEBAR###