Bug#686814: unblock: swift/1.4.8-2

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Package: release.debian.org
Severity: normal
User: release.debian.org@packages.debian.org
Usertags: unblock

Please unblock package swift. This new version fixes CVE-2012-4406 / #686812.
Debdiff attached: it only adds upstream patch as see here:
https://github.com/openstack/swift/...6cb0e5831a

Pleaes unblock swift/1.4.8-2,
Cheers,

Thomas Goirand (zigo)


diff -Nru swift-1.4.8/debian/changelog swift-1.4.8/debian/changelog
swift-1.4.8/debian/changelog 2012-03-23 07:11:47.000000000 +0000
+++ swift-1.4.8/debian/changelog 2012-09-06 08:45:21.000000000 +0000
@@ -1,3 +1,10 @@
+swift (1.4.8-2) unstable; urgency=high
+
+ * CVE-2012-4406: Do not use pickle for serialization in memcache, but JSON
+ (Closes: #686812).
+
+ -- Thomas Goirand <zigo@debian.org> Thu, 06 Sep 2012 08:40:18 +0000
+
swift (1.4.8-1) unstable; urgency=low

* New upstream release.
diff -Nru swift-1.4.8/debian/patches/CVE-2012-4406_Do-not-use-pickle-for-serialization-in-memcache-but-JSON.patch swift-1.4.8/debian/patches/CVE-2012-4406_Do-not-use-pickle-for-serialization-in-memcache-but-JSON.patch
swift-1.4.8/debian/patches/CVE-2012-4406_Do-not-use-pickle-for-serialization-in-memcache-but-JSON.patch 1970-01-01 00:00:00.000000000 +0000
+++ swift-1.4.8/debian/patches/CVE-2012-4406_Do-not-use-pickle-for-serialization-in-memcache-but-JSON.patch 2012-09-06 08:45:21.000000000 +0000
@@ -0,0 +1,321 @@
+Description: Do not use pickle for serialization in memcache, but JSON
+ We don't want to use pickle as it can execute arbitrary code. JSON is
+ safer. However, note that it supports serialization for only some
+ specific subset of object types; this should be enough for what we need,
+ though.
+ .
+ To avoid issues on upgrades (unability to read pickled values, and cache
+ poisoning for old servers not understanding JSON), we add a
+ memcache_serialization_support configuration option, with the following
+ values:
+ .
+ 0 = older, insecure pickle serialization
+ 1 = json serialization but pickles can still be read (still insecure)
+ 2 = json serialization only (secure and the default)
+ .
+ To avoid an instant full cache flush, existing installations should
+ upgrade with 0, then set to 1 and reload, then after some time (24
+ hours) set to 2 and reload. Support for 0 and 1 will be removed in
+ future versions.
+Origin: upstream
+Bug-Debian: http://bugs.debian.org/686812
+Bug-Ubuntu: https://launchpad.net/bugs/1006414
+
+ swift-1.4.8.orig/etc/memcache.conf-sample
++++ swift-1.4.8/etc/memcache.conf-sample
+@@ -3,3 +3,13 @@
+ # several other conf files under [filter:cache] for example. You can specify
+ # multiple servers separated with commas, as in: 10.1.2.3:11211,10.1.2.4:11211
+ # memcache_servers = 127.0.0.1:11211
++#
++# Sets how memcache values are serialized and deserialized:
++# 0 = older, insecure pickle serialization
++# 1 = json serialization but pickles can still be read (still insecure)
++# 2 = json serialization only (secure and the default)
++# To avoid an instant full cache flush, existing installations should
++# upgrade with 0, then set to 1 and reload, then after some time (24 hours)
++# set to 2 and reload.
++# In the future, the ability to use pickle serialization will be removed.
++# memcache_serialization_support = 2
+ swift-1.4.8.orig/etc/proxy-server.conf-sample
++++ swift-1.4.8/etc/proxy-server.conf-sample
+@@ -122,6 +122,18 @@ use = egg:swift#memcache
+ # default to the value below. You can specify multiple servers separated with
+ # commas, as in: 10.1.2.3:11211,10.1.2.4:11211
+ # memcache_servers = 127.0.0.1:11211
++#
++# Sets how memcache values are serialized and deserialized:
++# 0 = older, insecure pickle serialization
++# 1 = json serialization but pickles can still be read (still insecure)
++# 2 = json serialization only (secure and the default)
++# If not set here, the value for memcache_serialization_support will be read
++# from /etc/swift/memcache.conf (see memcache.conf-sample).
++# To avoid an instant full cache flush, existing installations should
++# upgrade with 0, then set to 1 and reload, then after some time (24 hours)
++# set to 2 and reload.
++# In the future, the ability to use pickle serialization will be removed.
++# memcache_serialization_support = 2
+
+ [filter:ratelimit]
+ use = egg:swift#ratelimit
+ swift-1.4.8.orig/doc/manpages/proxy-server.conf.5
++++ swift-1.4.8/doc/manpages/proxy-server.conf.5
+@@ -205,6 +205,21 @@ Enables the ability to log request heade
+ .IP \fBmemcache_servers\fR
+ The memcache servers that are available. This can be a list separated by commas. The default
+ is 127.0.0.1:11211.
++.IP \fBmemcache_serialization_support\fR
++This sets how memcache values are serialized and deserialized:
++.RE
++
++.PD 0
++.RS 10
++.IP "0 = older, insecure pickle serialization"
++.IP "1 = json serialization but pickles can still be read (still insecure)"
++.IP "2 = json serialization only (secure and the default)"
++.RE
++
++.RS 10
++To avoid an instant full cache flush, existing installations should upgrade with 0, then set to 1 and reload, then after some time (24 hours) set to 2 and reload. In the future, the ability to use pickle serialization will be removed.
++
++If not set in the configuration file, the value for memcache_serialization_support will be read from /etc/swift/memcache.conf if it exists (see memcache.conf-sample). Otherwise, the default value as indicated above will be used.
+ .RE
+
+
+ swift-1.4.8.orig/swift/common/memcached.py
++++ swift-1.4.8/swift/common/memcached.py
+@@ -27,11 +27,17 @@ import time
+ from bisect import bisect
+ from hashlib import md5
+
++try:
++ import simplejson as json
++except ImportError:
++ import json
++
+ DEFAULT_MEMCACHED_PORT = 11211
+
+ CONN_TIMEOUT = 0.3
+ IO_TIMEOUT = 2.0
+ PICKLE_FLAG = 1
++JSON_FLAG = 2
+ NODE_WEIGHT = 50
+ PICKLE_PROTOCOL = 2
+ TRY_COUNT = 3
+@@ -57,7 +63,8 @@ class MemcacheRing(object):
+ """
+
+ def __init__(self, servers, connect_timeout=CONN_TIMEOUT,
+- io_timeout=IO_TIMEOUT, tries=TRY_COUNT):
++ io_timeout=IO_TIMEOUT, tries=TRY_COUNT,
++ allow_pickle=False, allow_unpickle=False):
+ self._ring = {}
+ self._errors = dict(((serv, []) for serv in servers))
+ self._error_limited = dict(((serv, 0) for serv in servers))
+@@ -69,6 +76,8 @@ class MemcacheRing(object):
+ self._client_cache = dict(((server, []) for server in servers))
+ self._connect_timeout = connect_timeout
+ self._io_timeout = io_timeout
++ self._allow_pickle = allow_pickle
++ self._allow_unpickle = allow_unpickle or allow_pickle
+
+ def _exception_occurred(self, server, e, action='talking'):
+ if isinstance(e, socket.timeout):
+@@ -130,16 +139,21 @@ class MemcacheRing(object):
+
+ :param key: key
+ :param value: value
+- :param serialize: if True, value is pickled before sending to memcache
++ :param serialize: if True, value is serialized with JSON before sending
++ to memcache, or with pickle if configured to use
++ pickle instead of JSON (to avoid cache poisoning)
+ :param timeout: ttl in memcache
+ """
+ key = md5hash(key)
+ if timeout > 0:
+ timeout += time.time()
+ flags = 0
+- if serialize:
++ if serialize and self._allow_pickle:
+ value = pickle.dumps(value, PICKLE_PROTOCOL)
+ flags |= PICKLE_FLAG
++ elif serialize:
++ value = json.dumps(value)
++ flags |= JSON_FLAG
+ for (server, fp, sock) in self._get_conns(key):
+ try:
+ sock.sendall('set %s %d %d %s noreply%s' % \
+@@ -151,8 +165,9 @@ class MemcacheRing(object):
+
+ def get(self, key):
+ """
+- Gets the object specified by key. It will also unpickle the object
+- before returning if it is pickled in memcache.
++ Gets the object specified by key. It will also unserialize the object
++ before returning if it is serialized in memcache with JSON, or if it
++ is pickled and unpickling is allowed.
+
+ :param key: key
+ :returns: value of the key in memcache
+@@ -168,7 +183,12 @@ class MemcacheRing(object):
+ size = int(line[3])
+ value = fp.read(size)
+ if int(line[2]) & PICKLE_FLAG:
+- value = pickle.loads(value)
++ if self._allow_unpickle:
++ value = pickle.loads(value)
++ else:
++ value = None
++ elif int(line[2]) & JSON_FLAG:
++ value = json.loads(value)
+ fp.readline()
+ line = fp.readline().strip().split()
+ self._return_conn(server, fp, sock)
+@@ -258,7 +278,9 @@ class MemcacheRing(object):
+ :param mapping: dictonary of keys and values to be set in memcache
+ :param servery_key: key to use in determining which server in the ring
+ is used
+- :param serialize: if True, value is pickled before sending to memcache
++ :param serialize: if True, value is serialized with JSON before sending
++ to memcache, or with pickle if configured to use
++ pickle instead of JSON (to avoid cache poisoning)
+ :param timeout: ttl for memcache
+ """
+ server_key = md5hash(server_key)
+@@ -268,9 +290,12 @@ class MemcacheRing(object):
+ for key, value in mapping.iteritems():
+ key = md5hash(key)
+ flags = 0
+- if serialize:
++ if serialize and self._allow_pickle:
+ value = pickle.dumps(value, PICKLE_PROTOCOL)
+ flags |= PICKLE_FLAG
++ elif serialize:
++ value = json.dumps(value)
++ flags |= JSON_FLAG
+ msg += ('set %s %d %d %s noreply%s' %
+ (key, flags, timeout, len(value), value))
+ for (server, fp, sock) in self._get_conns(server_key):
+@@ -302,7 +327,12 @@ class MemcacheRing(object):
+ size = int(line[3])
+ value = fp.read(size)
+ if int(line[2]) & PICKLE_FLAG:
+- value = pickle.loads(value)
++ if self._allow_unpickle:
++ value = pickle.loads(value)
++ else:
++ value = None
++ elif int(line[2]) & JSON_FLAG:
++ value = json.loads(value)
+ responses[line[1]] = value
+ fp.readline()
+ line = fp.readline().strip().split()
+ swift-1.4.8.orig/swift/common/middleware/memcache.py
++++ swift-1.4.8/swift/common/middleware/memcache.py
+@@ -27,20 +27,36 @@ class MemcacheMiddleware(object):
+ def __init__(self, app, conf):
+ self.app = app
+ self.memcache_servers = conf.get('memcache_servers')
+- if not self.memcache_servers:
++ serialization_format = conf.get('memcache_serialization_support')
++
++ if not self.memcache_servers or serialization_format is None:
+ path = os.path.join(conf.get('swift_dir', '/etc/swift'),
+ 'memcache.conf')
+ memcache_conf = ConfigParser()
+ if memcache_conf.read(path):
+- try:
+- self.memcache_servers = \
+- memcache_conf.get('memcache', 'memcache_servers')
+- except (NoSectionError, NoOptionError):
+- pass
++ if not self.memcache_servers:
++ try:
++ self.memcache_servers = \
++ memcache_conf.get('memcache', 'memcache_servers')
++ except (NoSectionError, NoOptionError):
++ pass
++ if serialization_format is None:
++ try:
++ serialization_format = \
++ memcache_conf.get('memcache',
++ 'memcache_serialization_support')
++ except (NoSectionError, NoOptionError):
++ pass
++
+ if not self.memcache_servers:
+ self.memcache_servers = '127.0.0.1:11211'
++ if serialization_format is None:
++ serialization_format = 2
++
+ self.memcache = MemcacheRing(
+- [s.strip() for s in self.memcache_servers.split(',') if s.strip()])
++ [s.strip() for s in self.memcache_servers.split(',') if s.strip()],
++ allow_pickle=(serialization_format == 0),
++ allow_unpickle=(serialization_format <= 1))
+
+ def __call__(self, env, start_response):
+ env['swift.cache'] = self.memcache
+ swift-1.4.8.orig/test/unit/common/test_memcached.py
++++ swift-1.4.8/test/unit/common/test_memcached.py
+@@ -1,3 +1,4 @@
++ # -*- coding: utf8 -*-
+ # Copyright (c) 2010-2012 OpenStack, LLC.
+ #
+ # Licensed under the Apache License, Version 2.0 (the "License");
+@@ -166,6 +167,9 @@ class TestMemcached(unittest.TestCase):
+ self.assertEquals(memcache_client.get('some_key'), [1, 2, 3])
+ memcache_client.set('some_key', [4, 5, 6])
+ self.assertEquals(memcache_client.get('some_key'), [4, 5, 6])
++ memcache_client.set('some_key', ['simple str', 'utf8 str éà '])
++ # As per http://wiki.openstack.org/encoding, we should expect to have unicode
++ self.assertEquals(memcache_client.get('some_key'), ['simple str', u'utf8 str éà '])
+ self.assert_(float(mock.cache.values()[0][1]) == 0)
+ esttimeout = time.time() + 10
+ memcache_client.set('some_key', [1, 2, 3], timeout=10)
+@@ -244,6 +248,24 @@ class TestMemcached(unittest.TestCase):
+ self.assertEquals(memcache_client.get_multi(('some_key2', 'some_key1',
+ 'not_exists'), 'multi_key'), [[4, 5, 6], [1, 2, 3], None])
+
++ def test_serialization(self):
++ memcache_client = memcached.MemcacheRing(['1.2.3.4:11211'],
++ allow_pickle=True)
++ mock = MockMemcached()
++ memcache_client._client_cache['1.2.3.4:11211'] = [(mock, mock)] * 2
++ memcache_client.set('some_key', [1, 2, 3])
++ self.assertEquals(memcache_client.get('some_key'), [1, 2, 3])
++ memcache_client._allow_pickle = False
++ memcache_client._allow_unpickle = True
++ self.assertEquals(memcache_client.get('some_key'), [1, 2, 3])
++ memcache_client._allow_unpickle = False
++ self.assertEquals(memcache_client.get('some_key'), None)
++ memcache_client.set('some_key', [1, 2, 3])
++ self.assertEquals(memcache_client.get('some_key'), [1, 2, 3])
++ memcache_client._allow_unpickle = True
++ self.assertEquals(memcache_client.get('some_key'), [1, 2, 3])
++ memcache_client._allow_pickle = True
++ self.assertEquals(memcache_client.get('some_key'), [1, 2, 3])
+
+ if __name__ == '__main__':
+ unittest.main()
+ swift-1.4.8.orig/test/unit/common/middleware/test_memcache.py
++++ swift-1.4.8/test/unit/common/middleware/test_memcache.py
+@@ -47,6 +47,8 @@ class SetConfigParser(object):
+ if section == 'memcache':
+ if option == 'memcache_servers':
+ return '1.2.3.4:5'
++ elif option == 'memcache_serialization_support':
++ return '2'
+ else:
+ raise NoOptionError(option)
+ else:
+@@ -86,7 +88,8 @@ class TestCacheMiddleware(unittest.TestC
+ exc = None
+ try:
+ app = memcache.MemcacheMiddleware(
+- FakeApp(), {'memcache_servers': '1.2.3.4:5'})
++ FakeApp(), {'memcache_servers': '1.2.3.4:5',
++ 'memcache_serialization_support': '2'})
+ except Exception, err:
+ exc = err
+ finally:
diff -Nru swift-1.4.8/debian/patches/series swift-1.4.8/debian/patches/series
swift-1.4.8/debian/patches/series 1970-01-01 00:00:00.000000000 +0000
+++ swift-1.4.8/debian/patches/series 2012-09-06 08:45:21.000000000 +0000
@@ -0,0 +1 @@
+CVE-2012-4406_Do-not-use-pickle-for-serialization-in-memcache-but-JSON.patch



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