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Fix code scanning alert no. 4: Arbitrary file write during tarfile extraction #496

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Fix code scanning alert no. 4: Arbitrary file write during tarfile extraction #496

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3 changes: 3 additions & 0 deletions dpdispatcher/contexts/ssh_context.py
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Original file line number Diff line number Diff line change
Expand Up @@ -972,6 +972,9 @@ def _get_files(self, files, tar_compress=True):
self.ssh_session.get(from_f, to_f)
# extract
with tarfile.open(to_f, mode=tarfile_mode) as tar:
for member in tar.getmembers():
if os.path.isabs(member.name) or ".." in member.name:
raise ValueError(f"Illegal tar archive entry: {member.name}")
tar.extractall(path=self.local_root)
# cleanup
os.remove(to_f)
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