CVE-2019-15961: Canonical Ubuntu Linux

Medium severity, CVSS 6.5. EPSS: 3.1% chance of exploitation in the next 30 days.

A vulnerability in the email parsing module Clam AntiVirus (ClamAV) Software versions 0.102.0, 0.101.4 and prior could allow an unauthenticated, remote attacker to cause a denial of service condition on an affected device. The vulnerability is due to inefficient MIME parsing routines that result in extremely long scan times of specially formatted email files. An attacker could exploit this vulnerability by sending a crafted email file to an affected device. An exploit could allow the attacker to cause the ClamAV scanning process to scan the crafted email file indefinitely, resulting in a denial of service condition.

Affected products

• Canonical Ubuntu Linux: version 12.04 only; version 14.04 only
• Cisco Email Security Appliance Firmware: version 11.1.1-042 only; version 11.1.2-023 only
• Clamav Clamav: up to and including 0.101.4; version 0.102.0 only
• Debian Debian Linux: version 8.0 only

Published 2020-01-15. Last modified 2026-06-17.