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Corrected an issue which could allow attackers to manipulate session data using the cache. A security announcement will be made shortly. 

git-svn-id: http://code.djangoproject.com/svn/django/trunk@16759 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This commit is contained in:
Russell Keith-Magee 2011-09-10 00:46:48 +00:00
parent 893cea211a
commit 33076af6f2
2 changed files with 15 additions and 9 deletions
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10
django/contrib/sessions/backends/cache.py
View File

@ -1,6 +1,8 @@
from django.contrib.sessions.backends.base import SessionBase, CreateError
from django.core.cache import cache
KEY_PREFIX = "django.contrib.sessions.cache"
class SessionStore(SessionBase):
"""
A cache-based session store.
@ -10,7 +12,7 @@ class SessionStore(SessionBase):
super(SessionStore, self).__init__(session_key)
def load(self):
session_data = self._cache.get(self.session_key)
session_data = self._cache.get(KEY_PREFIX + self.session_key)
if session_data is not None:
return session_data
self.create()
@ -37,18 +39,18 @@ class SessionStore(SessionBase):
func = self._cache.add
else:
func = self._cache.set
result = func(self.session_key, self._get_session(no_load=must_create),
result = func(KEY_PREFIX + self.session_key, self._get_session(no_load=must_create),
self.get_expiry_age())
if must_create and not result:
raise CreateError
def exists(self, session_key):
return session_key in self._cache
return (KEY_PREFIX + session_key) in self._cache
def delete(self, session_key=None):
if session_key is None:
if self._session_key is None:
return
session_key = self._session_key
self._cache.delete(session_key)
self._cache.delete(KEY_PREFIX + session_key)

14
django/contrib/sessions/backends/cached_db.py
View File

@ -6,6 +6,8 @@ from django.conf import settings
from django.contrib.sessions.backends.db import SessionStore as DBStore
from django.core.cache import cache
KEY_PREFIX = "django.contrib.sessions.cached_db"
class SessionStore(DBStore):
"""
Implements cached, database backed sessions.
@ -15,10 +17,11 @@ class SessionStore(DBStore):
super(SessionStore, self).__init__(session_key)
def load(self):
data = cache.get(self.session_key, None)
data = cache.get(KEY_PREFIX + self.session_key, None)
if data is None:
data = super(SessionStore, self).load()
cache.set(self.session_key, data, settings.SESSION_COOKIE_AGE)
cache.set(KEY_PREFIX + self.session_key, data,
settings.SESSION_COOKIE_AGE)
return data
def exists(self, session_key):
@ -26,11 +29,12 @@ class SessionStore(DBStore):
def save(self, must_create=False):
super(SessionStore, self).save(must_create)
cache.set(self.session_key, self._session, settings.SESSION_COOKIE_AGE)
cache.set(KEY_PREFIX + self.session_key, self._session,
settings.SESSION_COOKIE_AGE)
def delete(self, session_key=None):
super(SessionStore, self).delete(session_key)
cache.delete(session_key or self.session_key)
cache.delete(KEY_PREFIX + (session_key or self.session_key))
def flush(self):
"""
@ -39,4 +43,4 @@ class SessionStore(DBStore):
"""
self.clear()
self.delete(self.session_key)
self.create()
self.create()