CVE-2022-40624: pfsense pfblockerng OS Command Injection

Vulnerability summary

CVE-2022-40624 is a critical (CVSS 9.8) OS Command Injection vulnerability in pfsense pfblockerng. EPSS estimates a 18.25% chance of exploitation in the next 30 days, higher than 97.2% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 20-12-2022
   PublishedVulnerability first disclosed.
2. 17-04-2025
   Last modifiedVulnerability information updated.

Description

pfSense pfBlockerNG through 2.1.4_27 allows remote attackers to execute arbitrary OS commands as root via the HTTP Host header, a different vulnerability than CVE-2022-31814.

• CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.