Vulnerability identifier: #VU24132

Vulnerability risk: Medium

CVSSv3.1: 5.9 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C]

CVE-ID: CVE-2019-17659

CWE-ID: CWE-321

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
FortiSIEM
Server applications / DLP, anti-spam, sniffers

Vendor: Fortinet, Inc

Description

The vulnerability allows a remote attacker to gain unauthorized access to the system.

The vulnerability exists due to usage of a hard-coded ssh key for the "tunneluser" account, present in "/home/tunneluser/.ssh/authorized_keys". A remote attacker can use the ssh key to connect to FortiSIEM via SSH service on port 1999/TCP.

Mitigation
Install update from vendor's website.

Vulnerable software versions

FortiSIEM: 5.2.0 - 5.2.6

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External links
http://packetstormsecurity.com/files/download/155868/fortisiem-hardcoded.txt
http://fortiguard.com/psirt/FG-IR-19-296

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.