user/sven/git.git, branch v2.32.3

Git 2.32.3

2022-06-23T10:35:32Z

Signed-off-by: Johannes Schindelin

Sync with 2.31.4

2022-06-23T10:35:30Z

* maint-2.31: Git 2.31.4 Git 2.30.5 setup: tighten ownership checks post CVE-2022-24765 git-compat-util: allow root to access both SUDO_UID and root owned t0034: add negative tests and allow git init to mostly work under sudo git-compat-util: avoid failing dir ownership checks if running privileged t: regression git needs safe.directory when using sudo

Git 2.31.4

2022-06-23T10:35:25Z

Signed-off-by: Johannes Schindelin

Sync with 2.30.5

2022-06-23T10:35:23Z

* maint-2.30: Git 2.30.5 setup: tighten ownership checks post CVE-2022-24765 git-compat-util: allow root to access both SUDO_UID and root owned t0034: add negative tests and allow git init to mostly work under sudo git-compat-util: avoid failing dir ownership checks if running privileged t: regression git needs safe.directory when using sudo

Git 2.30.5

2022-06-23T10:31:05Z

Signed-off-by: Johannes Schindelin

setup: tighten ownership checks post CVE-2022-24765

2022-06-23T10:31:05Z

8959555cee7 (setup_git_directory(): add an owner check for the top-level directory, 2022-03-02), adds a function to check for ownership of repositories using a directory that is representative of it, and ways to add exempt a specific repository from said check if needed, but that check didn't account for owership of the gitdir, or (when used) the gitfile that points to that gitdir. An attacker could create a git repository in a directory that they can write into but that is owned by the victim to work around the fix that was introduced with CVE-2022-24765 to potentially run code as the victim. An example that could result in privilege escalation to root in *NIX would be to set a repository in a shared tmp directory by doing (for example): $ git -C /tmp init To avoid that, extend the ensure_valid_ownership function to be able to check for all three paths. This will have the side effect of tripling the number of stat() calls when a repository is detected, but the effect is expected to be likely minimal, as it is done only once during the directory walk in which Git looks for a repository. Additionally make sure to resolve the gitfile (if one was used) to find the relevant gitdir for checking. While at it change the message printed on failure so it is clear we are referring to the repository by its worktree (or gitdir if it is bare) and not to a specific directory. Helped-by: Junio C Hamano Helped-by: Johannes Schindelin Signed-off-by: Carlo Marcelo Arenas Belón

Merge branch 'cb/path-owner-check-with-sudo'

2022-06-23T10:31:04Z

With a recent update to refuse access to repositories of other people by default, "sudo make install" and "sudo git describe" stopped working. This series intends to loosen it while keeping the safety. * cb/path-owner-check-with-sudo: t0034: add negative tests and allow git init to mostly work under sudo git-compat-util: avoid failing dir ownership checks if running privileged t: regression git needs safe.directory when using sudo Signed-off-by: Johannes Schindelin

git-compat-util: allow root to access both SUDO_UID and root owned

2022-06-17T21:03:08Z

Previous changes introduced a regression which will prevent root for accessing repositories owned by thyself if using sudo because SUDO_UID takes precedence. Loosen that restriction by allowing root to access repositories owned by both uid by default and without having to add a safe.directory exception. A previous workaround that was documented in the tests is no longer needed so it has been removed together with its specially crafted prerequisite. Helped-by: Johanness Schindelin Signed-off-by: Carlo Marcelo Arenas Belón Signed-off-by: Junio C Hamano

t0034: add negative tests and allow git init to mostly work under sudo

2022-05-13T01:12:23Z

Add a support library that provides one function that can be used to run a "scriplet" of commands through sudo and that helps invoking sudo in the slightly awkward way that is required to ensure it doesn't block the call (if shell was allowed as tested in the prerequisite) and it doesn't run the command through a different shell than the one we intended. Add additional negative tests as suggested by Junio and that use a new workspace that is owned by root. Document a regression that was introduced by previous commits where root won't be able anymore to access directories they own unless SUDO_UID is removed from their environment. The tests document additional ways that this new restriction could be worked around and the documentation explains why it might be instead considered a feature, but a "fix" is planned for a future change. Helped-by: Junio C Hamano Helped-by: Phillip Wood Signed-off-by: Carlo Marcelo Arenas Belón Signed-off-by: Junio C Hamano

git-compat-util: avoid failing dir ownership checks if running privileged

2022-05-13T01:12:23Z

bdc77d1d685 (Add a function to determine whether a path is owned by the current user, 2022-03-02) checks for the effective uid of the running process using geteuid() but didn't account for cases where that user was root (because git was invoked through sudo or a compatible tool) and the original uid that repository trusted for its config was no longer known, therefore failing the following otherwise safe call: guy@renard ~/Software/uncrustify $ sudo git describe --always --dirty [sudo] password for guy: fatal: unsafe repository ('/home/guy/Software/uncrustify' is owned by someone else) Attempt to detect those cases by using the environment variables that those tools create to keep track of the original user id, and do the ownership check using that instead. This assumes the environment the user is running on after going privileged can't be tampered with, and also adds code to restrict that the new behavior only applies if running as root, therefore keeping the most common case, which runs unprivileged, from changing, but because of that, it will miss cases where sudo (or an equivalent) was used to change to another unprivileged user or where the equivalent tool used to raise privileges didn't track the original id in a sudo compatible way. Because of compatibility with sudo, the code assumes that uid_t is an unsigned integer type (which is not required by the standard) but is used that way in their codebase to generate SUDO_UID. In systems where uid_t is signed, sudo might be also patched to NOT be unsigned and that might be able to trigger an edge case and a bug (as described in the code), but it is considered unlikely to happen and even if it does, the code would just mostly fail safely, so there was no attempt either to detect it or prevent it by the code, which is something that might change in the future, based on expected user feedback. Reported-by: Guy Maurel Helped-by: SZEDER Gábor Helped-by: Randall Becker Helped-by: Phillip Wood Suggested-by: Johannes Schindelin Signed-off-by: Carlo Marcelo Arenas Belón Signed-off-by: Junio C Hamano