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.
References (9)
Core 9
Core References
Mailing List mailing-list
https://lists.debian.org/debian-lts-announce/2023/05/msg00024.html
Mailing List mailing-list
https://lists.debian.org/debian-lts-announce/2023/06/msg00039.html
Exploit, Issue Tracking, Patch, Vendor Advisory
https://bugs.python.org/issue43075
Issue Tracking, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1995234
Patch, Third Party Advisory
https://github.com/python/cpython/commit/7215d1ae25525c92b026166f9d5cac85fb
Patch, Third Party Advisory
https://github.com/python/cpython/pull/24391
Third Party Advisory
https://security.netapp.com/advisory/ntap-20220407-0001/
Patch, Third Party Advisory
https://ubuntu.com/security/CVE-2021-3733
Scores
CVSS v3
6.5
EPSS
0.0063
EPSS Percentile
70.3%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details
CWE
CWE-400
Status
published
Products (24)
fedoraproject/extra_packages_for_enterprise_linux
7.0
fedoraproject/fedora
33
fedoraproject/fedora
34
fedoraproject/fedora
35
fedoraproject/fedora
36
netapp/hci_compute_node_firmware
netapp/management_services_for_element_software_and_netapp_hci
netapp/ontap_select_deploy_administration_utility
netapp/solidfire\,_enterprise_sds_\&_hci_storage_node
python/python
3.10.0
... and 14 more
Published
Mar 10, 2022
Tracked Since
Feb 18, 2026