RCE in Netgate Pfsense
CVE-2018-4020
An exploitable command injection vulnerability exists in the way Netgate pfSense CE 2.4.4-RELEASE processes the parameters of a specific POST request. The attacker can exploit this and gain the ability to execute arbitrary commands on the system. An attacker needs to be able to send authenticated POST requests to the administration web interface. Command injection is possible in the `powerd_ac_mode` POST parameter parameter.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.487 (98.9th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 99th percentile — 98.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.487 · newest: 0.487 · change: 0.000
Affected products
- Netgate Pfsense — versions Netgate pfSense CE 2.4.4-RELEASE
- Netgate Pfsense — versions 2.4.4
Weakness classification (CWE)
Public proof-of-concept exploits
References
- talosintelligence.com/vulnerability_reports/TALOS-2018-0690 (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2018-4020?
- CVE-2018-4020 is a high-severity vulnerability in Netgate Pfsense, classified under OS Command Injection. CVSS score: 7.2/10. Published 2018-12-03.
- How severe is CVE-2018-4020?
- High severity. CVSS v3 base score is 7.2 out of 10.
- Is CVE-2018-4020 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.