Description: | Git for Windows is a fork of Git containing Windows-specific patches.
This vulnerability affects users working on multi-user machines, where
untrusted parties have write access to the same hard disk. Those
untrusted parties could create the folder `C:\.git`, which would be
picked up by Git operations run supposedly outside a repository while
searching for a Git directory. Git would then respect any config in
said Git directory. Git Bash users who set `GIT_PS1_SHOWDIRTYSTATE`
are vulnerable as well. Users who installed posh-gitare vulnerable
simply by starting a PowerShell. Users of IDEs such as Visual Studio
are vulnerable: simply creating a new project would already read and
respect the config specified in `C:\.git\config`. Users of the
Microsoft fork of Git are vulnerable simply by starting a Git Bash.
The problem has been patched in Git for Windows v2.35.2. Users unable
to upgrade may create the folder `.git` on all drives where Git
commands are run, and remove read/write access from those folders as a
workaround. Alternatively, define or extend `GIT_CEILING_DIRECTORIES`
to cover the _parent_ directory of the user profile, e.g. `C:\Users`
if the user profile is located in `C:\Users\my-user-name`.
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