pfSense pfBlocker-NG - Remote Code Execution (CVE-2022-31814)

pfSense is affected by a Remote Code Execution, located in the /pfblockerng/www/index.php endpoint. The root cause of this vulnerability consists in insufficient sanitization in the Host header. This allows a malicious unauthenticated attacker to execute arbitrary code on the server through payloads sent in the Host header.

Sniper can gain unauthenticated Remote Code Execution on the target system and extract multiple artefacts as evidence.

The risk exists that a remote unauthenticated attacker can fully compromise the pfSense server in order to steal confidential information, install ransomware or pivot to the internal network.

Upgrade the pfBlocker-NG package to the latest version or to a version greater than 2.1.4_26.

https://nvd.nist.gov/vuln/detail/CVE-2022-31814

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-31814