#VU61367 Input validation error in pfsense and pfSense Plus - CVE-2022-24299

Vulnerability identifier: #VU61367

Vulnerability risk: Medium

CVSSv4.0: 6.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-24299

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
pfsense
Server applications / IDS/IPS systems, Firewalls and proxy servers
pfSense Plus
Server applications / IDS/IPS systems, Firewalls and proxy servers

Vendor: Rubicon Communications

Description

The vulnerability allows a remote attacker to execute arbitrary commands.

The vulnerability exists due to insufficient validation of user-supplied input within the data_ciphers parameter in the vpn_openvpn_server.php and vpn_openvpn_client.php pages. A remote user can pass specially crafted input to the application and execute arbitrary commands on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

pfsense: 1.0.x - 2.5.2

pfSense Plus: before 22.01

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External links
https://jvn.jp/en/jp/JVN87751554/index.html
https://docs.netgate.com/downloads/pfSense-SA-22_03.webgui.asc

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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.