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authorAndrew Morgan <1342360+anoadragon453@users.noreply.github.com>2019-09-23 21:23:20 +0200
committerRichard van der Hoff <1389908+richvdh@users.noreply.github.com>2019-09-23 20:23:20 +0100
commite08ea43463bacd5efacbf6c790c6be0f3cd06ce6 (patch)
tree19f98e18e1ea719bc533b653a3e57c96e7e98fe5 /synapse/handlers/room_member.py
parentAdd m.id_access_token to /versions unstable_features (MSC2264) (#5974) (diff)
downloadsynapse-e08ea43463bacd5efacbf6c790c6be0f3cd06ce6.tar.xz
Use the federation blacklist for requests to untrusted Identity Servers (#6000)
Uses a SimpleHttpClient instance equipped with the federation_ip_range_blacklist list for requests to identity servers provided by user input. Does not use a blacklist when contacting identity servers specified by account_threepid_delegates. The homeserver trusts the latter and we don't want to prevent homeserver admins from specifying delegates that are on internal IP addresses.

Fixes #5935
Diffstat (limited to 'synapse/handlers/room_member.py')
-rw-r--r--synapse/handlers/room_member.py7
1 files changed, 6 insertions, 1 deletions
diff --git a/synapse/handlers/room_member.py b/synapse/handlers/room_member.py
index 39df0f128d..94cd0cf3ef 100644
--- a/synapse/handlers/room_member.py
+++ b/synapse/handlers/room_member.py
@@ -31,6 +31,7 @@ from synapse import types
 from synapse.api.constants import EventTypes, Membership
 from synapse.api.errors import AuthError, Codes, HttpResponseException, SynapseError
 from synapse.handlers.identity import LookupAlgorithm, create_id_access_token_header
+from synapse.http.client import SimpleHttpClient
 from synapse.types import RoomID, UserID
 from synapse.util.async_helpers import Linearizer
 from synapse.util.distributor import user_joined_room, user_left_room
@@ -62,7 +63,11 @@ class RoomMemberHandler(object):
         self.auth = hs.get_auth()
         self.state_handler = hs.get_state_handler()
         self.config = hs.config
-        self.simple_http_client = hs.get_simple_http_client()
+        # We create a blacklisting instance of SimpleHttpClient for contacting identity
+        # servers specified by clients
+        self.simple_http_client = SimpleHttpClient(
+            hs, ip_blacklist=hs.config.federation_ip_range_blacklist
+        )
 
         self.federation_handler = hs.get_handlers().federation_handler
         self.directory_handler = hs.get_handlers().directory_handler