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Vulnerability of FortiOS: denial of service via SSL VPN Portal POST Request

Synthesis of the vulnerability 

An attacker can trigger a fatal error via SSL VPN Portal POST Request of FortiOS, in order to trigger a denial of service.
Impacted systems: FortiGate, FortiGate Virtual Appliance, FortiOS.
Severity of this alert: 3/4.
Creation date: 28/11/2019.
Références of this alert: CVE-2019-15705, FG-IR-19-236, VIGILANCE-VUL-31019.

Description of the vulnerability 

An attacker can trigger a fatal error via SSL VPN Portal POST Request of FortiOS...
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This security vulnerability impacts software or systems such as FortiGate, FortiGate Virtual Appliance, FortiOS.

Our Vigil@nce team determined that the severity of this computer weakness bulletin is important.

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 note.

Solutions for this threat 

This vulnerability solution will be public soon.
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