Information disclosure in FortiOS - CVE-2021-43206

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Main Vulnerability Database Vulnerabilities #VU62772

Information disclosure in FortiOS - CVE-2021-43206

Published: May 3, 2022


Vulnerability identifier: #VU62772
CSH Severity: Medium
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-43206
CWE-ID: CWE-200
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to excessive data output in server-generated error messages. A remote attacker can trick the victim to connect to a malicious webserver and retrieve a web proxy's client username and IP via same origin HTTP requests triggering proxy-generated HTTP status codes pages.


Affected software

FortiOS
FortiProxy

How to mitigate CVE-2021-43206

Install updates from vendor's website.

FortiOS - addressed in versions 6.4.9, 7.0.4
FortiProxy - addressed in versions 2.0.9, 7.0.2

External References

Related Security Bulletins