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Use the federation blacklist for requests to untrusted Identity Servers (#6000)

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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
This commit is contained in:
Andrew Morgan 2019-09-23 21:23:20 +02:00 • committed by Richard van der Hoff
parent 1ea3ed7620
commit e08ea43463
5 changed files with 28 additions and 4 deletions
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7
synapse/handlers/room_member.py
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@ -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