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RUSTSEC-2023-0003

git2 does not verify SSH keys by default

Reported
Issued
Package
libgit2-sys (crates.io)
Type
Vulnerability
Categories
Keywords
#ssh #mitm #git
Aliases
Details
https://github.com/rust-lang/git2-rs/security/advisories/GHSA-m4ch-rfv5-x5g3
Patched
  • >=0.13.5, <0.14.0
  • >=0.14.2

Description

The git2 and libgit2-sys crates are Rust wrappers around the libgit2 C library. It was discovered that libgit2 1.5.0 and below did not verify SSH host keys when establishing an SSH connection, exposing users of the library to Man-In-the-Middle attacks.

The libgit2 team assigned CVE-2023-22742 to this vulnerability. The following versions of the libgit2-sys Rust crate have been released:

A new git2 crate version has also been released, 0.16.1. This version only bumps its libgit2-sys dependency to ensure no vulnerable libgit2-sys versions are used, but contains no code changes: if you update the libgit2-sys version there is no need to also update the git2 crate version.

You can learn more about this vulnerability in libgit2's advisory