CVEvulnerability
CVE-2021-3733
6.5 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2022-03-10
- Last modified
- 2026-10-14
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 6.5 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- CVSS 2.0 ([email protected])
- 4.0 MEDIUM — AV:N/AC:L/Au:S/C:N/I:N/A:P
- Weaknesses
- CWE-400
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.
Affected configurations
• python python (< 3.6.14)
• python python (>= 3.7.0 < 3.7.11)
• python python (>= 3.8.0 < 3.8.10)
• python python (>= 3.9.0 < 3.9.5)
• python python 3.10.0
• 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 8.0
• redhat enterprise linux eus 8.4
• redhat enterprise linux for ibm z systems 8.0
• redhat enterprise linux for ibm z systems eus 8.4
• redhat enterprise linux for power little endian 8.0
• redhat enterprise linux for power little endian eus 8.4
• redhat enterprise linux server aus 8.4
• redhat enterprise linux server for power little endian update services for sap solutions 8.4
• redhat enterprise linux server tus 8.4
• redhat enterprise linux server update services for sap solutions 8.4
• fedoraproject extra packages for enterprise linux 7.0
• fedoraproject fedora 33
• fedoraproject fedora 34
• fedoraproject fedora 35
• fedoraproject fedora 36
• netapp management services for element software and netapp hci
• netapp ontap select deploy administration utility
• netapp solidfire\, enterprise sds \& hci storage node
• netapp hci compute node firmware
Related
Weakness · CWE (1)
- CWE-400 Uncontrolled Resource Consumption weakness
References
- 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://github.com/python/cpython/commit/7215d1ae25525c92b026166f9d5cac85fb 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 lists.debian.org
- https://lists.debian.org/debian-lts-announce/2023/06/msg00039.html lists.debian.org
- https://security.netapp.com/advisory/ntap-20220407-0001/ Third Party Advisory
- https://ubuntu.com/security/CVE-2021-3733 Patch, Third Party 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://github.com/python/cpython/commit/7215d1ae25525c92b026166f9d5cac85fb 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 lists.debian.org
- https://lists.debian.org/debian-lts-announce/2023/06/msg00039.html lists.debian.org
- https://lists.debian.org/debian-lts-announce/2024/12/msg00000.html lists.debian.org
- https://security.netapp.com/advisory/ntap-20220407-0001/ Third Party Advisory
- https://ubuntu.com/security/CVE-2021-3733 Patch, Third Party Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html cert-portal.siemens.com