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Vulnerability of FortiOS: open redirect via the VPN portal

Synthesis of the vulnerability 

An attacker can deceive the user via VPN of Fortinet FortiOS, in order to redirect him to a malicious site.
Impacted software: FortiGate, FortiGate Virtual Appliance, FortiOS.
Severity of this computer vulnerability: 1/4.
Creation date: 22/05/2019.
Références of this announce: CVE-2018-13384, FG-IR-19-002, VIGILANCE-VUL-29386.

Description of the vulnerability 

An attacker can deceive the user via the VPN portal of Fortinet FortiOS, in order to redirect him to a malicious site.
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This computer threat alert impacts software or systems such as FortiGate, FortiGate Virtual Appliance, FortiOS.

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

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 computer weakness bulletin.

Solutions for this threat 

FortiOS: version 6.2.0.
The version 6.2.0 is fixed:
  https://www.fortinet.com/

FortiOS: version 6.0.5.
The version 6.0.5 is fixed.

FortiOS: version 5.2.15.
The version 5.2.15 is fixed:
  https://fortinet.com/
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