RCE in Getcujo Smart Firewall
CVE-2018-4031
An exploitable vulnerability exists in the safe browsing function of the CUJO Smart Firewall, version 7003. The flaw lies in the way the safe browsing function parses HTTP requests. The server hostname is extracted from captured HTTP/HTTPS requests and inserted as part of a Lua statement without prior sanitization, which results in arbitrary Lua script execution in the kernel. An attacker could send an HTTP request to exploit this vulnerability.
Vulnerability class: RCE (Remote Code Execution)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.027 (85.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 85th percentile — 85.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.027 · newest: 0.027 · change: 0.000
Affected products
- Getcujo Smart Firewall — versions 7003
- Cujo — versions CUJO Smart Firewall - Firmware version 7003
Weakness classification (CWE)
References
- talosintelligence.com/vulnerability_reports/TALOS-2018-0703 (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2018-4031?
- CVE-2018-4031 is a critical-severity vulnerability in Getcujo Smart Firewall, classified under Code Injection. CVSS score: 10.0/10. Published 2019-10-31.
- How severe is CVE-2018-4031?
- Critical severity. CVSS v3 base score is 10.0 out of 10.