CVE-2023-38697

Summary

CVE-2023-38697 affects the protocol-http1 implementation in that it fails to adhere to certain guidelines in RFC 9112, specifically regarding the format of Content-Length headers and chunk sizes. Falcon, the affected software, accepts headers with a `+` prefix or hexadecimal values prefixed with `0x`, as well as LF characters in chunk extensions. These deviations from the standard can cause desynchronization between HTTP parsers, potentially leading to HTTP request smuggling and firewall bypassing. The issue is resolved in version 0.15.1 of protocol-http1, and no known workarounds exist.

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