CVE-2021-3737
- Source
- https://cve.org/CVERecord?id=CVE-2021-3737
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-3737.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2021-3737
- Aliases
- Downstream
BELL (1)
CLSA (12)
MGASA (1)
OESA (1)
openSUSE (6)
SUSE (8)
- Related
- Published
- 2022-03-04T19:15:08Z
- Modified
- 2026-08-07T11:31:01Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
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.
- Database specific
{ "unresolved_ranges": [ { "cpes": [ "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:*:*:*:*:*:*:*" ], "extracted_events": [ { "introduced": "14.04" }, { "last_affected": "14.04" }, { "introduced": "16.04" }, { "last_affected": "16.04" }, { "introduced": "18.04" }, { "last_affected": "18.04" }, { "introduced": "20.04" }, { "last_affected": "20.04" }, { "introduced": "21.04" }, { "last_affected": "21.04" } ], "source": "CPE_STRING", "vendor_product": "canonical:ubuntu_linux" }, { "cpes": [ "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*", "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*" ], "extracted_events": [ { "introduced": "33" }, { "last_affected": "33" }, { "introduced": "34" }, { "last_affected": "34" } ], "source": "CPE_STRING", "vendor_product": "fedoraproject:fedora" }, { "cpes": [ "cpe:2.3:a:oracle:communications_cloud_native_core_binding_support_function:22.1.3:*:*:*:*:*:*:*" ], "extracted_events": [ { "introduced": "22.1.3" }, { "last_affected": "22.1.3" } ], "source": "CPE_STRING", "vendor_product": "oracle:communications_cloud_native_core_binding_support_function" }, { "cpes": [ "cpe:2.3:a:oracle:communications_cloud_native_core_network_exposure_function:22.1.1:*:*:*:*:*:*:*" ], "extracted_events": [ { "introduced": "22.1.1" }, { "last_affected": "22.1.1" } ], "source": "CPE_STRING", "vendor_product": "oracle:communications_cloud_native_core_network_exposure_function" }, { "cpes": [ "cpe:2.3:a:oracle:communications_cloud_native_core_policy:22.2.0:*:*:*:*:*:*:*" ], "extracted_events": [ { "introduced": "22.2.0" }, { "last_affected": "22.2.0" } ], "source": "CPE_STRING", "vendor_product": "oracle:communications_cloud_native_core_policy" }, { "cpes": [ "cpe:2.3:a:redhat:codeready_linux_builder:8.0:*:*:*:*:*:*:*" ], "extracted_events": [ { "introduced": "8.0" }, { "last_affected": "8.0" } ], "source": "CPE_STRING", "vendor_product": "redhat:codeready_linux_builder" }, { "cpes": [ "cpe:2.3:a:redhat:codeready_linux_builder_for_ibm_z_systems:8.0:*:*:*:*:*:*:*" ], "extracted_events": [ { "introduced": "8.0" }, { "last_affected": "8.0" } ], "source": "CPE_STRING", "vendor_product": "redhat:codeready_linux_builder_for_ibm_z_systems" }, { "cpes": [ "cpe:2.3:a:redhat:codeready_linux_builder_for_power_little_endian:8.0:*:*:*:*:*:*:*" ], "extracted_events": [ { "introduced": "8.0" }, { "last_affected": "8.0" } ], "source": "CPE_STRING", "vendor_product": "redhat:codeready_linux_builder_for_power_little_endian" }, { "cpes": [ "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:*:*:*:*:*:*:*" ], "extracted_events": [ { "introduced": "6.0" }, { "last_affected": "6.0" }, { "introduced": "7.0" }, { "last_affected": "7.0" }, { "introduced": "8.0" }, { "last_affected": "8.0" } ], "source": "CPE_STRING", "vendor_product": "redhat:enterprise_linux" }, { "cpes": [ "cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:8.0:*:*:*:*:*:*:*" ], "extracted_events": [ { "introduced": "8.0" }, { "last_affected": "8.0" } ], "source": "CPE_STRING", "vendor_product": "redhat:enterprise_linux_for_ibm_z_systems" }, { "cpes": [ "cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:8.0:*:*:*:*:*:*:*" ], "extracted_events": [ { "introduced": "8.0" }, { "last_affected": "8.0" } ], "source": "CPE_STRING", "vendor_product": "redhat:enterprise_linux_for_power_little_endian" } ] }- References
-
- https://lists.debian.org/debian-lts-announce/2023/05/msg00024.html
- https://lists.debian.org/debian-lts-announce/2023/06/msg00039.html
- https://lists.debian.org/debian-lts-announce/2024/11/msg00024.html
- https://lists.debian.org/debian-lts-announce/2024/12/msg00000.html
- https://security.netapp.com/advisory/ntap-20220407-0009/
- https://bugs.python.org/issue44022
- https://bugzilla.redhat.com/show_bug.cgi?id=1995162
- https://github.com/python/cpython/pull/25916
- https://github.com/python/cpython/pull/26503
- https://python-security.readthedocs.io/vuln/urllib-100-continue-loop.html
- https://ubuntu.com/security/CVE-2021-3737
- https://www.oracle.com/security-alerts/cpujul2022.html
Affected packages
Git / github.com/python/cpython
Affected ranges
- Type
- GIT
- Repo
- https://github.com/python/cpython
- Events
-
IntroducedFixedIntroducedFixedIntroducedFixedIntroducedFixed
- Database specific
-
Show details
{ "cpe": "cpe:2.3:a:python:python:*:*:*:*:*:*:*:*", "extracted_events": [ { "introduced": "3.6.0" }, { "fixed": "3.6.14" }, { "introduced": "3.7.0" }, { "fixed": "3.7.11" }, { "introduced": "3.8.0" }, { "fixed": "3.8.11" }, { "introduced": "3.9.0" }, { "fixed": "3.9.6" } ], "source": "CPE_RANGE" }