What is CVE-2018-4003?

CVE-2018-4003 is a critical-severity vulnerability in Getcujo Smart Firewall, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2019-03-21.

How severe is CVE-2018-4003?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Getcujo Smart Firewall

CVE-2018-4003

An exploitable heap overflow vulnerability exists in the mdnscap binary of the CUJO Smart Firewall running firmware 7003. The string lengths are handled incorrectly when parsing character strings in mDNS resource records, leading to arbitrary code execution in the context of the mdnscap process. An unauthenticated attacker can send an mDNS message to trigger this vulnerability.

Vulnerability class: Buffer Overflow

EPSS: 0.018 (76.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Getcujo Smart_firewall — versions 7003
N/a Cujo — versions CUJO Smart Firewall - Firmware version 7003

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

talos-cna@cisco.com (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2018-4003?: CVE-2018-4003 is a critical-severity vulnerability in Getcujo Smart Firewall, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2019-03-21.
How severe is CVE-2018-4003?: Critical severity. CVSS v3 base score is 9.8 out of 10.