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Vulnerability Details : CVE-2017-1000479

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.
Publish Date : 2018-01-03 Last Update Date : 2018-01-25
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- CVSS Scores & Vulnerability Types

CVSS Score
6.8
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact Partial (Modification of some system files or information is possible, but the attacker does not have control over what can be modified, or the scope of what the attacker can affect is limited.)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity Medium (The access conditions are somewhat specialized. Some preconditions must be satistified to exploit)
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Execute CodeCSRF
CWE ID 352

- Products Affected By CVE-2017-1000479

# Product Type Vendor Product Version Update Edition Language
1 Application Pfsense Pfsense 2.4.1 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Pfsense Pfsense 1

- References For CVE-2017-1000479

https://www.netgate.com/blog/pfsense-2-4-2-release-p1-and-2-3-5-release-p1-now-available.html
http://www.openwall.com/lists/oss-security/2017/11/22/7
MLIST [oss-security] 20171122 Clickjacking vulnerability in CSRF error page pfSense
https://doc.pfsense.org/index.php/2.4.2_New_Features_and_Changes
https://www.securify.nl/en/advisory/SFY20171101/clickjacking-vulnerability-in-csrf-error-page-pfsense.html
https://github.com/pfsense/pfsense/commit/386d89b07
https://github.com/opnsense/core/commit/d218b225

- Metasploit Modules Related To CVE-2017-1000479

Clickjacking Vulnerability In CSRF Error Page pfSense
This module exploits a Clickjacking vulnerability in pfSense <= 2.4.1. pfSense is a free and open source firewall and router. It was found that the pfSense WebGUI is vulnerable to Clickjacking. By tricking an authenticated admin into interacting with a specially crafted webpage it is possible for an attacker to execute arbitrary code in the WebGUI. Since the WebGUI runs as the root user, this will result in a full compromise of the pfSense instance.
Module type : exploit Rank : normal Platforms : PHP


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