CVE-2018-4030

Name: CVE-2018-4030
Creator: NVD / NIST
Published: 2019-03-21T16:29:01.767+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.17%

Last modified Jun 17, 2026

CVE-2018-4030 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. An exploitable vulnerability exists the safe browsing function of the CUJO Smart Firewall, version 7003. The bug lies in the way the safe browsing function parses HTTP requests. EPSS estimates a 1.17% chance of exploitation in the next 30 days.

Description

An exploitable vulnerability exists the safe browsing function of the CUJO Smart Firewall, version 7003. The bug lies in the way the safe browsing function parses HTTP requests. The "Host" header is incorrectly extracted from captured HTTP requests, which would allow an attacker to visit any malicious websites and bypass the firewall. An attacker could send an HTTP request to exploit this vulnerability.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS Probability

1.17%

63.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-444

Affected Software

Vendor	Product	Versions
Getcujo	Smart Firewall	7003

References

https://talosintelligence.com/vulnerability_reports/TALOS-2018-0702Exploit, Third Party Advisory
https://talosintelligence.com/vulnerability_reports/TALOS-2018-0702Exploit, Third Party Advisory

Timeline

Published: Mar 21, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-4030?

How severe is CVE-2018-4030?

CVE-2018-4030 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.17% probability of exploitation in the next 30 days.

How do I fix CVE-2018-4030?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-4030?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST