Introspection in schema validation in Apollo Server
We encourage all users of Apollo Server to read this advisory in its entirety to understand the impact. The Resolution section contains details on patched versions.
Impact
If subscriptions: false is passed to the ApolloServer constructor options, there is no impact. If implementors were not expecting validation rules to be enforced on the WebSocket subscriptions transport and are unconcerned about introspection being enabled on the WebSocket subscriptions transport (or were not expecting that), then this advisory is not applicable. If introspection: true is passed to the ApolloServer constructor options, the impact is limited to user-provided validation rules (i.e., using validationRules) since there would be no expectation that introspection was disabled.
The enforcement of user-provided validation rules on the HTTP transport is working as intended and is unaffected by this advisory. Similarly, disabling introspection on the HTTP transport is working as intended and is unaffected by this advisory.
> Note: Unless subscriptions: false is explicitly passed to the constructor parameters of new ApolloServer({ ... }), subscriptions are enabled by default, whether or not there is a Subscription type present in the schema. As an alternative to upgrading to a patched version, see the Workarounds section below to disable subscriptions if it is not necessary.
In cases where subscriptions: false is not explicitly set, the subscription server is impacted since validation rules which are enforced on the main request pipeline within Apollo Server were not being passed to the SubscriptionServer.create invocation (seen here, prior to the patch).
The omitted validation rules for the subscription server include any validationRules passed by implementors to the ApolloServer constructor which were expected to be enforced on the subscriptions WebSocket endpoint. Additionally, because an internal NoIntrospection validation rule is used to disable introspection, it would have been possible to introspect a server on the WebSocket endpoint that the SubscriptionServer creates even though it was not possible on other transports (e.g. HTTP).
The severity of risk depends on whether sensitive information is being stored in the schema itself. The contents of schema descriptions, or secrets which might be revealed by the names of types or field names within those types, will determine the risk to individual implementors.
Affected packages
The bug existed in apollo-server-core versions prior to version 2.14.2, however, this means all integration packages (e.g., apollo-server-express, etc.) prior to version 2.14.2 which depend on apollo-server-core for their subscriptions support are affected. This includes the apollo-server package that automatically provides an Express server.
The version headers in this history reflect the versions of Apollo Server itself. Versions of other packages (e.g., those which are not actual HTTP integrations; packages not prefixed with "apollo-server", or just supporting packages) may use different versions.
🆕 Please Note!: 🆕 The @apollo/federation and @apollo/gateway packages now live in the apollographql/federation repository.
apollo-server-env: Update Headers.values() type to match what node-fetch actually does and what the Fetch spec says it should be, and what @types/node-fetchfinally gets correct. [PR #5537](apollographql/apollo-server#5537)
v3.1.0
apollo-server-core: If a client does not provide a value or provides null for a variable declared to be non-null, this is now reported as an error with an extensions.code of BAD_USER_INPUT rather than INTERNAL_SERVER_ERROR. (This is similar to a change we made in v2.23.0 for variables that are sent as the wrong type.) [PR #5508](apollographql/apollo-server#5508) [Issue #5353](apollographql/apollo-server#5353)
apollo-server-core/apollo-server-plugin-base: Add support for schemaDidLoadOrUpdate event hooks, to be specified by the serverWillStart event hook. Plugins listening for this event will receive the API schema (and core schema for gateways) when the server's schema is initially loaded and when the server's schema is updated. For more information about this plugin event, see the plugin event reference documentation. [PR #5187](apollographql/apollo-server#5187)
apollo-server-core: Add support for schema reporting when using Apollo Gateway. At the time of this package's release, Apollo Studio does not yet support schema reporting from gateways, so you should not use this feature yet for gateways (unless instructed otherwise by Apollo staff or by the Studio docs). If you do enable schema reporting for a gateway, the version of @apollo/gateway must be at least 0.35.0 , or else start() will error. [PR #5187](apollographql/apollo-server#5187)
apollo-server-core: Support gateways without executors, to help with mocking gateways. Note that if you have a custom GatewayInterface implementation, Apollo Server will now honor the executor returned from load and will ignore the executor method on the gateway itself. See the PR for details. [PR #5539](apollographql/apollo-server#5539)
apollo-server-plugin-response-cache, apollo-server-plugin-operation-registry: Change how the default export from the package is set up to fix errors with some build tools. [PR #5542](apollographql/apollo-server#5542)
v3.0.2
apollo-server-types: TypeScript typings for info.cacheControl are now added to GraphQLResolveInfo as part of apollo-server-types rather than a nested file in apollo-server-core, and the field now has a named type, ResolveInfoCacheControl. [PR #5512](apollographql/apollo-server#5512)
apollo-server-micro: Like the other framework integrations, only serve landing pages from the GraphQL path (/graphql by default, configurable via the path option to createHandler). [PR #5516](apollographql/apollo-server#5516)
apollo-server-env: Remove polyfills of Object.values, Object.entries, and util.promisify which were only required for Node 6 support. Remove ValueOrPromise and WithRequired TypeScript types that are also provided by apollo-server-types. [PR #5515](apollographql/apollo-server#5515)
v3.0.1
apollo-server-core: The default maxAge (which defaults to 0) for a field should only be applied if no dynamic cache control hint is set. Specifically, if you call the (new in 3.0.0) function info.cacheControl.cacheHint.restrict({ maxAge: 60 }), it should set maxAge to 60 even if the default max age is lower. (This bug fix is the behavior that was intended for 3.0.0, and primarily affects the behavior of functions added in Apollo Server 3. This does mean that checking info.cacheControl.cacheHint now only shows explicitly-set maxAge and not the default, but this seems like it will be helpful since it lets you differentiate between the two similar circumstances.) [PR #5492](apollographql/apollo-server#5492)
apollo-server-lambda: Fix TypeScript types for context function. (In 3.0.0, the TS types for the context function were accidentally inherited from apollo-server-express instead of using the correct Lambda-specific types). [PR #5481](apollographql/apollo-server#5481)
apollo-server-lambda, apollo-server-cloud-functions: Make the default URL path for handling GraphQL be / (ie, handle all requests). This is similar to how these packages work in Apollo Server 2. After this change, apollo-server and the serverless integrations have a default URL path of / (or ignore the path entirely, in the case of apollo-server-azure-functions), and the framework integrations have a default URL path of /graphql. This is a backwards-incompatible change from 3.0.1 but minimizes the changes from Apollo Server 2 (and this AS3 change was not intended or documented). [PR #5497](apollographql/apollo-server#5497) [Issue #5462](apollographql/apollo-server#5462)
v3.0.0
BREAKING CHANGES
Apollo Server 3 contains quite a few breaking changes. Read our migration guide for more details on how to update your app.
Bumped dependencies
The minimum versions of these dependencies have been bumped to provide an improved foundation for the development of future features.
Dropped support for Node.js v6, v8 and v10. Apollo Server 3.x is being compiled to ES2020, which maps to Node.js 12+.
Note also that we only test Apollo Server on even-numbered versions of Node.js, and we only aim to support Node.js versions that are under long-term support from the Node.js Foundation.
Dropped support for versions of the graphql library prior to 15.3.0.
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Bumps apollo-server-cache-memcached from 0.6.7 to 3.0.3. This update includes a security fix.
Vulnerabilities fixed
Sourced from The GitHub Security Advisory Database.
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