CVE-2018-3985

Name: CVE-2018-3985
Creator: NVD / NIST
Published: 2019-03-21T16:29:01.627+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.86%

Last modified Jun 17, 2026

CVE-2018-3985 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. An exploitable double free vulnerability exists in the mdnscap binary of the CUJO Smart Firewall. When parsing mDNS packets, a memory space is freed twice if an invalid query name is encountered, leading to arbitrary code execution in the context of the mdnscap process. EPSS estimates a 1.86% chance of exploitation in the next 30 days.

Description

An exploitable double free vulnerability exists in the mdnscap binary of the CUJO Smart Firewall. When parsing mDNS packets, a memory space is freed twice if an invalid query name is encountered, leading to arbitrary code execution in the context of the mdnscap process. An unauthenticated attacker can send an mDNS message to trigger this vulnerability.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

1.86%

76.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-415

Affected Software

Vendor	Product	Versions
Getcujo	Smart Firewall	7003

References

https://talosintelligence.com/vulnerability_reports/TALOS-2018-0653Exploit, Third Party Advisory
https://talosintelligence.com/vulnerability_reports/TALOS-2018-0653Exploit, Third Party Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2018-3985?

How severe is CVE-2018-3985?

CVE-2018-3985 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.86% probability of exploitation in the next 30 days.

How do I fix CVE-2018-3985?

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-2018-3985?

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

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Source: NVD / NIST