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CVE-2017-1000479

8.8 · HIGH

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-Fr…

Published Jan 3, 2018CWE-352EPSS 31.70%

Overview

CVE-2017-1000479 is a high-severity vulnerability. It was published on January 3, 2018 and has a CVSS 3.0 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.0 base score of 8.8, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refwww.openwall.com/lists/oss-security/2017/11/22/7Refdoc.pfsense.org/index.php/2.4.2_New_Features_and_ChangesGitHubgithub.com/opnsense/core/commit/d218b225GitHubgithub.com/pfsense/pfsense/commit/386d89b07Refwww.netgate.com/blog/pfsense-2-4-2-release-p1-and-2-3-5-release-p1-now-available.htmlRefwww.securify.nl/en/advisory/SFY20171101/clickjacking-vulnerability-in-csrf-error-page-pfsense.htmlRefwww.openwall.com/lists/oss-security/2017/11/22/7Refdoc.pfsense.org/index.php/2.4.2_New_Features_and_ChangesGitHubgithub.com/opnsense/core/commit/d218b225GitHubgithub.com/pfsense/pfsense/commit/386d89b07

How CyberStrike helps

Frequently asked questions

What is CVE-2017-1000479?

CVE-2017-1000479 is a high-severity vulnerability. It was published on January 3, 2018 and has a CVSS 3.0 base score of 8.8 (HIGH).

How severe is CVE-2017-1000479?

This vulnerability has a CVSS 3.0 base score of 8.8, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2017-1000479?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2017-1000479?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2017-1000479 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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