CVE-2020-24383: Butok Fnet

Critical severity, CVSS 9.1. EPSS: 4.9% chance of exploitation in the next 30 days.

An issue was discovered in FNET through 4.6.4. The code for processing resource records in mDNS queries doesn't check for proper '\0' termination of the resource record name string, leading to an out-of-bounds read, and potentially causing information leak or Denial-or-Service.

Affected products

• Butok Fnet: up to and including 4.6.4

Published 2020-12-11. Last modified 2026-06-17.