New submission from Koh <kohyouli...@gmail.com>:
By specifying a filename in the compile function and then improperly
terminating it, we are able to return the first line of any file.
>> compile('yield', '/etc/passwd', 'exec')
File "/etc/passwd", line 1
root:x:0:0:root:/root:/bin/bash
^
SyntaxError: 'yield' outside function
Is this intended behavior? I have been able to use it to escape sandboxes.
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messages: 357906
nosy: iso
priority: normal
severity: normal
status: open
title: `compile` returns the first line of file on termination
type: security
versions: Python 2.7, Python 3.5, Python 3.6, Python 3.7, Python 3.8, Python 3.9
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue38985>
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