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CVE-2018-16055

8.8 · HIGH

An authenticated command injection vulnerability exists in status_interfaces.php via dhcp_relinquish_lease() in pfSense before 2.4.4 due to its passing user input from the $_POST parameters "ifdesc…

Published Sep 26, 2018CWE-78EPSS 11.19%

Overview

CVE-2018-16055 is a high-severity vulnerability. It was published on September 26, 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. Some level of privileges is required for exploitation.

Technical description

An authenticated command injection vulnerability exists in status_interfaces.php via dhcp_relinquish_lease() in pfSense before 2.4.4 due to its passing user input from the $_POST parameters "ifdescr" and "ipv" to a shell without escaping the contents of the variables. This allows an authenticated WebGUI user with privileges for the affected page to execute commands in the context of the root user when submitting a request to relinquish a DHCP lease for an interface which is configured to obtain its address via DHCP.

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

Refdoddsecurity.com/190/command-injection-on-pfsense-firewalls/Refwww.pfsense.org/security/advisories/pfSense-SA-18_08.webgui.ascRefdoddsecurity.com/190/command-injection-on-pfsense-firewalls/Refwww.pfsense.org/security/advisories/pfSense-SA-18_08.webgui.asc

How CyberStrike helps

Frequently asked questions

What is CVE-2018-16055?

CVE-2018-16055 is a high-severity vulnerability. It was published on September 26, 2018 and has a CVSS 3.0 base score of 8.8 (HIGH).

How severe is CVE-2018-16055?

This vulnerability has a CVSS 3.0 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2018-16055?

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-2018-16055?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2018-16055 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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