Fortinet Warns of Active Exploitation of FortiOS SSL VPN 2FA Bypass Vulnerability
Fortinet on Wednesday said it observed "recent abuse" of a five-year-old security flaw in FortiOS SSL VPN in the wild under certain configurations. The vulnerability in question is CVE-2020-12812 (CVSS score: 5.2), an improper authentication vulnerability in SSL VPN in FortiOS that could allow a user to log in successfully without being prompted for the second factor of authentication if the case of the username was changed. This happens when two-factor authentication is enabled in the 'user local' setting, and that user authentication type is set to a remote authentication method (eg, LDAP),Fortinet noted in July 2020. The issue exists because of inconsistent case-sensitive matching among the local and remote authentication. The vulnerability has since come under active exploitation in the wild by multiple threat actors , with the U.S. government also listing it as one of the many weaknesses ...