CVE-2018-4011

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.3% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2019-03-21 · updated 2026-06-17
Weakness: CWE-191

Description

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: 7003

References

https://talosintelligence.com/vulnerability_reports/TALOS-2018-0681
https://talosintelligence.com/vulnerability_reports/TALOS-2018-0681

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