Integrate apache mod reqtimeout use if requested

mig/install/apache-MiG-template.conf

@@ -181,6 +181,12 @@ Alias /status-events.json "__MIG_STATE__/wwwpublic/status-events.json"
     </FilesMatch>
 </IfModule>
 
+# Optional resource hogging prevention with default request timeouts.
+# Helps protect against slowloris-style attacks gradually depleting resources
+<IfModule mod_reqtimeout.c>
+    RequestReadTimeout header=20-40,MinRate=500 body=20,MinRate=500
+</IfModule>
+
 <IfModule mod_mime.c>
     # NOTE: workaround for broken double gzip decompression e.g. in Firefox.
     #       The bam files are in fact already gzip files and require care:

mig/install/apache-mimic-deb-template.conf

@@ -80,6 +80,9 @@ __JUPYTER_COMMENTED__ LoadModule lbmethod_byrequests_module modules/mod_lbmethod
 # Optional Header mangling if requested (for HSTS)
 __HSTS_COMMENTED__ LoadModule headers_module modules/mod_headers.so
 
+# Optional resource hogging prevention if requested (for mod reqtimeout)
+__ANTISLOWLORIS_COMMENTED__ LoadModule reqtimeout_module modules/mod_reqtimeout.so
+
 # Apparently we need this mime setup on Redhat to just run apache
 TypesConfig /etc/mime.types
 MIMEMagicFile conf/magic

mig/shared/install.py

@@ -1,3 +1,3 @@
 #!/usr/bin/python
 # -*- coding: utf-8 -*-
 #
@@ -20,7 +20,7 @@
 #
 # You should have received a copy of the GNU General Public License
 # along with this program; if not, write to the Free Software
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 #
 # -- END_HEADER ---
 #
@@ -49,7 +49,7 @@
 import subprocess
 import sys
 
 from mig.shared.base import force_native_str, force_utf8
 from mig.shared.defaults import default_http_port, default_https_port, \
     auth_openid_mig_db, auth_openid_ext_db, MIG_BASE, STRONG_TLS_CIPHERS, \
     STRONG_TLS_CURVES, STRONG_SSH_HOSTKEYALGOS, STRONG_SSH_KEXALGOS, \
@@ -62,11 +62,11 @@
 from mig.shared.fileio import read_file, read_file_lines, write_file, \
     write_file_lines
 from mig.shared.htmlgen import menu_items
 from mig.shared.jupyter import gen_balancer_proxy_template, gen_openid_template, \
     gen_rewrite_template
 from mig.shared.pwcrypto import password_requirements, make_simple_hash, \
     make_safe_hash
 from mig.shared.safeeval import subprocess_call, subprocess_popen, subprocess_pipe
 from mig.shared.safeinput import valid_alphanumeric, InputException
 from mig.shared.url import urlparse
 
@@ -88,9 +88,9 @@
 def transform_str_to_dict(input_str):
     """
     Transforms a string input into a Python literal or container.
     The function will only return the transformed object if it becomes a dictionary.
     input_str: The input string that is expected to be
      structured as a dictionary. A valid input_str for example could be '{'hello': 'world'}'.
     """
     try:
         output_dict = ast.literal_eval(input_str)
@@ -102,10 +102,10 @@
     return output_dict
 
 
 def determine_timezone(_environ=os.environ, _path_exists=os.path.exists, _print=print):
     """Attempt to detect the timezone in various known portable ways."""
 
     sys_timezone = None
 
     timezone_link = '/etc/localtime'
     timezone_cmd = ["/usr/bin/timedatectl", "status"]
@@ -167,7 +167,7 @@
 
 
 def fill_template(template_file, output_file, settings, eat_trailing_space=[],
                   additional=None):
     """Fill a configuration template using provided settings dictionary"""
     contents = read_file(template_file, None)
     if contents is None:
@@ -179,7 +179,7 @@
     for (variable, value) in settings.items():
         suffix = ''
         if variable in eat_trailing_space:
             suffix = '\s{0,1}'
         try:
             contents = re.sub(variable + suffix, value, contents)
         except Exception as exc:
@@ -199,10 +199,10 @@
     """ Insert into a configuration template using provided settings dictionary
     :param template_file: path to the template configuration file that should be
     modified with inserts
     :param insert_identifiers: dictionary, where the keys are used as search strings
     to find the index where the insert should take place. The values can either be a list
     of a single string
     :param unique: Whether the function should check whether the supplied value is
     already present in the template_file, if so it won't insert it
     :return: True/False based on whether an insert took place
     """
@@ -300,7 +300,7 @@
 ]
 
 
 def generate_confs(
     generateconfs_output_path,
     # NOTE: make sure command line args with white-space are properly wrapped
     generateconfs_command=subprocess.list2cmdline(sys.argv),
@@ -382,6 +382,7 @@
     enable_jupyter=False,
     enable_cloud=False,
     enable_hsts=True,
+    enable_antislowloris=False,
     enable_vhost_certs=False,
     enable_verify_certs=False,
     enable_seafile=False,
@@ -711,6 +712,7 @@
     enable_jupyter,
     enable_cloud,
     enable_hsts,
+    enable_antislowloris,
     enable_vhost_certs,
     enable_verify_certs,
     enable_seafile,
@@ -970,6 +972,7 @@
     user_dict['__ENABLE_JUPYTER__'] = "%s" % enable_jupyter
     user_dict['__ENABLE_CLOUD__'] = "%s" % enable_cloud
     user_dict['__ENABLE_HSTS__'] = "%s" % enable_hsts
+    user_dict['__ENABLE_ANTISLOWLORIS__'] = "%s" % enable_antislowloris
     user_dict['__ENABLE_VHOST_CERTS__'] = "%s" % enable_vhost_certs
     user_dict['__ENABLE_VERIFY_CERTS__'] = "%s" % enable_verify_certs
     user_dict['__ENABLE_SEAFILE__'] = "%s" % enable_seafile
@@ -1365,6 +1368,12 @@
     else:
         user_dict['__HSTS_COMMENTED__'] = '#'
 
+    # Enable apache reqtimeouts to kick idle clients if explicitly requested
+    if user_dict['__ENABLE_ANTISLOWLORIS__'].lower() == 'true':
+        user_dict['__ANTISLOWLORIS_COMMENTED__'] = ''
+    else:
+        user_dict['__ANTISLOWLORIS_COMMENTED__'] = '#'
+
     # Enable vhost-specific certificates only if explicitly requested
     if user_dict['__ENABLE_VHOST_CERTS__'].lower() == 'true':
         user_dict['__VHOSTCERTS_COMMENTED__'] = ''
@@ -1519,7 +1528,7 @@
 
     if user_dict['__ENABLE_JUPYTER__'].lower() == 'true':
         try:
             import requests
         except ImportError:
             print("ERROR: jupyter use requested but requests is not installed!")
             sys.exit(1)
@@ -1678,7 +1687,7 @@
 
     if user_dict['__ENABLE_CLOUD__'].lower() == 'true':
         try:
             import openstack
         except ImportError:
             print("ERROR: cloud use requested but openstack is not installed!")
             sys.exit(1)
@@ -1799,7 +1808,7 @@
     # Enable 2FA only if explicitly requested
     if user_dict['__ENABLE_TWOFACTOR__'].lower() == 'true':
         try:
             import pyotp
         except ImportError:
             print("ERROR: twofactor use requested but pyotp is not installed!")
             sys.exit(1)
@@ -1829,7 +1838,7 @@
     # Enable cracklib only if explicitly requested and installed
     if user_dict['__ENABLE_CRACKLIB__'].lower() == 'true':
         try:
             import cracklib
         except ImportError:
             print("ERROR: cracklib use requested but lib is not installed!")
             sys.exit(1)

tests/fixture/confs-stdlocal/MiG.conf

@@ -181,6 +181,12 @@ Alias /status-events.json "/home/mig/state/wwwpublic/status-events.json"
     </FilesMatch>
 </IfModule>
 
+# Optional resource hogging prevention with default request timeouts.
+# Helps protect against slowloris-style attacks gradually depleting resources
+<IfModule mod_reqtimeout.c>
+    RequestReadTimeout header=20-40,MinRate=500 body=20,MinRate=500
+</IfModule>
+
 <IfModule mod_mime.c>
     # NOTE: workaround for broken double gzip decompression e.g. in Firefox.
     #       The bam files are in fact already gzip files and require care:

tests/fixture/confs-stdlocal/mimic-deb.conf

@@ -80,6 +80,9 @@ LoadModule wsgi_module modules/mod_wsgi.so
 # Optional Header mangling if requested (for HSTS)
 LoadModule headers_module modules/mod_headers.so
 
+# Optional resource hogging prevention if requested (for mod reqtimeout)
+#LoadModule reqtimeout_module modules/mod_reqtimeout.so
+
 # Apparently we need this mime setup on Redhat to just run apache
 TypesConfig /etc/mime.types
 MIMEMagicFile conf/magic