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.

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)

EPSS: 0.027 (84.2th percentile) — read the EPSS interpretation.

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.

Affected products

Getcujo Smart_firewall — versions 7003
N/a Cujo — versions CUJO Smart Firewall - Firmware version 7003

Weakness classification (CWE)

CWE-94 — Code Injection

References

talos-cna@cisco.com (Exploit, Third Party Advisory, x_refsource_MISC)

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.