Out-of-bounds write in Windows asyncio.ProacterEventLoop.sock_recvfrom_into() when using nbytes
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.8epss 0.4%
exploitation probability
0.4%top 67% of all CVEs
observed exploitation
nono source reports it
The method "sock_recvfrom_into()" of "asyncio.ProacterEventLoop" (Windows only) was missing a boundary check for the data buffer when using nbytes parameter. This allowed for an out-of-bounds buffer write if data was larger than the buffer size. Non-Windows platforms are not affected.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N
Affected products
Python Software Foundation · CPythonReferences
https://github.com/python/cpython/commit/1274766d3c29007ab77245a72abbf8dce2a9db4dhttps://github.com/python/cpython/commit/27522b7d6e6588f03e61099dd858cd5a9314e2f2https://github.com/python/cpython/commit/6c8b85b3f1d83d5697ec19880960e1eacee56688https://github.com/python/cpython/commit/95633d2aad4721e25e4dfd9f43dfb6e1edcbd741https://github.com/python/cpython/commit/f5ca38739241fe7a40a4b116d5a8a1364dd6fea7https://github.com/python/cpython/issues/148808https://github.com/python/cpython/pull/148809https://mail.python.org/archives/list/security-announce@python.org/thread/KWTPIQBOOOUNQP7UFSLBI437NJDFLA3F/