GHSA-2x63-gw47-w4mm

Dashboard / Vulnerabilities / GHSA-2x63-gw47-w4mm

GHSA-2x63-gw47-w4mm

Summary: websocket-driver-ruby: Denial of service via malformed Host header

Details: ### Impact If this library is used to implement a WebSocket server on top of a TCP server, by using the `WebSocket::Driver.server()` method, then a client can cause the server to crash by sending a `Host` header that is not a valid `host[:port]` string. When this happens, a `URI::InvalidURIError` exception is raised which is not caught, and this can cause the server process to crash if the application does not catch the error from the `parse()` method itself. ### Patches The issue has been patched in version 0.8.2 by making the request parser catch `URI::InvalidURIError` and enter an error state if the `Host` header is malformed. This means the request is considered invalid and should not establish a WebSocket connection. ### Workarounds No known workarounds exist. ### Acknowledgements This issue was discovered and reported by Pranjali Thakur, DepthFirst Security Research Team.

References: https://github.com/faye/websocket-driver-ruby/security/advisories/GHSA-2x63-gw47-w4mm, https://github.com/faye/websocket-driver-ruby/commit/7d6fd87759a2fdc83590d3b49ffa661dc53fa128, https://github.com/faye/websocket-driver-ruby