Improper certificate validation in FortiOS - CVE-2021-24012
Published: June 1, 2021
Vulnerability identifier: #VU53716
CSH Severity: Medium
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-24012
CWE-ID: CWE-295
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to bypass authorization checks.
The vulnerability exists due to improper verification of the user certificate's chain of trust when connecting to SSL-VPN. A remote LDAP user with any certificate that is signed by a trusted Certificate Authority can connect to VPN server.Affected software
FortiOS
How to mitigate CVE-2021-24012
Install updates from vendor's website.
FortiOS - update to 6.4.5