rpms/ipa
5
0
Fork 0
Code Issues Pull Requests Releases Activity

ipa: Invalid CSRF protection (CVE-2023-5455)

Browse Source
This commit is contained in:
Andrew Lukoshko 2024-01-11 17:11:08 +00:00
parent e0b190c16d
commit 0e8cd51687
3 changed files with 491 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

122
SOURCES/0026-Check-the-HTTP-Referer-header-on-all-requests.patch Normal file
View File

@ -0,0 +1,122 @@
From 363fd5de98e883800ac08b2760e8c3150783e7e2 Mon Sep 17 00:00:00 2001
From: Rob Crittenden <rcritten@redhat.com>
Date: Fri, 6 Oct 2023 20:16:29 +0000
Subject: [PATCH 1/3] Check the HTTP Referer header on all requests
The referer was only checked in WSGIExecutioner classes:
- jsonserver
- KerberosWSGIExecutioner
- xmlserver
- jsonserver_kerb
This left /i18n_messages, /session/login_kerberos,
/session/login_x509, /session/login_password,
/session/change_password and /session/sync_token unprotected
against CSRF attacks.
CVE-2023-5455
Signed-off-by: Rob Crittenden <rcritten@redhat.com>
(cherry picked from commit 63f76159b0fe5ab779206a28e07a49500fc1fdbe)
---
ipaserver/rpcserver.py | 34 +++++++++++++++++++++++++++++++---
1 file changed, 31 insertions(+), 3 deletions(-)
diff --git a/ipaserver/rpcserver.py b/ipaserver/rpcserver.py
index b7116469d..198fc9e7d 100644
--- a/ipaserver/rpcserver.py
+++ b/ipaserver/rpcserver.py
@@ -156,6 +156,19 @@ _success_template = """<html>
</html>"""
class HTTP_Status(plugable.Plugin):
+ def check_referer(self, environ):
+ if "HTTP_REFERER" not in environ:
+ logger.error("Rejecting request with missing Referer")
+ return False
+ if (not environ["HTTP_REFERER"].startswith(
+ "https://%s/ipa" % self.api.env.host)
+ and not self.env.in_tree):
+ logger.error("Rejecting request with bad Referer %s",
+ environ["HTTP_REFERER"])
+ return False
+ logger.debug("Valid Referer %s", environ["HTTP_REFERER"])
+ return True
+
def not_found(self, environ, start_response, url, message):
"""
Return a 404 Not Found error.
@@ -331,9 +344,6 @@ class wsgi_dispatch(Executioner, HTTP_Status):
self.__apps[key] = app
-
-
-
class WSGIExecutioner(Executioner):
"""
Base class for execution backends with a WSGI application interface.
@@ -898,6 +908,9 @@ class jsonserver_session(jsonserver, KerberosSession):
logger.debug('WSGI jsonserver_session.__call__:')
+ if not self.check_referer(environ):
+ return self.bad_request(environ, start_response, 'denied')
+
# Redirect to login if no Kerberos credentials
ccache_name = self.get_environ_creds(environ)
if ccache_name is None:
@@ -950,6 +963,9 @@ class KerberosLogin(Backend, KerberosSession):
def __call__(self, environ, start_response):
logger.debug('WSGI KerberosLogin.__call__:')
+ if not self.check_referer(environ):
+ return self.bad_request(environ, start_response, 'denied')
+
# Redirect to login if no Kerberos credentials
user_ccache_name = self.get_environ_creds(environ)
if user_ccache_name is None:
@@ -968,6 +984,9 @@ class login_x509(KerberosLogin):
def __call__(self, environ, start_response):
logger.debug('WSGI login_x509.__call__:')
+ if not self.check_referer(environ):
+ return self.bad_request(environ, start_response, 'denied')
+
if 'KRB5CCNAME' not in environ:
return self.unauthorized(
environ, start_response, 'KRB5CCNAME not set',
@@ -1016,6 +1035,9 @@ class login_password(Backend, KerberosSession):
logger.debug('WSGI login_password.__call__:')
+ if not self.check_referer(environ):
+ return self.bad_request(environ, start_response, 'denied')
+
# Get the user and password parameters from the request
content_type = environ.get('CONTENT_TYPE', '').lower()
if not content_type.startswith('application/x-www-form-urlencoded'):
@@ -1148,6 +1170,9 @@ class change_password(Backend, HTTP_Status):
def __call__(self, environ, start_response):
logger.info('WSGI change_password.__call__:')
+ if not self.check_referer(environ):
+ return self.bad_request(environ, start_response, 'denied')
+
# Get the user and password parameters from the request
content_type = environ.get('CONTENT_TYPE', '').lower()
if not content_type.startswith('application/x-www-form-urlencoded'):
@@ -1365,6 +1390,9 @@ class xmlserver_session(xmlserver, KerberosSession):
logger.debug('WSGI xmlserver_session.__call__:')
+ if not self.check_referer(environ):
+ return self.bad_request(environ, start_response, 'denied')
+
ccache_name = environ.get('KRB5CCNAME')
# Redirect to /ipa/xml if no Kerberos credentials
--
2.27.0

360
SOURCES/0027-Integration-tests-for-verifying-Referer-header-in-th.patch Normal file
View File

@ -0,0 +1,360 @@
From 48ec350051ead9c17e58a91405b3ab6935347f1b Mon Sep 17 00:00:00 2001
From: Rob Crittenden <rcritten@redhat.com>
Date: Thu, 12 Oct 2023 20:34:01 +0000
Subject: [PATCH 2/3] Integration tests for verifying Referer header in the UI
Validate that the change_password and login_password endpoints
verify the HTTP Referer header. There is some overlap in the
tests: belt and suspenders.
All endpoints except session/login_x509 are covered, sometimes
having to rely on expected bad results (see the i18n endpoint).
session/login_x509 is not tested yet as it requires significant
additional setup in order to associate a user certificate with
a user entry, etc.
This can be manually verified by modifying /etc/httpd/conf.d/ipa.conf
and adding:
Satisfy Any
Require all granted
Then comment out Auth and SSLVerify, etc. and restart httpd.
With a valid Referer will fail with a 401 and log that there is no
KRB5CCNAME. This comes after the referer check.
With an invalid Referer it will fail with a 400 Bad Request as
expected.
CVE-2023-5455
Signed-off-by: Rob Crittenden <rcritten@redhat.com>
(cherry picked from commit ef158764a97490211b9fe2e53f40826c3acfb19b)
---
ipatests/test_ipaserver/httptest.py | 7 +-
ipatests/test_ipaserver/test_changepw.py | 12 +-
.../test_ipaserver/test_login_password.py | 88 ++++++++++++
ipatests/test_ipaserver/test_referer.py | 136 ++++++++++++++++++
ipatests/util.py | 4 +-
5 files changed, 242 insertions(+), 5 deletions(-)
create mode 100644 ipatests/test_ipaserver/test_login_password.py
create mode 100644 ipatests/test_ipaserver/test_referer.py
diff --git a/ipatests/test_ipaserver/httptest.py b/ipatests/test_ipaserver/httptest.py
index 6cd034a71..8924798fc 100644
--- a/ipatests/test_ipaserver/httptest.py
+++ b/ipatests/test_ipaserver/httptest.py
@@ -36,7 +36,7 @@ class Unauthorized_HTTP_test:
content_type = 'application/x-www-form-urlencoded'
accept_language = 'en-us'
- def send_request(self, method='POST', params=None):
+ def send_request(self, method='POST', params=None, host=None):
"""
Send a request to HTTP server
@@ -45,7 +45,10 @@ class Unauthorized_HTTP_test:
if params is not None:
if self.content_type == 'application/x-www-form-urlencoded':
params = urllib.parse.urlencode(params, True)
- url = 'https://' + self.host + self.app_uri
+ if host:
+ url = 'https://' + host + self.app_uri
+ else:
+ url = 'https://' + self.host + self.app_uri
headers = {'Content-Type': self.content_type,
'Accept-Language': self.accept_language,
diff --git a/ipatests/test_ipaserver/test_changepw.py b/ipatests/test_ipaserver/test_changepw.py
index c3a47ab26..df38ddb3d 100644
--- a/ipatests/test_ipaserver/test_changepw.py
+++ b/ipatests/test_ipaserver/test_changepw.py
@@ -53,10 +53,11 @@ class test_changepw(XMLRPC_test, Unauthorized_HTTP_test):
request.addfinalizer(fin)
- def _changepw(self, user, old_password, new_password):
+ def _changepw(self, user, old_password, new_password, host=None):
return self.send_request(params={'user': str(user),
'old_password' : str(old_password),
'new_password' : str(new_password)},
+ host=host
)
def _checkpw(self, user, password):
@@ -89,6 +90,15 @@ class test_changepw(XMLRPC_test, Unauthorized_HTTP_test):
# make sure that password is NOT changed
self._checkpw(testuser, old_password)
+ def test_invalid_referer(self):
+ response = self._changepw(testuser, old_password, new_password,
+ 'attacker.test')
+
+ assert_equal(response.status, 400)
+
+ # make sure that password is NOT changed
+ self._checkpw(testuser, old_password)
+
def test_pwpolicy_error(self):
response = self._changepw(testuser, old_password, '1')
diff --git a/ipatests/test_ipaserver/test_login_password.py b/ipatests/test_ipaserver/test_login_password.py
new file mode 100644
index 000000000..9425cb797
--- /dev/null
+++ b/ipatests/test_ipaserver/test_login_password.py
@@ -0,0 +1,88 @@
+# Copyright (C) 2023 Red Hat
+# see file 'COPYING' for use and warranty information
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+import os
+import pytest
+import uuid
+
+from ipatests.test_ipaserver.httptest import Unauthorized_HTTP_test
+from ipatests.test_xmlrpc.xmlrpc_test import XMLRPC_test
+from ipatests.util import assert_equal
+from ipalib import api, errors
+from ipapython.ipautil import run
+
+testuser = u'tuser'
+password = u'password'
+
+
+@pytest.mark.tier1
+class test_login_password(XMLRPC_test, Unauthorized_HTTP_test):
+ app_uri = '/ipa/session/login_password'
+
+ @pytest.fixture(autouse=True)
+ def login_setup(self, request):
+ ccache = os.path.join('/tmp', str(uuid.uuid4()))
+ try:
+ api.Command['user_add'](uid=testuser, givenname=u'Test', sn=u'User')
+ api.Command['passwd'](testuser, password=password)
+ run(['kinit', testuser], stdin='{0}\n{0}\n{0}\n'.format(password),
+ env={"KRB5CCNAME": ccache})
+ except errors.ExecutionError as e:
+ pytest.skip(
+ 'Cannot set up test user: %s' % e
+ )
+
+ def fin():
+ try:
+ api.Command['user_del']([testuser])
+ except errors.NotFound:
+ pass
+ os.unlink(ccache)
+
+ request.addfinalizer(fin)
+
+ def _login(self, user, password, host=None):
+ return self.send_request(params={'user': str(user),
+ 'password' : str(password)},
+ host=host)
+
+ def test_bad_options(self):
+ for params in (
+ None, # no params
+ {"user": "foo"}, # missing options
+ {"user": "foo", "password": ""}, # empty option
+ ):
+ response = self.send_request(params=params)
+ assert_equal(response.status, 400)
+ assert_equal(response.reason, 'Bad Request')
+
+ def test_invalid_auth(self):
+ response = self._login(testuser, 'wrongpassword')
+
+ assert_equal(response.status, 401)
+ assert_equal(response.getheader('X-IPA-Rejection-Reason'),
+ 'invalid-password')
+
+ def test_invalid_referer(self):
+ response = self._login(testuser, password, 'attacker.test')
+
+ assert_equal(response.status, 400)
+
+ def test_success(self):
+ response = self._login(testuser, password)
+
+ assert_equal(response.status, 200)
+ assert response.getheader('X-IPA-Rejection-Reason') is None
diff --git a/ipatests/test_ipaserver/test_referer.py b/ipatests/test_ipaserver/test_referer.py
new file mode 100644
index 000000000..4eade8bba
--- /dev/null
+++ b/ipatests/test_ipaserver/test_referer.py
@@ -0,0 +1,136 @@
+# Copyright (C) 2023 Red Hat
+# see file 'COPYING' for use and warranty information
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+import os
+import pytest
+import uuid
+
+from ipatests.test_ipaserver.httptest import Unauthorized_HTTP_test
+from ipatests.test_xmlrpc.xmlrpc_test import XMLRPC_test
+from ipatests.util import assert_equal
+from ipalib import api, errors
+from ipapython.ipautil import run
+
+testuser = u'tuser'
+password = u'password'
+
+
+@pytest.mark.tier1
+class test_referer(XMLRPC_test, Unauthorized_HTTP_test):
+
+ @pytest.fixture(autouse=True)
+ def login_setup(self, request):
+ ccache = os.path.join('/tmp', str(uuid.uuid4()))
+ tokenid = None
+ try:
+ api.Command['user_add'](uid=testuser, givenname=u'Test', sn=u'User')
+ api.Command['passwd'](testuser, password=password)
+ run(['kinit', testuser], stdin='{0}\n{0}\n{0}\n'.format(password),
+ env={"KRB5CCNAME": ccache})
+ result = api.Command["otptoken_add"](
+ type='HOTP', description='testotp',
+ ipatokenotpalgorithm='sha512', ipatokenowner=testuser,
+ ipatokenotpdigits='6')
+ tokenid = result['result']['ipatokenuniqueid'][0]
+ except errors.ExecutionError as e:
+ pytest.skip(
+ 'Cannot set up test user: %s' % e
+ )
+
+ def fin():
+ try:
+ api.Command['user_del']([testuser])
+ api.Command['otptoken_del']([tokenid])
+ except errors.NotFound:
+ pass
+ os.unlink(ccache)
+
+ request.addfinalizer(fin)
+
+ def _request(self, params={}, host=None):
+ # implicit is that self.app_uri is set to the appropriate value
+ return self.send_request(params=params, host=host)
+
+ def test_login_password_valid(self):
+ """Valid authentication of a user"""
+ self.app_uri = "/ipa/session/login_password"
+ response = self._request(
+ params={'user': 'tuser', 'password': password})
+ assert_equal(response.status, 200, self.app_uri)
+
+ def test_change_password_valid(self):
+ """This actually changes the user password"""
+ self.app_uri = "/ipa/session/change_password"
+ response = self._request(
+ params={'user': 'tuser',
+ 'old_password': password,
+ 'new_password': 'new_password'}
+ )
+ assert_equal(response.status, 200, self.app_uri)
+
+ def test_sync_token_valid(self):
+ """We aren't testing that sync works, just that we can get there"""
+ self.app_uri = "/ipa/session/sync_token"
+ response = self._request(
+ params={'user': 'tuser',
+ 'first_code': '1234',
+ 'second_code': '5678',
+ 'password': 'password'})
+ assert_equal(response.status, 200, self.app_uri)
+
+ def test_i18n_messages_valid(self):
+ # i18n_messages requires a valid JSON request and we send
+ # nothing. If we get a 500 error then it got past the
+ # referer check.
+ self.app_uri = "/ipa/i18n_messages"
+ response = self._request()
+ assert_equal(response.status, 500, self.app_uri)
+
+ # /ipa/session/login_x509 is not tested yet as it requires
+ # significant additional setup.
+ # This can be manually verified by adding
+ # Satisfy Any and Require all granted to the configuration
+ # section and comment out all Auth directives. The request
+ # will fail and log that there is no KRB5CCNAME which comes
+ # after the referer check.
+
+ def test_endpoints_auth_required(self):
+ """Test endpoints that require pre-authorization which will
+ fail before we even get to the Referer check
+ """
+ self.endpoints = {
+ "/ipa/xml",
+ "/ipa/session/login_kerberos",
+ "/ipa/session/json",
+ "/ipa/session/xml"
+ }
+ for self.app_uri in self.endpoints:
+ response = self._request(host="attacker.test")
+
+ # referer is checked after auth
+ assert_equal(response.status, 401, self.app_uri)
+
+ def notest_endpoints_invalid(self):
+ """Pass in a bad Referer, expect a 400 Bad Request"""
+ self.endpoints = {
+ "/ipa/session/login_password",
+ "/ipa/session/change_password",
+ "/ipa/session/sync_token",
+ }
+ for self.app_uri in self.endpoints:
+ response = self._request(host="attacker.test")
+
+ assert_equal(response.status, 400, self.app_uri)
diff --git a/ipatests/util.py b/ipatests/util.py
index 929c3e899..61af0c40d 100644
--- a/ipatests/util.py
+++ b/ipatests/util.py
@@ -163,12 +163,12 @@ class ExceptionNotRaised(Exception):
return self.msg % self.expected.__name__
-def assert_equal(val1, val2):
+def assert_equal(val1, val2, msg=''):
"""
Assert ``val1`` and ``val2`` are the same type and of equal value.
"""
assert type(val1) is type(val2), '%r != %r' % (val1, val2)
- assert val1 == val2, '%r != %r' % (val1, val2)
+ assert val1 == val2, '%r != %r %r' % (val1, val2, msg)
def assert_not_equal(val1, val2):
--
2.27.0

11
SPECS/freeipa.spec
View File

@ -223,7 +223,7 @@
Name: %{package_name}
Version: %{IPA_VERSION}
Release: 4%{?rc_version:.%rc_version}%{?dist}.1.alma.1
Release: 5%{?rc_version:.%rc_version}%{?dist}.alma.1
Summary: The Identity, Policy and Audit system
License: GPL-3.0-or-later
@ -274,8 +274,12 @@ Patch0024: 0024-ipatests-fixture-can-produce-IndexError.patch
Patch0025: 0025-Installer-activate-nss-and-pam-services-in-sssd.conf.patch
# Patches were taken from:
# https://github.com/freeipa/freeipa/commit/363fd5de98e883800ac08b2760e8c3150783e7e2
Patch0026: 0026-Check-the-HTTP-Referer-header-on-all-requests.patch
# https://github.com/freeipa/freeipa/commit/48ec350051ead9c17e58a91405b3ab6935347f1b
Patch0027: 0027-Integration-tests-for-verifying-Referer-header-in-th.patch
# https://github.com/freeipa/freeipa/commit/f123b01d81696c52e9a4008d46e549864e4a8069
Patch0026: updates-add-ACIs-for-RBCD-self-management.patch
Patch0028: updates-add-ACIs-for-RBCD-self-management.patch
Patch1001: 1001-Change-branding-to-IPA-and-Identity-Management.patch
%endif
@ -1768,6 +1772,9 @@ fi
%endif
%changelog
* Thu Jan 11 2024 Andrew Lukoshko <alukoshko@almalinux.org> - 4.10.2-5.alma.1
- Resolves: Invalid CSRF protection (CVE-2023-5455)
* Tue Nov 07 2023 Eduard Abdullin <eabdullin@almalinux.org> - 4.10.2-4.1.alma.1
- updates: add ACIs for RBCD self-management