GHSA-X38M-486C-2WR9 Denial-of-service possibility in logout() view by filling session store

The 1 contrib.sessions.backends.base.SessionBase.flush and 2 cachedb.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 stor...