GHSA-r344-xw3p-2frj

Apollo Router vulnerable to Improper Check or Handling of Exceptional Conditions

### Impact The Apollo Router is a configurable, high-performance graph router written in Rust to run a federated supergraph that uses Apollo Federation. Affected versions are subject to a Denial-of-Service (DoS) type vulnerability which causes the Router to panic and terminate when a multi-part response is sent. When users send queries to the router that uses the `@defer` or Subscriptions, the Router will panic. To be vulnerable, users of Router must have a coprocessor with `coprocessor.supergraph.response` configured in their `router.yaml` and also to support either `@defer` or Subscriptions. ### Patches Router version 1.33.0 has a fix for this vulnerability. https://github.com/apollographql/router/pull/4014 fixes the issue. ### Workarounds For affected versions, avoid using the coprocessor supergraph response: ```yml # do not use this stage in your coprocessor configuration coprocessor: supergraph: response: ``` Or you can disable defer and subscriptions support: ```yml # disable defer and subscriptions: supergraph: defer_support: false # enabled by default subscription: enabled: false # disabled by default ``` and continue to use the coprocessor supergraph response. ### References https://github.com/apollographql/router/issues/4013