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Use the federation blacklist for requests to untrusted Identity Servers #6000
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richvdh
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Sep 18, 2019
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Sep 19, 2019
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Slightly annoying is that this will prevent requests to a trusted account_threepid_delegate that may be running on an internal IP (that you may be using to handle MSISDNs). I can put a warning in the accounts_threepid_delegate section. It's just a bit annoying that I can't distinguish an |
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oh, hum. Use a different http client depending on where the id_server came from? |
Yeah, can do. |
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It was actually quite easy to check which calls were going to an actual identity server and which were going to delegates. I needed to rebase my changes on the latest MSC2290 stuff though, so that's now required before this can land. |
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richvdh
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Sep 23, 2019
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otherwise this looks plausible, but very fragile. It's very hard to tell which methods will use the blacklist, and which do not; in consequence it's going to be very easy to end up passing a user-specified id_server to a method which doesn't use the blacklist and causing a security hole.
Normally I'd ask for this to be refactored, but I think we just need to get this shipped.
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Synapse 1.4.0 (2019-10-03) ========================== Bugfixes -------- - Redact `client_secret` in server logs. ([\#6158](#6158)) Synapse 1.4.0rc2 (2019-10-02) ============================= Bugfixes -------- - Fix bug in background update that adds last seen information to the `devices` table, and improve its performance on Postgres. ([\#6135](#6135)) - Fix bad performance of censoring redactions background task. ([\#6141](#6141)) - Fix fetching censored redactions from DB, which caused APIs like initial sync to fail if it tried to include the censored redaction. ([\#6145](#6145)) - Fix exceptions when storing large retry intervals for down remote servers. ([\#6146](#6146)) Internal Changes ---------------- - Fix up sample config entry for `redaction_retention_period` option. ([\#6117](#6117)) Synapse 1.4.0rc1 (2019-09-26) ============================= Note that this release includes significant changes around 3pid verification. Administrators are reminded to review the [upgrade notes](UPGRADE.rst#upgrading-to-v140). Features -------- - Changes to 3pid verification: - Add the ability to send registration emails from the homeserver rather than delegating to an identity server. ([\#5835](#5835), [\#5940](#5940), [\#5993](#5993), [\#5994](#5994), [\#5868](#5868)) - Replace `trust_identity_server_for_password_resets` config option with `account_threepid_delegates`, and make the `id_server` parameteter optional on `*/requestToken` endpoints, as per [MSC2263](matrix-org/matrix-spec-proposals#2263). ([\#5876](#5876), [\#5969](#5969), [\#6028](#6028)) - Switch to using the v2 Identity Service `/lookup` API where available, with fallback to v1. (Implements [MSC2134](matrix-org/matrix-spec-proposals#2134) plus `id_access_token authentication` for v2 Identity Service APIs from [MSC2140](matrix-org/matrix-spec-proposals#2140)). ([\#5897](#5897)) - Remove `bind_email` and `bind_msisdn` parameters from `/register` ala [MSC2140](matrix-org/matrix-spec-proposals#2140). ([\#5964](#5964)) - Add `m.id_access_token` to `unstable_features` in `/versions` as per [MSC2264](matrix-org/matrix-spec-proposals#2264). ([\#5974](#5974)) - Use the v2 Identity Service API for 3PID invites. ([\#5979](#5979)) - Add `POST /_matrix/client/unstable/account/3pid/unbind` endpoint from [MSC2140](matrix-org/matrix-spec-proposals#2140) for unbinding a 3PID from an identity server without removing it from the homeserver user account. ([\#5980](#5980), [\#6062](#6062)) - Use `account_threepid_delegate.email` and `account_threepid_delegate.msisdn` for validating threepid sessions. ([\#6011](#6011)) - Allow homeserver to handle or delegate email validation when adding an email to a user's account. ([\#6042](#6042)) - Implement new Client Server API endpoints `/account/3pid/add` and `/account/3pid/bind` as per [MSC2290](matrix-org/matrix-spec-proposals#2290). ([\#6043](#6043)) - Add an unstable feature flag for separate add/bind 3pid APIs. ([\#6044](#6044)) - Remove `bind` parameter from Client Server POST `/account` endpoint as per [MSC2290](matrix-org/matrix-spec-proposals#2290). ([\#6067](#6067)) - Add `POST /add_threepid/msisdn/submit_token` endpoint for proxying submitToken on an `account_threepid_handler`. ([\#6078](#6078)) - Add `submit_url` response parameter to `*/msisdn/requestToken` endpoints. ([\#6079](#6079)) - Add `m.require_identity_server` flag to /version's unstable_features. ([\#5972](#5972)) - Enhancements to OpenTracing support: - Make OpenTracing work in worker mode. ([\#5771](#5771)) - Pass OpenTracing contexts between servers when transmitting EDUs. ([\#5852](#5852)) - OpenTracing for device list updates. ([\#5853](#5853)) - Add a tag recording a request's authenticated entity and corresponding servlet in OpenTracing. ([\#5856](#5856)) - Add minimum OpenTracing for client servlets. ([\#5983](#5983)) - Check at setup that OpenTracing is installed if it's enabled in the config. ([\#5985](#5985)) - Trace replication send times. ([\#5986](#5986)) - Include missing OpenTracing contexts in outbout replication requests. ([\#5982](#5982)) - Fix sending of EDUs when OpenTracing is enabled with an empty whitelist. ([\#5984](#5984)) - Fix invalid references to None while OpenTracing if the log context slips. ([\#5988](#5988), [\#5991](#5991)) - OpenTracing for room and e2e keys. ([\#5855](#5855)) - Add OpenTracing span over HTTP push processing. ([\#6003](#6003)) - Add an admin API to purge old rooms from the database. ([\#5845](#5845)) - Retry well-known lookups if we have recently seen a valid well-known record for the server. ([\#5850](#5850)) - Add support for filtered room-directory search requests over federation ([MSC2197](matrix-org/matrix-spec-proposals#2197), in order to allow upcoming room directory query performance improvements. ([\#5859](#5859)) - Correctly retry all hosts returned from SRV when we fail to connect. ([\#5864](#5864)) - Add admin API endpoint for setting whether or not a user is a server administrator. ([\#5878](#5878)) - Enable cleaning up extremities with dummy events by default to prevent undue build up of forward extremities. ([\#5884](#5884)) - Add config option to sign remote key query responses with a separate key. ([\#5895](#5895)) - Add support for config templating. ([\#5900](#5900)) - Users with the type of "support" or "bot" are no longer required to consent. ([\#5902](#5902)) - Let synctl accept a directory of config files. ([\#5904](#5904)) - Increase max display name size to 256. ([\#5906](#5906)) - Add admin API endpoint for getting whether or not a user is a server administrator. ([\#5914](#5914)) - Redact events in the database that have been redacted for a week. ([\#5934](#5934)) - New prometheus metrics: - `synapse_federation_known_servers`: represents the total number of servers your server knows about (i.e. is in rooms with), including itself. Enable by setting `metrics_flags.known_servers` to True in the configuration.([\#5981](#5981)) - `synapse_build_info`: exposes the Python version, OS version, and Synapse version of the running server. ([\#6005](#6005)) - Give appropriate exit codes when synctl fails. ([\#5992](#5992)) - Apply the federation blacklist to requests to identity servers. ([\#6000](#6000)) - Add `report_stats_endpoint` option to configure where stats are reported to, if enabled. Contributed by @Sorunome. ([\#6012](#6012)) - Add config option to increase ratelimits for room admins redacting messages. ([\#6015](#6015)) - Stop sending federation transactions to servers which have been down for a long time. ([\#6026](#6026)) - Make the process for mapping SAML2 users to matrix IDs more flexible. ([\#6037](#6037)) - Return a clearer error message when a timeout occurs when attempting to contact an identity server. ([\#6073](#6073)) - Prevent password reset's submit_token endpoint from accepting trailing slashes. ([\#6074](#6074)) - Return 403 on `/register/available` if registration has been disabled. ([\#6082](#6082)) - Explicitly log when a homeserver does not have the `trusted_key_servers` config field configured. ([\#6090](#6090)) - Add support for pruning old rows in `user_ips` table. ([\#6098](#6098)) Bugfixes -------- - Don't create broken room when `power_level_content_override.users` does not contain `creator_id`. ([\#5633](#5633)) - Fix database index so that different backup versions can have the same sessions. ([\#5857](#5857)) - Fix Synapse looking for config options `password_reset_failure_template` and `password_reset_success_template`, when they are actually `password_reset_template_failure_html`, `password_reset_template_success_html`. ([\#5863](#5863)) - Fix stack overflow when recovering an appservice which had an outage. ([\#5885](#5885)) - Fix error message which referred to `public_base_url` instead of `public_baseurl`. Thanks to @aaronraimist for the fix! ([\#5909](#5909)) - Fix 404 for thumbnail download when `dynamic_thumbnails` is `false` and the thumbnail was dynamically generated. Fix reported by rkfg. ([\#5915](#5915)) - Fix a cache-invalidation bug for worker-based deployments. ([\#5920](#5920)) - Fix admin API for listing media in a room not being available with an external media repo. ([\#5966](#5966)) - Fix list media admin API always returning an error. ([\#5967](#5967)) - Fix room and user stats tracking. ([\#5971](#5971), [\#5998](#5998), [\#6029](#6029)) - Return a `M_MISSING_PARAM` if `sid` is not provided to `/account/3pid`. ([\#5995](#5995)) - `federation_certificate_verification_whitelist` now will not cause `TypeErrors` to be raised (a regression in 1.3). Additionally, it now supports internationalised domain names in their non-canonical representation. ([\#5996](#5996)) - Only count real users when checking for auto-creation of auto-join room. ([\#6004](#6004)) - Ensure support users can be registered even if MAU limit is reached. ([\#6020](#6020)) - Fix bug where login error was shown incorrectly on SSO fallback login. ([\#6024](#6024)) - Fix bug in calculating the federation retry backoff period. ([\#6025](#6025)) - Prevent exceptions being logged when extremity-cleanup events fail due to lack of user consent to the terms of service. ([\#6053](#6053)) - Remove POST method from password-reset `submit_token` endpoint until we implement `submit_url` functionality. ([\#6056](#6056)) - Fix logcontext spam on non-Linux platforms. ([\#6059](#6059)) - Ensure query parameters in email validation links are URL-encoded. ([\#6063](#6063)) - Fix a bug which caused SAML attribute maps to be overridden by defaults. ([\#6069](#6069)) - Fix the logged number of updated items for the `users_set_deactivated_flag` background update. ([\#6092](#6092)) - Add `sid` to `next_link` for email validation. ([\#6097](#6097)) - Threepid validity checks on msisdns should not be dependent on `threepid_behaviour_email`. ([\#6104](#6104)) - Ensure that servers which are not configured to support email address verification do not offer it in the registration flows. ([\#6107](#6107)) Updates to the Docker image --------------------------- - Avoid changing `UID/GID` if they are already correct. ([\#5970](#5970)) - Provide `SYNAPSE_WORKER` envvar to specify python module. ([\#6058](#6058)) Improved Documentation ---------------------- - Convert documentation to markdown (from rst) ([\#5849](#5849)) - Update `INSTALL.md` to say that Python 2 is no longer supported. ([\#5953](#5953)) - Add developer documentation for using SAML2. ([\#6032](#6032)) - Add some notes on rolling back to v1.3.1. ([\#6049](#6049)) - Update the upgrade notes. ([\#6050](#6050)) Deprecations and Removals ------------------------- - Remove shared-secret registration from `/_matrix/client/r0/register` endpoint. Contributed by Awesome Technologies Innovationslabor GmbH. ([\#5877](#5877)) - Deprecate the `trusted_third_party_id_servers` option. ([\#5875](#5875)) Internal Changes ---------------- - Lay the groundwork for structured logging output. ([\#5680](#5680)) - Retry well-known lookup before the cache expires, giving a grace period where the remote well-known can be down but we still use the old result. ([\#5844](#5844)) - Remove log line for debugging issue #5407. ([\#5860](#5860)) - Refactor the Appservice scheduler code. ([\#5886](#5886)) - Compatibility with v2 Identity Service APIs other than /lookup. ([\#5892](#5892), [\#6013](#6013)) - Stop populating some unused tables. ([\#5893](#5893), [\#6047](#6047)) - Add missing index on `users_in_public_rooms` to improve the performance of directory queries. ([\#5894](#5894)) - Improve the logging when we have an error when fetching signing keys. ([\#5896](#5896)) - Add support for database engine-specific schema deltas, based on file extension. ([\#5911](#5911)) - Update Buildkite pipeline to use plugins instead of buildkite-agent commands. ([\#5922](#5922)) - Add link in sample config to the logging config schema. ([\#5926](#5926)) - Remove unnecessary parentheses in return statements. ([\#5931](#5931)) - Remove unused `jenkins/prepare_sytest.sh` file. ([\#5938](#5938)) - Move Buildkite pipeline config to the pipelines repo. ([\#5943](#5943)) - Remove unnecessary return statements in the codebase which were the result of a regex run. ([\#5962](#5962)) - Remove left-over methods from v1 registration API. ([\#5963](#5963)) - Cleanup event auth type initialisation. ([\#5975](#5975)) - Clean up dependency checking at setup. ([\#5989](#5989)) - Update OpenTracing docs to use the unified `trace` method. ([\#5776](#5776)) - Small refactor of function arguments and docstrings in` RoomMemberHandler`. ([\#6009](#6009)) - Remove unused `origin` argument on `FederationHandler.add_display_name_to_third_party_invite`. ([\#6010](#6010)) - Add a `failure_ts` column to the `destinations` database table. ([\#6016](#6016), [\#6072](#6072)) - Clean up some code in the retry logic. ([\#6017](#6017)) - Fix the structured logging tests stomping on the global log configuration for subsequent tests. ([\#6023](#6023)) - Clean up the sample config for SAML authentication. ([\#6064](#6064)) - Change mailer logging to reflect Synapse doesn't just do chat notifications by email now. ([\#6075](#6075)) - Move last-seen info into devices table. ([\#6089](#6089)) - Remove unused parameter to `get_user_id_by_threepid`. ([\#6099](#6099)) - Refactor the user-interactive auth handling. ([\#6105](#6105)) - Refactor code for calculating registration flows. ([\#6106](#6106))
babolivier
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Sep 1, 2021
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Uses a
SimpleHttpClientinstance equipped with thefederation_ip_range_blacklistlist for requests to identity servers provided by user input. Does not use a blacklist when contacting identity servers specified byaccount_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
Requires #6043CI won't pass til #6043 is merged.