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[3.13] gh-125660: Reject invalid unicode escapes for Python implementation of JSON decoder (GH-125683) (GH-125694)

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(cherry picked from commit df751363e3)

Co-authored-by: Nice Zombies <nineteendo19d0@gmail.com>
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Miss Islington (bot) 2024-10-21 15:07:56 +02:00 • committed by GitHub
parent 6715afe349
commit d9dafc790d
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3 changed files with 16 additions and 4 deletions
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9
Lib/json/decoder.py
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@ -50,17 +50,18 @@ _CONSTANTS = {
}
HEXDIGITS = re.compile(r'[0-9A-Fa-f]{4}', FLAGS)
STRINGCHUNK = re.compile(r'(.*?)(["\\\x00-\x1f])', FLAGS)
BACKSLASH = {
'"': '"', '\\': '\\', '/': '/',
'b': '\b', 'f': '\f', 'n': '\n', 'r': '\r', 't': '\t',
}
def _decode_uXXXX(s, pos):
esc = s[pos + 1:pos + 5]
if len(esc) == 4 and esc[1] not in 'xX':
def _decode_uXXXX(s, pos, _m=HEXDIGITS.match):
esc = _m(s, pos + 1)
if esc is not None:
try:
return int(esc, 16)
return int(esc.group(), 16)
except ValueError:
pass
msg = "Invalid \\uXXXX escape"