CVE-2021-3737
At a glance Severity HIGH 7.5 EPSS EPSS 13.17 % · percentile 96 (2026-10-27) State PUBLISHED Published 2022-03-04 Updated 2026-10-14 Assigner redhat NVD status Modified Description A flaw was found in python. An improperly handled HTTP response in the HTTP client code of python may allow a remote attacker, who controls the HTTP server, to make the client script enter an infinite loop, consuming CPU time. The highest threat from this vulnerability is to system availability.
Scores Version Score Vector Scored by CVSS 3.1 HIGH 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CISA-ADP CVSS 3.1 HIGH 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H NVD · nvd@nist.gov (Primary) CVSS 3.1 HIGH 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H NVD · 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary) CVSS 2.0 HIGH 7.1 AV:N/AC:M/Au:N/C:N/I:N/A:C NVD · nvd@nist.gov (Primary)
Weaknesses (CWE)
European references
CERT-FR advisories
Affected configurations (NVD CPE) cpe:2.3:a:python:python:*:*:*:*:*:*:*:* ≥ 3.6.0 < 3.6.14cpe:2.3:a:python:python:*:*:*:*:*:*:*:* ≥ 3.7.0 < 3.7.11cpe:2.3:a:python:python:*:*:*:*:*:*:*:* ≥ 3.8.0 < 3.8.11cpe:2.3:a:python:python:*:*:*:*:*:*:*:* ≥ 3.9.0 < 3.9.6cpe:2.3:a:redhat:codeready_linux_builder:8.0:*:*:*:*:*:*:*cpe:2.3:a:redhat:codeready_linux_builder_for_ibm_z_systems:8.0:*:*:*:*:*:*:*cpe:2.3:a:redhat:codeready_linux_builder_for_power_little_endian:8.0:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:8.0:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:8.0:*:*:*:*:*:*:*cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*cpe:2.3:o:canonical:ubuntu_linux:21.04:*:*:*:*:*:*:*cpe:2.3:a:netapp:hci:-:*:*:*:*:*:*:*cpe:2.3:a:netapp:management_services_for_element_software:-:*:*:*:*:*:*:*cpe:2.3:a:netapp:netapp_xcp_smb:-:*:*:*:*:*:*:*cpe:2.3:a:netapp:ontap_select_deploy_administration_utility:-:*:*:*:*:*:*:*cpe:2.3:a:netapp:xcp_nfs:-:*:*:*:*:*:*:*cpe:2.3:a:oracle:communications_cloud_native_core_binding_support_function:22.1.3:*:*:*:*:*:*:*cpe:2.3:a:oracle:communications_cloud_native_core_network_exposure_function:22.1.1:*:*:*:*:*:*:*cpe:2.3:a:oracle:communications_cloud_native_core_policy:22.2.0:*:*:*:*:*:*:*Affected products Product Versions python affected Fixed in python v3.6.14, python v3.7.11, python v3.8.11, python v3.9.6, python v3.10.0b2
References
Sources
