Cross-site request forgery in pfsense - CVE-2019-16667
Published: September 27, 2019 / Updated: June 17, 2021
Vulnerability identifier: #VU21372
CSH Severity: Medium
CVSS v4: 7.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-16667
CWE-ID: CWE-352
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vulnerability details
The vulnerability allows a remote attacker to perform cross-site request forgery attacks.
The vulnerability exists due to insufficient validation of the HTTP request origin in diag_command.php script. A remote attacker can trick the victim to visit a specially crafted web page and and update "txtCommand" and "txtRecallBuffer" fields.
Successful exploitation of the vulnerability may allow an attacker to execute arbitrary OS commands on the system.
Example:
Affected software
pfsense
How to mitigate CVE-2019-16667
Install update from vendor's website.
pfsense - update to 2.4.5