Vulnerability identifier: #VU51224

Vulnerability risk: Medium

CVSSv3.1: 5.6 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-22128

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
FortiProxy
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: Fortinet, Inc

Description

The vulnerability allows a remote user to gain unauthorized access to otherwise restricted resources.

The vulnerability exists due to improper access restrictions within the Quick connection functionality implementation. A remote authenticated user can bypass implemented security restrictions and access internal service such as the ZebOS Shell on the FortiProxy appliance through the Quick Connection functionality

Mitigation
Install updates from vendor's website.

Vulnerable software versions

FortiProxy: 2.0.0, 1.2.0 - 1.2.9, 1.1.0 - 1.1.6, 1.0.0 - 1.0.7

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External links
http://www.fortiguard.com/psirt/FG-IR-20-235

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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.