CVE-2013-5123: Debian Linux

Medium severity, CVSS 5.9. EPSS: 8% chance of exploitation in the next 30 days.

The mirroring support (-M, --use-mirrors) in Python Pip before 1.5 uses insecure DNS querying and authenticity checks which allows attackers to perform man-in-the-middle attacks.

Affected products

• Debian Debian Linux: version 8.0 only; version 9.0 only; version 10.0 only
• Fedoraproject Fedora: version 20 only; version 21 only
• Pypa Pip: before 1.5 (fixed in 1.5)
• Red Hat Openshift: version 1.0 only; version 2.0 only
• Red Hat Software Collections: affected versions not specified
• Virtualenv Virtualenv: version 12.0.7 only

Published 2019-11-05. Last modified 2026-06-16.