CVE-2021-3733

MEDIUM

6.5

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.

Details CVE

Score CVSS v3.16.5

SeveriteMEDIUM

Vecteur CVSSCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Vecteur d'attaqueNETWORK

ComplexiteLOW

Privileges requisLOW

Interaction utilisateurNONE

Publie3/10/2022

Derniere modification11/3/2025

Sourcenvd

Observations honeypot0

Produits affectes

fedoraproject:extra_packages_for_enterprise_linuxfedoraproject:fedoranetapp:hci_compute_node_firmwarenetapp:management_services_for_element_software_and_netapp_hcinetapp:ontap_select_deploy_administration_utilitynetapp:solidfire\,_enterprise_sds_\&_hci_storage_nodepython:pythonredhat:codeready_linux_builderredhat:codeready_linux_builder_for_ibm_z_systemsredhat:codeready_linux_builder_for_power_little_endianredhat:enterprise_linuxredhat:enterprise_linux_eusredhat:enterprise_linux_for_ibm_z_systemsredhat:enterprise_linux_for_ibm_z_systems_eusredhat:enterprise_linux_for_power_little_endianredhat:enterprise_linux_for_power_little_endian_eusredhat:enterprise_linux_server_ausredhat:enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutionsredhat:enterprise_linux_server_tusredhat:enterprise_linux_server_update_services_for_sap_solutions

Faiblesses (CWE)

CWE-400CWE-400

References

https://bugs.python.org/issue43075(secalert@redhat.com)

https://bugzilla.redhat.com/show_bug.cgi?id=1995234(secalert@redhat.com)

https://github.com/python/cpython/commit/7215d1ae25525c92b026166f9d5cac85fb(secalert@redhat.com)

https://github.com/python/cpython/pull/24391(secalert@redhat.com)

https://lists.debian.org/debian-lts-announce/2023/05/msg00024.html(secalert@redhat.com)

https://lists.debian.org/debian-lts-announce/2023/06/msg00039.html(secalert@redhat.com)

https://security.netapp.com/advisory/ntap-20220407-0001/(secalert@redhat.com)

https://ubuntu.com/security/CVE-2021-3733(secalert@redhat.com)

https://bugs.python.org/issue43075(af854a3a-2127-422b-91ae-364da2661108)

https://bugzilla.redhat.com/show_bug.cgi?id=1995234(af854a3a-2127-422b-91ae-364da2661108)

https://github.com/python/cpython/commit/7215d1ae25525c92b026166f9d5cac85fb(af854a3a-2127-422b-91ae-364da2661108)

https://github.com/python/cpython/pull/24391(af854a3a-2127-422b-91ae-364da2661108)

https://lists.debian.org/debian-lts-announce/2023/05/msg00024.html(af854a3a-2127-422b-91ae-364da2661108)

https://lists.debian.org/debian-lts-announce/2023/06/msg00039.html(af854a3a-2127-422b-91ae-364da2661108)

https://lists.debian.org/debian-lts-announce/2024/12/msg00000.html(af854a3a-2127-422b-91ae-364da2661108)

https://security.netapp.com/advisory/ntap-20220407-0001/(af854a3a-2127-422b-91ae-364da2661108)

https://ubuntu.com/security/CVE-2021-3733(af854a3a-2127-422b-91ae-364da2661108)

Correlations IOC

Aucune correlation enregistree

This product uses data from the NVD API but is not endorsed or certified by the NVD.