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CVE-2018-4031
CRITICAL
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.
Published: Oct 31, 2019
Modified: Jun 17, 2026
CWE-94
CVSS Metrics
CVSSv3
Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
NONE
Scope:
CHANGED
Confidentiality Impact:
HIGH
Integrity Impact:
HIGH
Availability Impact:
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Affected Products (1)
| Vendor | Product | Version |
|---|---|---|
| getcujo | smart_firewall | 7003 |
GitHub Security Advisory GHSA-m3xq-c6mf-v376
An exploitable vulnerability exists in the safe browsing function of the CUJO Smart Firewall,...
References (2)
- https://talosintelligence.com/vulnerability_reports/TALOS-2018-0703 Exploit, Third Party Advisory
- https://talosintelligence.com/vulnerability_reports/TALOS-2018-0703 Exploit, Third Party Advisory
Risk Scores
CVSS Score
10.0 / 10
EPSS Score
2.67%
Top 15% most likely to be exploited
Threat Score
40.8 / 100
Data Sources
NVD
EPSS
GitHub