CVE-2018-4011: Getcujo Smart Firewall

High severity, CVSS 7.5. EPSS: 1.3% chance of exploitation in the next 30 days.

An exploitable integer underflow vulnerability exists in the mdnscap binary of the CUJO Smart Firewall, version 7003. When parsing SRV records in an mDNS packet, the "RDLENGTH" value is handled incorrectly, leading to an out-of-bounds access that crashes the mdnscap process. An unauthenticated attacker can send an mDNS message to trigger this vulnerability.

Affected products

• Getcujo Smart Firewall: version 7003 only

Published 2019-03-21. Last modified 2026-06-17.