CVE-2019-16667 Information

Description

diag_command.php in pfSense 2.4.4-p3 allows CSRF via the txtCommand or txtRecallBuffer field as demonstrated by executing OS commands. This occurs because csrf_callback() produces a \CSRF token expired\ error and a Try Again button when a CSRF token is missing.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Reference

http://packetstormsecurity.com/files/158614/pfSense-2.4.4-p3-Cross-Site-Request-Forgery.html https://pastebin.com/TEJdu9LN

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.8