#VU53717 Stack-based buffer overflow in FortiProxy


Published: 2021-06-01

Vulnerability identifier: #VU53717

Vulnerability risk: Medium

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-22130

CWE-ID: CWE-121

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 execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in FortiProxy physical appliance CLI. A remote authenticated user can run the `diagnose sys cpuset` with a large cpuset mask value, trigger stack-based buffer overflow and execute arbitrary code on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

FortiProxy: 2.0.0 - 2.0.1, 1.2.0 - 1.2.9, 1.1.0 - 1.1.6, 1.0.0 - 1.0.7


External links
http://www.fortiguard.com/psirt/FG-IR-21-006


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.


Latest bulletins with this vulnerability