NVD

CVE-2021-3733 Detail

Modified

This vulnerability has been modified since it was last analyzed by the NVD. It is awaiting reanalysis which may result in further changes to the information provided.

Description

There's a flaw in urllib's AbstractBasicAuthHandler class. An attacker who controls a malicious HTTP server that an HTTP client (such as web browser) connects to, could trigger a Regular Expression Denial of Service (ReDOS) during an authentication request with a specially crafted payload that is sent by the server to the client. The greatest threat that this flaw poses is to application availability.

Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.

CVSS 4.0 Severity and Vector Strings:

NIST: NVD

N/A

NVD assessment not yet provided.

CVSS 3.x Severity and Vector Strings:

NIST: NVD

Base Score: 6.5 MEDIUM

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS 2.0 Severity and Vector Strings:

National Institute of Standards and Technology

NIST: NVD

Base Score: 4.0 MEDIUM

Vector: (AV:N/AC:L/Au:S/C:N/I:N/A:P)

References to Advisories, Solutions, and Tools

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Hyperlink	Resource
https://bugs.python.org/issue43075	Exploit Issue Tracking Patch Vendor Advisory
https://bugs.python.org/issue43075	Exploit Issue Tracking Patch Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1995234	Issue Tracking Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1995234	Issue Tracking Third Party Advisory
https://github.com/python/cpython/commit/7215d1ae25525c92b026166f9d5cac85fb	Patch Third Party Advisory
https://github.com/python/cpython/commit/7215d1ae25525c92b026166f9d5cac85fb	Patch Third Party Advisory
https://github.com/python/cpython/pull/24391	Patch Third Party Advisory
https://github.com/python/cpython/pull/24391	Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/05/msg00024.html
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/2023/06/msg00039.html
https://security.netapp.com/advisory/ntap-20220407-0001/	Third Party Advisory
https://security.netapp.com/advisory/ntap-20220407-0001/	Third Party Advisory
https://ubuntu.com/security/CVE-2021-3733	Patch Third Party Advisory
https://ubuntu.com/security/CVE-2021-3733	Patch Third Party Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-400	Uncontrolled Resource Consumption	NIST Red Hat, Inc.

Known Affected Software Configurations Switch to CPE 2.2

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Denotes Vulnerable Software
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Change History

9 change records found show changes

CVE Modified by CVE 11/21/2024 1:22:16 AM

Action	Type	New Value
Added	Reference	https://bugs.python.org/issue43075
Added	Reference	https://bugzilla.redhat.com/show_bug.cgi?id=1995234
Added	Reference	https://github.com/python/cpython/commit/7215d1ae25525c92b026166f9d5cac85fb
Added	Reference	https://github.com/python/cpython/pull/24391
Added	Reference	https://lists.debian.org/debian-lts-announce/2023/05/msg00024.html
Added	Reference	https://lists.debian.org/debian-lts-announce/2023/06/msg00039.html
Added	Reference	https://security.netapp.com/advisory/ntap-20220407-0001/
Added	Reference	https://ubuntu.com/security/CVE-2021-3733

Modified Analysis by NIST 6/01/2022 4:30:48 PM

Action	Type	Old Value	New Value
Changed	CPE Configuration	OR cpe:2.3:a:python:python:3.6.0:-::::::* cpe:2.3:a:python:python:3.7.0:-::::::* cpe:2.3:a:python:python:3.8.0:-::::::* cpe:2.3:a:python:python:3.9.0:-::::::* cpe:2.3:a:python:python:3.10.0:-::::::*	OR cpe:2.3:a:python:python::::::::* versions up to (excluding) 3.6.14 cpe:2.3:a:python:python::::::::* versions from (including) 3.7.0 up to (excluding) 3.7.11 cpe:2.3:a:python:python::::::::* versions from (including) 3.8.0 up to (excluding) 3.8.10 cpe:2.3:a:python:python::::::::* versions from (including) 3.9.0 up to (excluding) 3.9.5 cpe:2.3:a:python:python:3.10.0:-::::::*
Changed	CPE Configuration	OR cpe:2.3:o:redhat:enterprise_linux:8.0:::::::	Record truncated, showing 500 of 1042 characters. View Entire Change Record OR cpe:2.3:a:redhat:codeready_linux_builder:8.0::::::: cpe:2.3:a:redhat:codeready_linux_builder_for_ibm_z_server:8.0::::::: cpe:2.3:a:redhat:codeready_linux_builder_for_power_little_endian:8.0::::::: cpe:2.3:o:redhat:enterprise_linux:8.0::::::: cpe:2.3:o:redhat:enterprise_linux_eus:8.4::::::: cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:8.0::::::: *cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_eus:8.4
Added	CPE Configuration		OR cpe:2.3:a:fedoraproject:fedora_extra_packages_for_enterprise_linux:7.0::::::: cpe:2.3:o:fedoraproject:fedora:33::::::: cpe:2.3:o:fedoraproject:fedora:34::::::: cpe:2.3:o:fedoraproject:fedora:35::::::: cpe:2.3:o:fedoraproject:fedora:36:::::::
Added	CPE Configuration		OR cpe:2.3:a:netapp:management_services_for_element_software_and_netapp_hci:-::::::: cpe:2.3:a:netapp:ontap_select_deploy_administration_utility:-::::::: cpe:2.3:a:netapp:solidfire\,_enterprise_sds_\&_hci_storage_node:-::::::: cpe:2.3:o:netapp:hci_compute_node_firmware:-:::::::
Changed	Reference Type	https://security.netapp.com/advisory/ntap-20220407-0001/ No Types Assigned	https://security.netapp.com/advisory/ntap-20220407-0001/ Third Party Advisory
Changed	Reference Type	https://ubuntu.com/security/CVE-2021-3733 Third Party Advisory	https://ubuntu.com/security/CVE-2021-3733 Patch, Third Party Advisory

Initial Analysis by NIST 3/14/2022 7:55:44 PM

Action	Type	Old Value	New Value
Added	CVSS V3.1		NIST AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Added	CVSS V2		NIST (AV:N/AC:L/Au:S/C:N/I:N/A:P)
Added	CWE		NIST CWE-400
Added	CPE Configuration		OR cpe:2.3:a:python:python:3.6.0:-::::::* cpe:2.3:a:python:python:3.7.0:-::::::* cpe:2.3:a:python:python:3.8.0:-::::::* cpe:2.3:a:python:python:3.9.0:-::::::* cpe:2.3:a:python:python:3.10.0:-::::::*
Added	CPE Configuration		OR cpe:2.3:o:redhat:enterprise_linux:8.0:::::::
Changed	Reference Type	https://bugs.python.org/issue43075 No Types Assigned	https://bugs.python.org/issue43075 Exploit, Issue Tracking, Patch, Vendor Advisory
Changed	Reference Type	https://bugzilla.redhat.com/show_bug.cgi?id=1995234 No Types Assigned	https://bugzilla.redhat.com/show_bug.cgi?id=1995234 Issue Tracking, Third Party Advisory
Changed	Reference Type	https://github.com/python/cpython/commit/7215d1ae25525c92b026166f9d5cac85fb No Types Assigned	https://github.com/python/cpython/commit/7215d1ae25525c92b026166f9d5cac85fb Patch, Third Party Advisory
Changed	Reference Type	https://github.com/python/cpython/pull/24391 No Types Assigned	https://github.com/python/cpython/pull/24391 Patch, Third Party Advisory
Changed	Reference Type	https://ubuntu.com/security/CVE-2021-3733 No Types Assigned	https://ubuntu.com/security/CVE-2021-3733 Third Party Advisory

Quick Info

CVE Dictionary Entry:
CVE-2021-3733
NVD Published Date:
03/10/2022
NVD Last Modified:
11/21/2024
Source:
Red Hat, Inc.

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Information Technology Laboratory

National Vulnerability Database

National Vulnerability Database

CVE-2021-3733 Detail

Description

Metrics

References to Advisories, Solutions, and Tools

Weakness Enumeration

Known Affected Software Configurations Switch to CPE 2.2

CPEs loading, please wait.

Change History

CVE Modified by CVE 11/21/2024 1:22:16 AM

CVE Modified by Red Hat, Inc. 5/14/2024 5:25:07 AM

CVE Modified by Red Hat, Inc. 6/30/2023 7:15:09 PM

CVE Modified by Red Hat, Inc. 5/24/2023 5:15:10 PM

Reanalysis by NIST 10/26/2022 9:35:24 AM

CPE Deprecation Remap by NIST 6/14/2022 10:38:23 AM

Modified Analysis by NIST 6/01/2022 4:30:48 PM

CVE Modified by Red Hat, Inc. 4/07/2022 8:15:08 PM

Initial Analysis by NIST 3/14/2022 7:55:44 PM

Quick Info