CVE-2017-1000479 Information

Description

pfSense versions 2.4.1 and lower are vulnerable to clickjacking attacks in the CSRF error page resulting in privileged execution of arbitrary code because the error detection occurs before an X-Frame-Options header is set. This is fixed in 2.4.2-RELEASE. OPNsense a 2015 fork of pfSense was not vulnerable since version 16.1.16 released on June 06 2016. The unprotected web form was removed from the code during an internal security audit under \possibly insecure\ suspicions.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Reference

http://www.openwall.com/lists/oss-security/2017/11/22/7 https://doc.pfsense.org/index.php/2.4.2_New_Features_and_Changes https://github.com/opnsense/core/commit/d218b225 https://github.com/pfsense/pfsense/commit/386d89b07 https://www.netgate.com/blog/pfsense-2-4-2-release-p1-and-2-3-5-release-p1-now-available.html https://www.securify.nl/en/advisory/SFY20171101/clickjacking-vulnerability-in-csrf-error-page-pfsense.html

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