Cloning local Git repository by untrusted user allows the untrusted user to modify objects in the cloned repository at will

Git is a revision control system. Prior to versions 2.45.1, 2.44.1, 2.43.4, 2.42.2, 2.41.1, 2.40.2, and 2.39.4, local clones may end up hardlinking files into the target repository's object database when source and target repository reside on the same disk. If the source repository is owned by a different user, then those hardlinked files may be rewritten at any point in time by the untrusted user. Cloning local repositories will cause Git to either copy or hardlink files of the source repository into the target repository. This significantly speeds up such local clones compared to doing a "proper" clone and saves both disk space and compute time. When cloning a repository located on the same disk that is owned by a different user than the current user we also end up creating such hardlinks. These files will continue to be owned and controlled by the potentially-untrusted user and can be rewritten by them at will in the future. The problem has been patched in versions 2.45.1, 2.44.1, 2.43.4, 2.42.2, 2.41.1, 2.40.2, and 2.39.4.

CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:N/I:L/A:L

权限预留不恰当

Git 安全漏洞

Git是一套免费、开源的分布式版本控制系统。 Git存在安全漏洞，该漏洞源于本地克隆最终可能会将文件硬链接到目标存储库的对象数据库中。

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