New submission from bpoaugust <sebbaz+...@gmail.com>:
The Message-ID parser can crash on truncated input.
For example:
import email.policy
message=email.message_from_string("Message-id: <A@",
policy=email.policy.default)
message['Message-id']
results in:
Traceback (most recent call last):
File
"/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/email/_header_value_parser.py",
line 2095, in get_msg_id
token, value = get_dot_atom_text(value)
File
"/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/email/_header_value_parser.py",
line 1334, in get_dot_atom_text
raise errors.HeaderParseError("expected atom at a start of "
email.errors.HeaderParseError: expected atom at a start of dot-atom-text but
found ''
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File
"/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/email/_header_value_parser.py",
line 2098, in get_msg_id
token, value = get_no_fold_literal(value)
File
"/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/email/_header_value_parser.py",
line 2035, in get_no_fold_literal
raise errors.HeaderParseError(
email.errors.HeaderParseError: expected no-fold-literal but found ''
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/private/var/sebb/git/pmfoal/local/testm1.py", line 23, in <module>
message['Message-id']
File
"/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/email/message.py",
line 391, in __getitem__
return self.get(name)
File
"/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/email/message.py",
line 471, in get
return self.policy.header_fetch_parse(k, v)
File
"/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/email/policy.py",
line 163, in header_fetch_parse
return self.header_factory(name, value)
File
"/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/email/headerregistry.py",
line 604, in __call__
return self[name](name, value)
File
"/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/email/headerregistry.py",
line 192, in __new__
cls.parse(value, kwds)
File
"/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/email/headerregistry.py",
line 532, in parse
kwds['parse_tree'] = parse_tree = cls.value_parser(value)
File
"/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/email/_header_value_parser.py",
line 2126, in parse_message_id
token, value = get_msg_id(value)
File
"/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/email/_header_value_parser.py",
line 2101, in get_msg_id
token, value = get_domain(value)
File
"/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/email/_header_value_parser.py",
line 1604, in get_domain
if value[0] in CFWS_LEADER:
IndexError: string index out of range
----------
components: email
messages: 410972
nosy: barry, bpoaugust, r.david.murray
priority: normal
severity: normal
status: open
title: MessageID parser can crash with IndexError: string index out of range
type: crash
_______________________________________
Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue46435>
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