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Description
Bug report
Bug description:
During fuzzing of Python standard libraries, the following code snippet causes aValueError with the following message:ValueError: embedded null character. This occurs in thecollapse_rfc2231_value function at line 455 inemail/utils.py.
import emailimport sysimport iod = io.StringIO(open(sys.argv[1], "r").read())message_from_fileval1 = email.message_from_file(d)POC File
https://github.com/FuturesLab/POC/blob/main/py-email/poc-03
Exception Trace
Traceback (most recent call last): File "rep.py", line 5, in <module> message_from_fileval1 = email.message_from_file(d) ^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/lib/python3.12/email/__init__.py", line 53, in message_from_file return Parser(*args, **kws).parse(fp) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/lib/python3.12/email/parser.py", line 54, in parse return feedparser.close() ^^^^^^^^^^^^^^^^^^ File "/usr/lib/python3.12/email/feedparser.py", line 185, in close self._call_parse() File "/usr/lib/python3.12/email/feedparser.py", line 178, in _call_parse self._parse() File "/usr/lib/python3.12/email/feedparser.py", line 304, in _parsegen boundary = self._cur.get_boundary() ^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/lib/python3.12/email/message.py", line 865, in get_boundary return utils.collapse_rfc2231_value(boundary).rstrip() ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/lib/python3.12/email/utils.py", line 455, in collapse_rfc2231_value return str(rawbytes, charset, errors) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ValueError: embedded null characterCPython versions tested on:
3.12, 3.11, 3.10, 3.9
Operating systems tested on:
Linux