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Vulnerability of FortiOS: privilege escalation via SSL VPN 2FA Username Case

Synthesis of the vulnerability 

An attacker can bypass restrictions via SSL VPN 2FA Username Case of FortiOS, in order to escalate his privileges.
Impacted systems: FortiGate, FortiGate Virtual Appliance, FortiOS.
Severity of this alert: 2/4.
Creation date: 15/07/2020.
Références of this alert: CERTFR-2020-AVI-441, CVE-2020-12812, FG-IR-19-283, VIGILANCE-VUL-32837.

Description of the vulnerability 

An attacker can bypass restrictions via SSL VPN 2FA Username Case of FortiOS, in order to escalate his privileges.
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This cybersecurity alert impacts software or systems such as FortiGate, FortiGate Virtual Appliance, FortiOS.

Our Vigil@nce team determined that the severity of this weakness is medium.

The trust level is of type confirmed by the editor, with an origin of internet client.

An attacker with a expert ability can exploit this security weakness.

Solutions for this threat 

FortiOS: fixed versions for SSL VPN 2FA Username Case.
Fixed versions are indicated in information sources.
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