Vulnerability identifier: #VU60212

Vulnerability risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-42753

CWE-ID: CWE-22

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Fortinet FortiWeb
Server applications / Remote management servers, RDP, SSH

Vendor: Fortinet, Inc

Description

The vulnerability allows a remote user to delete arbitrary files and folders on the system.

The vulnerability exists due to input validation error when processing directory traversal sequences. A remote user can send a specially crafted HTTP request and delete arbitrary files and folders on the system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Fortinet FortiWeb: 6.2.0 - 6.2.6, 6.4.0 - 6.4.1, 6.3.0 - 6.3.15, 5.8.0 - 5.8.7, 6.0.0 - 6.0.7, 6.1.0 - 6.1.2, 5.9.0 - 5.9.1

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External links
http://fortiguard.fortinet.com/psirt/FG-IR-21-158

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.