What is the severity of CVE-2020-12812?

CVE-2020-12812 is classified as a high severity vulnerability.

How do I fix CVE-2020-12812?

To fix CVE-2020-12812, upgrade FortiOS to version 6.0.10 or higher, or to versions 6.2.4 or later.

What software versions are affected by CVE-2020-12812?

CVE-2020-12812 affects FortiOS versions 6.0.9 and below, 6.2.0 to 6.2.3, and 6.4.0.

What type of vulnerability is CVE-2020-12812?

CVE-2020-12812 is an improper authentication vulnerability in SSL VPN.

Can users bypass the second factor of authentication due to CVE-2020-12812?

Yes, users may bypass the second factor of authentication by changing the case of their username.

Vulnerability/
CVE-2020-12812

Exploited

critical

9.8

CWE

178 287

24/7/2020

24/2/2025

CVE-2020-12812: Fortinet FortiOS SSL VPN Improper Authentication Vulnerability

First published: Fri Jul 24 2020(Updated: )

An improper authentication vulnerability in SSL VPN in FortiOS 6.4.0, 6.2.0 to 6.2.3, 6.0.9 and below may result in a user being able to log in successfully without being prompted for the second factor of authentication (FortiToken) if they changed the case of their username.

Credit: psirt@fortinet.com psirt@fortinet.com

Affected Software	Affected Version	How to fix
FortiOS
FortiOS	<6.0.10
FortiOS	>=6.2.0<6.2.4
FortiOS	=6.4.0

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Reference Links

Frequently Asked Questions

What is the severity of CVE-2020-12812?
CVE-2020-12812 is classified as a high severity vulnerability.
How do I fix CVE-2020-12812?
To fix CVE-2020-12812, upgrade FortiOS to version 6.0.10 or higher, or to versions 6.2.4 or later.
What software versions are affected by CVE-2020-12812?
CVE-2020-12812 affects FortiOS versions 6.0.9 and below, 6.2.0 to 6.2.3, and 6.4.0.
What type of vulnerability is CVE-2020-12812?
CVE-2020-12812 is an improper authentication vulnerability in SSL VPN.
Can users bypass the second factor of authentication due to CVE-2020-12812?
Yes, users may bypass the second factor of authentication by changing the case of their username.

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