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Vulnerability of Fortinet Fortigate: Man-in-the-Middle via Valid SSL-VPN Certificate

Synthesis of the vulnerability 

An attacker can act as a Man-in-the-Middle via Valid SSL-VPN Certificate on Fortinet Fortigate, in order to read or write data in the session.
Vulnerable products: FortiGate, FortiGate Virtual Appliance, FortiOS.
Severity of this weakness: 2/4.
Creation date: 25/09/2020.
Références of this bulletin: VIGILANCE-VUL-33426.

Description of the vulnerability 

An attacker can act as a Man-in-the-Middle via Valid SSL-VPN Certificate on Fort...
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This security threat impacts software or systems such as FortiGate, FortiGate Virtual Appliance, FortiOS.

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

The trust level is of type confirmed by the editor, with an origin of intranet server.

A proof of concept or an attack tool is available, so your teams have to process this alert. An attacker with a technician ability can exploit this computer threat alert.

Solutions for this threat 

Solutions, fixes, patches and workarounds for this vulnerability are not yet public.
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Computer vulnerabilities tracking service 

Vigil@nce provides application vulnerability announces. The Vigil@nce team tracks computer vulnerabilities impacting systems and applications.