CVE-2019-12528: Canonical Ubuntu Linux

High severity, CVSS 7.5. EPSS: 10.5% chance of exploitation in the next 30 days.

An issue was discovered in Squid before 4.10. It allows a crafted FTP server to trigger disclosure of sensitive information from heap memory, such as information associated with other users' sessions or non-Squid processes.

Affected products

• Canonical Ubuntu Linux: version 16.04 only; version 18.04 only; version 19.10 only
• Debian Debian Linux: version 9.0 only; version 10.0 only
• Fedoraproject Fedora: version 30 only; version 31 only
• Opensuse Leap: version 15.1 only
• Squid-Cache Squid: before 4.10 (fixed in 4.10)

Published 2020-02-04. Last modified 2026-06-17.