RCE in Netgate Pfsense
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 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.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.112 (95.9th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 95.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.112 · newest: 0.112 · change: 0.000
Affected products
Weakness classification (CWE)
References
- www.pfsense.org/security/advisories/pfSense-SA-18_08.webgui.asc (Mitigation, Vendor Advisory)
- doddsecurity.com/190/command-injection-on-pfsense-firewalls/ (Third Party Advisory)
Frequently asked questions
- What is CVE-2018-16055?
- CVE-2018-16055 is a high-severity vulnerability in Netgate Pfsense, classified under OS Command Injection. CVSS score: 8.8/10. Published 2018-09-26.
- How severe is CVE-2018-16055?
- High severity. CVSS v3 base score is 8.8 out of 10.