CVE-2011-4407: Canonical Software-Properties

Medium severity, CVSS 4.3. EPSS: 0.6% chance of exploitation in the next 30 days.

ppa.py in Software Properties before 0.81.13.3 does not validate the server certificate when downloading PPA GPG key fingerprints, which allows man-in-the-middle (MITM) attackers to spoof GPG keys for a package repository.

Affected products

• Canonical Software-Properties: up to and including 0.81.13.1
• Canonical Ubuntu Linux: version 10.04 only; version 10.10 only; version 11.04 only; version 11.10 only

Published 2014-05-14. Last modified 2026-06-16.