Closed as not planned
Description
Bug report
Bug description:
During fuzzing of Python standard libraries, the following code snippet causes a ValueError
with the following message: ValueError: embedded null character
. This occurs in the collapse_rfc2231_value
function at line 455 in email/utils.py
.
import email
import sys
import io
d = 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 character
CPython versions tested on:
3.12, 3.11, 3.10, 3.9
Operating systems tested on:
Linux