Main Vulnerability Database Vulnerabilities #VU58629

Cross-site request forgery in FortiProxy and FortiOS - CVE-2021-26103

Published: December 7, 2021

Vulnerability identifier: #VU58629

CSH Severity: Medium

CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-26103

CWE-ID: CWE-352

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to perform cross-site request forgery attacks.

The vulnerability exists due to insufficient validation of the HTTP request origin in the SSL VPN interface. A remote attacker can trick the victim to visit a specially crafted web page and perform arbitrary actions on behalf of the victim on the vulnerable website.

Affected software

FortiProxy
FortiOS

How to mitigate CVE-2021-26103

Install updates from vendor's website.

FortiProxy - addressed in versions 1.2.12, 2.0.4
FortiOS - addressed in versions 6.2.10, 6.4.7, 7.0.1

External References

https://www.fortiguard.com/psirt/FG-IR-20-158

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