CVE-2018-16055

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.

Category

8.8
CVSS
Severity: High
CVSS 3.0 •
CVSS 2.0 •
EPSS 8.55% Top 10%
Vendor Advisory pfsense.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://www.pfsense.org/security/advisories/pfSense-SA-18_08.webgui.asc mitigation vendor advisory
https://doddsecurity.com/190/command-injection-on-pfsense-firewalls/ third party advisory

Frequently Asked Questions

What is the severity of CVE-2018-16055?
CVE-2018-16055 has been scored as a high severity vulnerability.
How to fix CVE-2018-16055?
To fix CVE-2018-16055, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2018-16055 being actively exploited in the wild?
It is possible that CVE-2018-16055 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~9% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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