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GoogleOSV:PSF-2021-3HistoryJan 19, 2021 - 12:00 a.m.
ctypes: Buffer overflow in PyCArg_repr
2021-01-1900:00:00
Google
osv.dev
12
python
buffer overflow
pycarg_repr
remote code execution
floating-point numbers
sprintf unsafely
software
Python 3.x through 3.9.1 has a buffer overflow in PyCArg_repr in _ctypes/callproc.c, which may lead to remote code execution in certain Python applications that accept floating-point numbers as untrusted input, as demonstrated by a 1e300 argument to c_double.from_param. This occurs because sprintf is used unsafely.
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