CVE-2024-23644 Information

Description

Trillium is a composable toolkit for building internet applications with async rust. In trillium-http prior to 0.3.12 and trillium-client prior to 0.5.4 insufficient validation of outbound header values may lead to request splitting or response splitting attacks in scenarios where attackers have sufficient control over headers. This only affects use cases where attackers have control of request headers and can insert \ \n\ sequences. Specifically if untrusted and unvalidated input is inserted into header names or values.

Outbound trillium_http::HeaderValue and trillium_http::HeaderName can be constructed infallibly and were not checked for illegal bytes when sending requests from the client or responses from the server. Thus if an attacker has sufficient control over header values (or names) in a request or response that they could inject \r\n sequences they could get the client and server out of sync and then pivot to gain control over other parts of requests or responses. (i.e. exfiltrating data from other requests SSRF etc.)

In trillium-http versions 0.3.12 and later if a header name is invalid in server response headers the specific header and any associated values are omitted from network transmission. Additionally if a header value is invalid in server response headers the individual header value is omitted from network transmission. Other headers values with the same header name will still be sent. In trillium-client versions 0.5.4 and later if any header name or header value is invalid in the client request headers awaiting the client Conn returns an Error::MalformedHeader prior to any network access. As a workaround Trillium services and client applications should sanitize or validate untrusted input that is included in header values and header names. Carriage return newline and null characters are not allowed.

Reference

https://github.com/trillium-rs/trillium/security/advisories/GHSA-9f9p-cp3c-72jf https://github.com/trillium-rs/trillium/commit/16a42b3f8378a3fa4e61ece3e3e37e6a530df51d https://github.com/trillium-rs/trillium/commit/8d468f85e27b8d0943d6f43ce9f8c7397141a999