CVE-2020-6061: Canonical Ubuntu Linux

Critical severity, CVSS 9.8. EPSS: 5.1% chance of exploitation in the next 30 days.

An exploitable heap out-of-bounds read vulnerability exists in the way CoTURN 4.5.1.1 web server parses POST requests. A specially crafted HTTP POST request can lead to information leaks and other misbehavior. An attacker needs to send an HTTPS request to trigger this vulnerability.

Affected products

• Canonical Ubuntu Linux: version 16.04 only; version 18.04 only; version 19.10 only; version 20.04 only
• Coturn Project Coturn: version 4.5.1.1 only
• Debian Debian Linux: version 9.0 only; version 10.0 only
• Fedoraproject Fedora: version 30 only; version 31 only; version 32 only

Published 2020-02-19. Last modified 2026-06-17.