CVEvulnerability
CVE-2021-3737
7.5 HIGH
Official page ↗
- Status
- Modified
- Published
- 2022-03-04
- Last modified
- 2026-10-14
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CVSS 2.0 ([email protected])
- 7.1 HIGH — AV:N/AC:M/Au:N/C:N/I:N/A:C
- Weaknesses
- CWE-400, CWE-835
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.
Affected configurations
• python python (>= 3.6.0 < 3.6.14)
• python python (>= 3.7.0 < 3.7.11)
• python python (>= 3.8.0 < 3.8.11)
• python python (>= 3.9.0 < 3.9.6)
• redhat codeready linux builder 8.0
• redhat codeready linux builder for ibm z systems 8.0
• redhat codeready linux builder for power little endian 8.0
• redhat enterprise linux 6.0
• redhat enterprise linux 7.0
• redhat enterprise linux 8.0
• redhat enterprise linux for ibm z systems 8.0
• redhat enterprise linux for power little endian 8.0
• fedoraproject fedora 33
• fedoraproject fedora 34
• canonical ubuntu linux 14.04
• canonical ubuntu linux 16.04
• canonical ubuntu linux 18.04
• canonical ubuntu linux 20.04
• canonical ubuntu linux 21.04
• netapp hci
• netapp management services for element software
• netapp netapp xcp smb
• netapp ontap select deploy administration utility
• netapp xcp nfs
• oracle communications cloud native core binding support function 22.1.3
• oracle communications cloud native core network exposure function 22.1.1
• oracle communications cloud native core policy 22.2.0
Related
References
- https://bugs.python.org/issue44022 Exploit, Issue Tracking, Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1995162 Issue Tracking, Patch, Third Party Advisory
- https://github.com/python/cpython/pull/25916 Patch, Third Party Advisory
- https://github.com/python/cpython/pull/26503 Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/05/msg00024.html lists.debian.org
- https://lists.debian.org/debian-lts-announce/2023/06/msg00039.html lists.debian.org
- https://python-security.readthedocs.io/vuln/urllib-100-continue-loop.html Patch, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20220407-0009/ Third Party Advisory
- https://ubuntu.com/security/CVE-2021-3737 Patch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpujul2022.html Patch, Third Party Advisory
- https://bugs.python.org/issue44022 Exploit, Issue Tracking, Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1995162 Issue Tracking, Patch, Third Party Advisory
- https://github.com/python/cpython/pull/25916 Patch, Third Party Advisory
- https://github.com/python/cpython/pull/26503 Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/05/msg00024.html lists.debian.org
- https://lists.debian.org/debian-lts-announce/2023/06/msg00039.html lists.debian.org
- https://lists.debian.org/debian-lts-announce/2024/11/msg00024.html lists.debian.org
- https://lists.debian.org/debian-lts-announce/2024/12/msg00000.html lists.debian.org
- https://python-security.readthedocs.io/vuln/urllib-100-continue-loop.html Patch, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20220407-0009/ Third Party Advisory
- https://ubuntu.com/security/CVE-2021-3737 Patch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpujul2022.html Patch, Third Party Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html cert-portal.siemens.com