CVE-2018-3985

An exploitable double free vulnerability exists in the mdnscap binary of the CUJO Smart Firewall

High · published March 21, 2019

CVSS v3.0
8.3
EPSS
2%
Percentile
78.9
In the wild
Unconfirmed
What it is

⚡ An invalid query name can trigger double trouble! A vulnerable mDNS packet could let an attacker execute arbitrary code in the CUJO Smart Firewall's mdnscap process. 🔥 Think of it like a restaurant where a chef accidentally drops the same dish on the floor twice — instead of simply throwing it out, they serve it again, risking food poisoning for everyone! An attacker could exploit this flaw to run malicious code, potentially taking control of the firewall. This could lead to unauthorized access to your network and confidential data being at risk, which is absolutely devastating!

Put simply

Think of it like a restaurant where a chef accidentally drops the same dish on the floor twice — instead of simply throwing it out, they serve it again, risking food poisoning for everyone! This double free vulnerability allows an attacker to exploit memory management errors when parsing mDNS packets, creating a window where arbitrary code can be executed within the mdnscap process, all without authentication.

What to do

An attacker could exploit this flaw to run malicious code, potentially taking control of the firewall. This could lead to unauthorized access to your network and confidential data being at risk, which is absolutely devastating! Update the CUJO Smart Firewall to the latest version where this vulnerability is patched. Regularly check mDNS traffic for anomalies and ensure you have proper security measures in place to prevent unauthorized access. You've got this! Fixing this vulnerability will help keep your network secure and maintain your superhero status in cybersecurity! 🛡️

The record
Technical detail
CVSS v3.0
8.3 · HIGH
Vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L
CVSS v4.0
Not supplied
EPSS
0.01857 · 78.9th percentile
Published
2019-03-21T15:30Z
EPSS history
Timeline
  • 21 MAR 15:30Z
    An exploitable double free vulnerability exists in the mdnscap binary of the CUJO Smart Firewall
    cvelistv5