Vulnerability in Cujo Smart Firewall
CVE-2018-4002
An exploitable denial-of-service vulnerability exists in the mdnscap binary of the CUJO Smart Firewall running firmware 7003. When parsing labels in mDNS packets, the firewall unsafely handles label compression pointers, leading to an uncontrolled recursion that eventually exhausts the stack, crashing the mdnscap process. An unauthenticated attacker can send an mDNS message to trigger this vulnerability.
EPSS: 0.016 (72.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Cujo Smart_firewall
- Cujo Smart_firewall_firmware — versions 7003
- N/a Cujo — versions CUJO Smart Firewall - Firmware version 7003
Weakness classification (CWE)
References
- talos-cna@cisco.com (Exploit, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2018-4002?
- CVE-2018-4002 is a high-severity vulnerability in Cujo Smart Firewall, classified under Uncontrolled Recursion. CVSS score: 7.5/10. Published 2019-10-31.
- How severe is CVE-2018-4002?
- High severity. CVSS v3 base score is 7.5 out of 10.