CVE-2020-15702: Canonical Apport

High severity, CVSS 7.0. EPSS: 0.5% chance of exploitation in the next 30 days.

TOCTOU Race Condition vulnerability in apport allows a local attacker to escalate privileges and execute arbitrary code. An attacker may exit the crashed process and exploit PID recycling to spawn a root process with the same PID as the crashed process, which can then be used to escalate privileges. Fixed in 2.20.1-0ubuntu2.24, 2.20.9 versions prior to 2.20.9-0ubuntu7.16 and 2.20.11 versions prior to 2.20.11-0ubuntu27.6. Was ZDI-CAN-11234.

Affected products

• Canonical Apport: version 2.20.11-0ubuntu8 only; version 2.20.11-0ubuntu9 only; version 2.20.11-0ubuntu10 only; version 2.20.11-0ubuntu11 only; version 2.20.11-0ubuntu12 only; version 2.20.11-0ubuntu13 only; …
• Canonical Ubuntu Linux: version 14.04 only

Published 2020-08-06. Last modified 2026-06-17.