جزئیات آسیب‌پذیری

Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, The shared WebSocket decoder permits unbounded message buffering because defragmentation accumulates fragments without a limit and FrameTranscoder accepts declared lengths up to Int.MaxValue. A remote client that completes a WebSocket handshake against an http4s-blaze-server or http4s-ember-server endpoint can exhaust server memory with oversized frames or fragmented messages. The patched decoder applies a configurable 64 MiB default limit to individual frames and defragmented messages through EmberServerBuilder.withMaxWebSocketMessageSize. This issue is fixed in versions 0.23.35 and 1.0.0-M47.

• https://github.com/http4s/http4s/security/advisories/GHSA-jrxx-w2m8-5hf5 x_refsource_CONFIRM
• https://github.com/http4s/http4s/commit/d578c3c9da6193627d40fa785e612cda7fcd77b3 x_refsource_MISC
• https://github.com/http4s/http4s/releases/tag/v0.23.35 x_refsource_MISC
• https://github.com/http4s/http4s/releases/tag/v1.0.0-M47 x_refsource_MISC