CVE-2018-4002 Information

Description

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Reference

https://talosintelligence.com/vulnerability_reports/TALOS-2018-0671

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.5