CVE-2021-3737

CVSS V2 High 7.1 CVSS V3 High 7.5
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.
Overview
  • CVE ID
  • CVE-2021-3737
  • Assigner
  • secalert@redhat.com
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2022-03-04T19:15:08
  • Last Modified Date
  • 2023-02-02T17:07:26
Weakness Enumerations
CWE URL
CWE-400 http://cwe.mitre.org/data/definitions/400.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:a:python:python:*:*:*:*:*:*:*:* 1 OR 3.6.0 3.6.14
cpe:2.3:a:python:python:*:*:*:*:*:*:*:* 1 OR 3.7.0 3.7.11
cpe:2.3:a:python:python:*:*:*:*:*:*:*:* 1 OR 3.8.0 3.8.11
cpe:2.3:a:python:python:*:*:*:*:*:*:*:* 1 OR 3.9.0 3.9.6
cpe:2.3:a:redhat:codeready_linux_builder:8.0:*:*:*:*:*:*:* 1 OR
cpe:2.3:a:redhat:codeready_linux_builder_for_ibm_z_systems:8.0:*:*:*:*:*:*:* 1 OR
cpe:2.3:a:redhat:codeready_linux_builder_for_power_little_endian:8.0:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:8.0:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:8.0:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:* 1 OR
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:* 1 OR
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* 1 OR
cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:* 1 OR
cpe:2.3:o:canonical:ubuntu_linux:21.04:*:*:*:*:*:*:* 1 OR
cpe:2.3:a:netapp:hci:-:*:*:*:*:*:*:* 1 OR
cpe:2.3:a:netapp:management_services_for_element_software:-:*:*:*:*:*:*:* 1 OR
cpe:2.3:a:netapp:netapp_xcp_smb:-:*:*:*:*:*:*:* 1 OR
cpe:2.3:a:netapp:ontap_select_deploy_administration_utility:-:*:*:*:*:*:*:* 1 OR
cpe:2.3:a:netapp:xcp_nfs:-:*:*:*:*:*:*:* 1 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:M/Au:N/C:N/I:N/A:C
  • Access Vector
  • NETWORK
  • Access Compatibility
  • MEDIUM
  • Authentication
  • NONE
  • Confidentiality Impact
  • NONE
  • Integrity Impact
  • NONE
  • Availability Impact
  • COMPLETE
  • Base Score
  • 7.1
  • Severity
  • HIGH
  • Exploitability Score
  • 8.6
  • Impact Score
  • 6.9
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • NONE
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • NONE
  • Availability Impact
  • HIGH
  • Base Score
  • 7.5
  • Base Severity
  • HIGH
  • Exploitability Score
  • 3.9
  • Impact Score
  • 3.6
References
Reference URL Reference Tags
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://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
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2021-3737
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3737
History
Created Old Value New Value Data Type Notes
2022-05-10 06:29:10 Added to TrackCVE
2022-12-06 11:21:53 2022-03-04T19:15Z 2022-03-04T19:15:08 CVE Published Date updated
2022-12-06 11:21:53 2022-07-25T18:16:29 CVE Modified Date updated
2022-12-06 11:21:53 Modified Vulnerability Status updated
2022-12-06 11:21:59 References updated
2022-12-30 15:13:11 Modified Undergoing Analysis Vulnerability Status updated
2023-02-02 17:12:58 2023-02-02T17:07:26 CVE Modified Date updated
2023-02-02 17:12:58 Undergoing Analysis Analyzed Vulnerability Status updated