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Commit94e0fb0

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Add a unit test forCVE-2023-40590
This adds test_it_executes_git_not_from_cwd to verify that theexecute method does not use "git.exe" in the current directory onWindows, nor "git" in the current directory on Unix-like systems,when those files are executable.It adds a _chdir helper context manager to support this, becausecontextlib.chdir is only available on Python 3.11 and later.
1 parent6029211 commit94e0fb0

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‎test/test_git.py‎

Lines changed: 31 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -4,10 +4,12 @@
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#
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# This module is part of GitPython and is released under
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# the BSD License: http://www.opensource.org/licenses/bsd-license.php
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importcontextlib
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importos
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importshutil
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importsubprocess
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importsys
10-
fromtempfileimportTemporaryFile
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fromtempfileimportTemporaryDirectory,TemporaryFile
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fromunittestimportmock
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fromgitimportGit,refresh,GitCommandError,GitCommandNotFound,Repo,cmd
@@ -20,6 +22,17 @@
2022
fromgit.compatimportis_win
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2224

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@contextlib.contextmanager
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def_chdir(new_dir):
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"""Context manager to temporarily change directory. Not reentrant."""
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old_dir=os.getcwd()
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os.chdir(new_dir)
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try:
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yield
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finally:
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os.chdir(old_dir)
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classTestGit(TestBase):
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@classmethod
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defsetUpClass(cls):
@@ -75,6 +88,23 @@ def test_it_transforms_kwargs_into_git_command_arguments(self):
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deftest_it_executes_git_to_shell_and_returns_result(self):
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self.assertRegex(self.git.execute(["git","version"]),r"^git version [\d\.]{2}.*$")
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deftest_it_executes_git_not_from_cwd(self):
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withTemporaryDirectory()astmpdir:
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ifis_win:
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# Copy an actual binary executable that is not git.
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other_exe_path=os.path.join(os.getenv("WINDIR"),"system32","hostname.exe")
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impostor_path=os.path.join(tmpdir,"git.exe")
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shutil.copy(other_exe_path,impostor_path)
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else:
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# Create a shell script that doesn't do anything.
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impostor_path=os.path.join(tmpdir,"git")
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withopen(impostor_path,mode="w",encoding="utf-8")asfile:
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print("#!/bin/sh",file=file)
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os.chmod(impostor_path,0o755)
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with_chdir(tmpdir):
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self.assertRegex(self.git.execute(["git","version"]),r"^git version [\d\.]{2}.*$")
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deftest_it_accepts_stdin(self):
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filename=fixture_path("cat_file_blob")
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withopen(filename,"r")asfh:

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