CVE-2015-5964: Canonical Ubuntu Linux

Medium severity, CVSS 5.0. EPSS: 5% chance of exploitation in the next 30 days.

The (1) contrib.sessions.backends.base.SessionBase.flush and (2) cache_db.SessionStore.flush functions in Django 1.7.x before 1.7.10, 1.4.x before 1.4.22, and possibly other versions create empty sessions in certain circumstances, which allows remote attackers to cause a denial of service (session store consumption) via unspecified vectors.

Affected products

• Canonical Ubuntu Linux: version 12.04 only; version 14.04 only; version 15.04 only
• Djangoproject Django: version 1.4 only; version 1.4.1 only; version 1.4.2 only; version 1.4.4 only; version 1.4.5 only; version 1.4.6 only; …
• Oracle Solaris: version 11.3 only

Published 2015-08-24. Last modified 2026-06-17.