CVE-2018-4031

Severity: critical (CVSS 10.0 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.7% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2019-10-31 · updated 2026-06-17
Weakness: CWE-94

Description

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.

Affected products

Getcujo Smart Firewall: 7003

References

https://talosintelligence.com/vulnerability_reports/TALOS-2018-0703
https://talosintelligence.com/vulnerability_reports/TALOS-2018-0703

Get alerted when CVE-2018-4031 or the next vulnerability affects your stack