libgit2 fails to verify SSH keys by default
Summary
libgit2 fails to verify SSH keys by default
Original description
The description as published by the source.
libgit2 is a cross-platform, linkable library implementation of Git. When using an SSH remote with the optional libssh2 backend, libgit2 does not perform certificate checking by default. Prior versions of libgit2 require the caller to set the certificate_check field of libgit2's git_remote_callbacks structure - if a certificate check callback is not set, libgit2 does not perform any certificate checking. This means that by default - without configuring a certificate check callback, clients will not perform validation on the server SSH keys and may be subject to a man-in-the-middle attack. Users are encouraged to upgrade to v1.4.5 or v1.5.1. Users unable to upgrade should ensure that all relevant certificates are manually checked.
Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV
Affected packages
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2023-22742 libgit2 Fixed in: 1.1.0+dfsg.1-4+deb11u1
- Ubuntu UBUNTU-CVE-2023-22742 libgit2 Fixed in: 0.24.1-2ubuntu0.2+esm2
References
- advisory github.com
- advisory nvd.nist.gov
- advisory github.com
- package crates.io
- package github.com
- patch github.com
- patch github.com
- web rustsec.org
- web github.com
- web github.com
- web openwall.com
- web github.com
- web github.com
- web libssh2.org