SB2022122036 - Remote code execution in pfSense pfBlocker-NG

Description

This security bulletin contains information about 1 vulnerability.

1) OS Command Injection (CVE-ID: CVE-2022-40624)

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Red

The vulnerability allows a remote attacker to execute arbitrary shell commands on the target system.

The vulnerability exists due to improper input validation when processing HTTP Host header. A remote unauthenticated attacker can send a specially crafted HTTP request to the affected system and execute arbitrary OS commands.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Remediation

Install update from vendor's website.

References

• https://github.com/dhammon/pfBlockerNg-CVE-2022-40624
• https://github.com/dhammon/pfBlockerNg-RCE