gitoxide does not detect SHA-1 collision attacks

Vulnerability Description

gitoxide is an implementation of git written in Rust. Before 0.42.0, gitoxide uses SHA-1 hash implementations without any collision detection, leaving it vulnerable to hash collision attacks. gitoxide uses the sha1_smol or sha1 crate, both of which implement standard SHA-1 without any mitigations for collision attacks. This means that two distinct Git objects with colliding SHA-1 hashes would break the Git object model and integrity checks when used with gitoxide. This vulnerability is fixed in 0.42.0.

References

• https://github.com/GitoxideLabs/gitoxide/security/advisories/GHSA-2frx-2596-x5r6
• https://github.com/GitoxideLabs/gitoxide/commit/f253f02a6658b3b7612a50d56c71f5ae4da4ca21