This commit adds some protections in InviteRedeemer to ensure that email
can never be nil, which could cause issues with inviting the invited
person to private topics since there was an incorrect inner join.
If the email is nil and the invite is scoped to an email, we just use
that invite.email unconditionally. If a redeeming_user (an existing
user) is passed in when redeeming an email, we use their email to
override the passed in email. Otherwise we just use the passed in
email. We now raise an error after all this if the email is still nil.
This commit also adds some tests to catch the private topic fix, and
some general improvements and comments around the invite code.
This commit also includes a migration to delete TopicAllowedUser records
for users who were mistakenly added to topics as part of the invite
redemption process.
Before this commit, we did not have guardian checks in place to determine if a
topic's title associated with a user badge should be displayed or not.
This means that the topic title of topics with restricted access
could be leaked to anon and users without access if certain conditions
are met. While we will not specify the conditions required, we have internally
assessed that the odds of meeting such conditions are low.
With this commit, we will now apply a guardian check to ensure that the
current user is able to see a topic before the topic's title is included
in the serialized object of a `UserBadge`.
Before this commit, there was no way for us to efficiently check an
array of topics for which a user can see. Therefore, this commit
introduces the `TopicGuardian#can_see_topic_ids` method which accepts an
array of `Topic#id`s and filters out the ids which the user is not
allowed to see. The `TopicGuardian#can_see_topic_ids` method is meant to
maintain feature parity with `TopicGuardian#can_see_topic?` at all
times so a consistency check has been added in our tests to ensure that
`TopicGuardian#can_see_topic_ids` returns the same result as
`TopicGuardian#can_see_topic?`. In the near future, the plan is for us
to switch to `TopicGuardian#can_see_topic_ids` completely but I'm not
doing that in this commit as we have to be careful with the performance
impact of such a change.
This method is currently not being used in the current commit but will
be relied on in a subsequent commit.
We are already caching any DB_HOST and REDIS_HOST (and their
accompanying replicas), we should also cache the resolved addresses for
the MessageBus specific Redis. This is a noop if no MB redis is defined
in config. A side effect is that the MB will also support SRV lookup and
priorities, following the same convention as the other cached services.
The port argument was added to redis_healthcheck so that the script
supports a setup where Redis is running on a non-default port.
Did some minor refactoring to improve readability when filtering out the
CRITICAL_HOST_ENV_VARS. The `select` block was a bit confusing, so the
sequence was made easier to follow.
We were coercing an environment variable to an int in a few places, so
the `env_as_int` method was introduced to do that coercion in one place and
for convenience purposes default to a value if provided.
See /t/68301/30.
There are situations where a container running Discourse may want to
cache the critical DNS services without running the cache_critical_dns
service, for example running migrations prior to running a full bore
application container.
Add a `--once` argument for the cache_critical_dns script that will
only execute the main loop once, and return the status code for the
script to use when exiting. 0 indicates no errors occured during SRV
resolution, and 1 indicates a failure during the SRV lookup.
Nothing is reported to prometheus in run_once mode. Generally this
mode of operation would be a part of a unix pipeline, in which the exit
status is a more meaningful and immediate signal than a prometheus metric.
The reporting has been moved into it's own method that can be called
only when the script is running as a service.
See /t/69597.
Describes the behaviour and configuration of the cache_critical_dns
script, mainly cribbed from commit messages. Tries to make this program
a bit less of an enigma.
The `PG::Connection#ping` method is only reliable for checking if the
given host is accepting connections, and not if the authentication
details are valid.
This extends the healthcheck to confirm that the auth details are
able to both create a connection and execute queries against the
database.
We expect the empty query to return an empty result set, so we can
assert on that. If a failure occurs for any reason, the healthcheck will
return false.
An SRV RR contains a priority value for each of the SRV targets that
are present, ranging from 0 - 65535. When caching SRV records we may want to
filter out any targets above or below a particular threshold.
This change adds support for specifying a lower and/or upper bound on
target priorities for any SRV RRs. Any targets returned when resolving
the SRV RR whose priority does not fall between the lower and upper
thresholds are ignored.
For example: Let's say we are running two Redis servers, a primary and
cold server as a backup (but not a replica). Both servers would pass health
checks, but clearly the primary should be preferred over the backup
server. In this case, we could configure our SRV RR with the primary
target as priority 1 and backup target as priority 10. The
`DISCOURSE_REDIS_HOST_SRV_LE` could then be set to 1 and the target with
priority 10 would be ignored.
See /t/66045.
This removes the option to override the sleep time between caching of
DNS records. The override was invalid because `''.to_i` is 0 in Ruby,
causing a tight loop calling the `run` method.
For Redis connections that operate over TLS, we need to ensure that we
are setting the correct arguments for the Redis client. We can utilise
the existing environment variable `DISCOURSE_REDIS_USE_SSL` to toggle
this behaviour.
No SSL verification is performed for two reasons:
- the Discourse application will perform a verification against any FQDN
as specified for the Redis host
- the healthcheck is run against the _resolved_ IP address for the Redis
hostname, and any SSL verification will always fail against a direct
IP address
If no SSL arguments are provided, the IP address is never cached against
the hostname as no healthy address is ever found in the HealthyCache.
Modify the cache_critical_dns script for SRV RR awareness. The new
behaviour is only enabled when one or more of the following environment
variables are present (and only for a host where the `DISCOURSE_*_HOST_SRV`
variable is present):
- `DISCOURSE_DB_HOST_SRV`
- `DISCOURSE_DB_REPLICA_HOST_SRV`
- `DISCOURSE_REDIS_HOST_SRV`
- `DISCOURSE_REDIS_REPLICA_HOST_SRV`
Some minor changes in refactor to original script behaviour:
- add Name and SRVName classes for storing resolved addresses for a hostname
- pass DNS client into main run loop instead of creating inside the loop
- ensure all times are UTC
- add environment override for system hosts file path and time between DNS
checks mainly for testing purposes
The environment variable for `BUNDLE_GEMFILE` is set to enables Ruby to
load gems that are installed and vendored via the project's Gemfile.
This script is usually not run from the project directory as it is
configured as a system service (see
71ba9fb7b5/templates/cache-dns.template.yml (L19))
and therefore cannot load gems like `pg` or `redis` from the default
load paths. Setting this environment variable configures bundler to look
in the correct project directory during it's setup phase.
When a `DISCOURSE_*_HOST_SRV` environment variable is present, the
decision for which target to cache is as follows:
- resolve the SRV targets for the provided hostname
- lookup the addresses for all of the resolved SRV targets via the
A and AAAA RRs for the target's hostname
- perform a protocol-aware healthcheck (PostgreSQL or Redis pings)
- pick the newest target that passes the healthcheck
From there, the resolved address for the SRV target is cached against
the hostname as specified by the original form of the environment
variable.
For example: The hostname specified by the `DISCOURSE_DB_HOST` record
is `database.example.com`, and the `DISCOURSE_DB_HOST_SRV` record is
`database._postgresql._tcp.sd.example.com`. An SRV RR lookup will return
zero or more targets. Each of the targets will be queried for A and AAAA
RRs. For each of the addresses returned, the newest address that passes
a protocol-aware healthcheck will be cached. This address is cached so
that if any newer address for the SRV target appears we can perform a
health check and prefer the newer address if the check passes.
All resolved SRV targets are cached for a minimum of 30 minutes in memory
so that we can prefer newer hosts over older hosts when more than one target
is returned. Any host in the cache that hasn't been seen for more than 30
minutes is purged.
See /t/61485.
Building does not persist the object in the database which is
unrealistic since we're mostly dealing with persisted objects in
production.
In theory, this will result our test suite taking longer to run since we
now have to write to the database. However, I don't expect the increase
to be significant and it is actually no different than us adding new
tests which fabricates more objects.
* SECURITY: moderator shouldn't be able to import a theme via API.
* DEV: apply `AdminConstraint` for all the "themes" routes.
Co-authored-by: Vinoth Kannan <svkn.87@gmail.com>
Adds limits to location and website fields at model and DB level to
match the bio_raw field limits. A limit cannot be added at the DB level
for bio_raw because it is a postgres text field.
The migration here uses version `6.1` instead of `7.0` since `stable`
is not on that version of rails yet, otherwise this is the same as `beta`
apart from also removing the new tests which caused too many conflicts.
Co-authored-by: Alan Guo Xiang Tan gxtan1990@gmail.com
Logging out failed when the current user was cached by an instance of `Auth::DefaultCurrentUserProvider` and `#log_off_user` was called on a different instance of that class.
Co-authored-by: Sam <sam.saffron@gmail.com>
This happened when a middleware accessed the `currentUser` before a controller had a chance to populate the `action_dispatch.request.path_parameters` env variable. In that case Discourse would always cache `nil` as `currentUser`.
In certain situations, a logged in user can redeem an invite with an email that
either doesn't match the invite's email or does not adhere to the email domain
restriction of an invite link. The impact of this flaw is aggrevated
when the invite has been configured to add the user that accepts the
invite into restricted groups.
Co-authored-by: Alan Guo Xiang Tan <gxtan1990@gmail.com>
When a site has `SiteSetting.invite_only` enabled, we create a
`ReviewableUser`record when activating a user if the user is not
approved. Therefore, we need to approve the user when redeeming an
invite.
There are some uncertainties surrounding why a `ReviewableRecord` is
created for a user in an invites only site but this commit does not seek
to address that.
Follow-up to 7c4e2d33fa
`run-qunit.js` does not expect QUnit tests to start automatically but
our wizard QUnit setup did not respect the `qunit_disable_auto_start`
URL param. Hence, tests would start running automatically and when a
subsequent `QUnit.start()` function call is made, we ended up getting a
`QUnit.start cannot be called inside a test context.` error.
This error can be consistently reproduced in the `discourse:discourse_test` container but not in
the local development environment. I do not know why and did not feel
like it is important at this point in time to know why.
This security fix affects sites which have `SiteSetting.must_approve_users`
enabled. There are intentional and unintentional cases where invited
users can be auto approved and are deemed to have skipped the staff approval process.
Instead of trying to reason about when auto-approval should happen, we have decided that
enabling the `must_approve_users` setting going forward will just mean that all new users
must be explicitly approved by a staff user in the review queue. The only case where users are auto
approved is when the `auto_approve_email_domains` site setting is used.
Co-authored-by: Alan Guo Xiang Tan <gxtan1990@gmail.com>
(Stable backport of 7ed899f)
There is a couple of layers of caching for theme JavaScript in Discourse:
The first layer is the `javascript_caches` table in the database. When a theme
with JavaScript files is installed, Discourse stores each one of the JavaScript
files in the `theme_fields` table, and then concatenates the files, compiles
them, computes a SHA1 digest of the compiled JavaScript and store the results
along with the SHA1 digest in the `javascript_caches` table.
Now when a request comes in, we need to render `<script>` tags for the
activated theme(s) of the site. To do this, we retrieve the `javascript_caches`
records of the activated themes and generate a `<script>` tag for each record.
The `src` attribute of these tags is a path to the `/theme-javascripts/:digest`
route which simply responds with the compiled JavaScript that has the requested
digest.
The second layer is a distributed cache whose purpose is to make rendering
`<script>` a lot more efficient. Without this cache, we'd have to query the
`javascript_caches` table to retrieve the SHA1 digests for every single
request. So we use this cache to store the `<script>` tags themselves so that
we only have to retrieve the `javascript_caches` records of the activated
themes for the first request and future requests simply get the cached
`<script>` tags.
What this commit does it ensures that the SHA1 digest in the
`javascript_caches` table stay the same across compilations by adding an order
by id clause to the query that loads the `theme_fields` records. Currently, we
specify no order when retrieving the `theme_fields` records so the order in
which they're retrieved can change across compilations and therefore cause the
SHA1 to change even though the individual records have not changed at all.
An inconsistent SHA1 digest across compilations can cause the database cache
and the distributed cache to have different digests and that causes the
JavaScript to fail to load (and if the theme heavily customizes the site, it
gives the impression that the site is broken) until the cache is cleared.
This can happen in busy sites when 2 concurrent requests recompile the
JavaScript files of a theme at the same time (this can happen when deploying a
new Discourse version) and request A updates the database cache after request B
did, and request B updates the distributed cache after request A did.
Internal ticket: t60783.
Co-authored-by: David Taylor <david@taylorhq.com>
Co-authored-by: Osama Sayegh <asooomaasoooma90@gmail.com>
The values in Discourse dropdown menus only come from admin-defined strings, not unsanitised end-user input, so this lack of escaping was not exploitable.
All current browser treat the HTML document (not the body element) as
the scrollable document element. Hence in all current browsers,
`document.body.scrollTop` returns 0. This commit removes all usage of
this property, because it is effectively 0.
Co-authored-by: David Taylor <david@taylorhq.com>
