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22 lines
725 B
Python
22 lines
725 B
Python
"""File I/O — negative fixture.
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Safe function: validates path stays within allowed directory.
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Expected verdict: NotConfirmed.
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"""
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import os
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def read_file(path):
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"""Safe: resolves and validates path is within /tmp/safe-uploads/."""
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base_dir = "/tmp/safe-uploads"
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os.makedirs(base_dir, exist_ok=True)
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# Resolve to absolute path and check it stays within base_dir.
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abs_path = os.path.realpath(os.path.join(base_dir, path))
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if not abs_path.startswith(base_dir + os.sep) and abs_path != base_dir:
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print("Access denied: path traversal detected")
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return
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try:
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with open(abs_path) as f:
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print(f.read())
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except FileNotFoundError:
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print("File not found")
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