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CVE-2021-3177

9.8 CRITICAL

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 P...

Published: 2021-01-19 · Last updated: 2026-06-17

Severity and scoring

CVSS
9.8 CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-120

Affected products

VendorProduct
debianactive_iq_unified_manager, communications_cloud_native_core_network_function_cloud_native_environment, communications_offline_mediation_controller
fedoraprojectactive_iq_unified_manager, communications_cloud_native_core_network_function_cloud_native_environment, communications_offline_mediation_controller
netappactive_iq_unified_manager, communications_cloud_native_core_network_function_cloud_native_environment, communications_offline_mediation_controller
oracleactive_iq_unified_manager, communications_cloud_native_core_network_function_cloud_native_environment, communications_offline_mediation_controller
pythonactive_iq_unified_manager, communications_cloud_native_core_network_function_cloud_native_environment, communications_offline_mediation_controller

Description

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.

Source: NVD

References

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