CVE-2018-16055

Name: CVE-2018-16055
Creator: NVD / NIST
Published: 2018-09-26T22:29:00.887+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 11.19%

Last modified Jun 17, 2026

CVE-2018-16055 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 11.19% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability

11.19%

95.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-78

Affected Software

Vendor	Product	Versions
Netgate	Pfsense	< 2.4.4

References

https://doddsecurity.com/190/command-injection-on-pfsense-firewalls/Third Party Advisory
https://www.pfsense.org/security/advisories/pfSense-SA-18_08.webgui.ascMitigation, Vendor Advisory
https://doddsecurity.com/190/command-injection-on-pfsense-firewalls/Third Party Advisory
https://www.pfsense.org/security/advisories/pfSense-SA-18_08.webgui.ascMitigation, Vendor Advisory

Timeline

Published: Sep 26, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-16055?

How severe is CVE-2018-16055?

Severity scoring for CVE-2018-16055 is pending analysis. The EPSS model estimates a 11.19% probability of exploitation in the next 30 days.

How do I fix CVE-2018-16055?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-16055?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST