Rustls is a modern TLS library written in Rust. `rustls::ConnectionCommon::complete_io` could fall into an infinite loop based on network input. When using a blocking rustls server, if a client send a `close_notify` message immediately after `client_hello`, the server's `complete_io` will get in an infinite loop. This vulnerability is fixed in 0.23.5, 0.22.4, and 0.21.11.
| Package (Ecosystem) | Introduced | Fixed | Limit |
|---|---|---|---|
| rustls(crates.io) | 0.23.0 | 0.23.5 | N/A |
| rustls(crates.io) | 0.22.0 | 0.22.4 | N/A |
| rustls(crates.io) | 0.21.0 | 0.21.11 | N/A |
| rustls(crates.io) | N/A | N/A | N/A |
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