[New-bugs-announce] [issue42946] email: ValueError in get_section when parsing header with non-ASCII digit

[Florian Bruhin]

New submission from Florian Bruhin <python.org at the-compiler.org>:

Found mostly by accident:

>>> import email.headerregistry
>>> reg = email.headerregistry.HeaderRegistry()
>>> h = reg('Content-Disposition', 'inline; 0*²')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python3.10/email/headerregistry.py", line 608, in __call__
    return self[name](name, value)
  File "/usr/lib/python3.10/email/headerregistry.py", line 196, in __new__
    cls.parse(value, kwds)
  File "/usr/lib/python3.10/email/headerregistry.py", line 452, in parse
    kwds['parse_tree'] = parse_tree = cls.value_parser(value)
  File "/usr/lib/python3.10/email/_header_value_parser.py", line 2705, in parse_content_disposition_header
    disp_header.append(parse_mime_parameters(value[1:]))
  File "/usr/lib/python3.10/email/_header_value_parser.py", line 2569, in parse_mime_parameters
    token, value = get_parameter(value)
  File "/usr/lib/python3.10/email/_header_value_parser.py", line 2431, in get_parameter
    token, value = get_section(value)
  File "/usr/lib/python3.10/email/_header_value_parser.py", line 2384, in get_section
    section.number = int(digits)
ValueError: invalid literal for int() with base 10: '²'

This probably happens because:

>>> '²'.isdigit()
True
>>> int('²')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: invalid literal for int() with base 10: '²'

----------
components: Library (Lib)
messages: 385162
nosy: The Compiler, barry, maxking, r.david.murray
priority: normal
severity: normal
status: open
title: email: ValueError in get_section when parsing header with non-ASCII digit
type: behavior
versions: Python 3.10, Python 3.6, Python 3.7, Python 3.8, Python 3.9

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue42946>
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