Impact
On Windows, if git-sizer is run against a non-bare repository, and that repository has an executable called git.exe, git.bat, etc., then that executable might be run by git-sizer rather than the system git executable. An attacker could try to use social engineering to get a victim to run git-sizer against a hostile repository and thereby get the victim to run arbitrary code.
On Linux or other Unix-derived platforms, a similar problem could occur if the user's PATH has the current directory before the path to the standard git executable, but this is would be a very unusual configuration that has been known for decades to lead to all kinds of security problems.
Patches
Users should update to git-sizer v1.4.0
Workarounds
If you are on Windows, then either
- Don't run
git-sizer against a repository that might contain hostile code, or, if you must…
- Run
git-sizer against a bare clone of the hostile repository, or, if that is not possible…
- Make sure that the hostile repository doesn't have an executable in its top-level directory before running
git-sizer.
If you are on Linux or other Unix-based system, then (for myriad reasons!) don't add the current directory to your PATH.
References
For more information
If you have any questions or comments about this advisory:
Impact
On Windows, if
git-sizeris run against a non-bare repository, and that repository has an executable calledgit.exe,git.bat, etc., then that executable might be run bygit-sizerrather than the systemgitexecutable. An attacker could try to use social engineering to get a victim to rungit-sizeragainst a hostile repository and thereby get the victim to run arbitrary code.On Linux or other Unix-derived platforms, a similar problem could occur if the user's
PATHhas the current directory before the path to the standardgitexecutable, but this is would be a very unusual configuration that has been known for decades to lead to all kinds of security problems.Patches
Users should update to git-sizer v1.4.0
Workarounds
If you are on Windows, then either
git-sizeragainst a repository that might contain hostile code, or, if you must…git-sizeragainst a bare clone of the hostile repository, or, if that is not possible…git-sizer.If you are on Linux or other Unix-based system, then (for myriad reasons!) don't add the current directory to your
PATH.References
For more information
If you have any questions or comments about this advisory:
git-sizerproject.