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CVE-2021-3177

9.8 critical SSVC exploitation: poc Modified
NVD · CVE.org

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.

Fix

Patch, vendor advisory and mitigation references on NVD 14

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 1

  1. First seenCVSS 9.8 · python, fedoraproject, netappNVD modified 2026-10-14 10:17

Affected (CPE criteria) 12

  • cpe:2.3:a:python:python:*:*:*:*:*:*:*:*
  • cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
  • cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
  • cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:*
  • cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:windows:*:*
  • cpe:2.3:a:netapp:ontap_select_deploy_administration_utility:-:*:*:*:*:*:*:*
  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
  • cpe:2.3:a:oracle:communications_cloud_native_core_network_function_cloud_native_environment:22.2.0:*:*:*:*:*:*:*
  • cpe:2.3:a:oracle:communications_offline_mediation_controller:12.0.0.3.0:*:*:*:*:*:*:*
  • cpe:2.3:a:oracle:communications_pricing_design_center:12.0.0.3.0:*:*:*:*:*:*:*
  • cpe:2.3:a:oracle:enterprise_manager_ops_center:12.4.0.0:*:*:*:*:*:*:*
  • cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:*:*:*:*:*:*:*

References 57