CVE-2021-3733
- Source
- https://cve.org/CVERecord?id=CVE-2021-3733
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-3733.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2021-3733
- Aliases
- Downstream
- Related
- Published
- 2022-03-10T17:42:59.623Z
- Modified
- 2026-05-06T04:19:41.444565Z
- Severity
-
- 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
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.
- Database specific
{ "unresolved_ranges": [ { "source": "CPE_FIELD", "cpe": "cpe:2.3:a:fedoraproject:extra_packages_for_enterprise_linux:7.0:*:*:*:*:*:*:*", "extracted_events": [ { "last_affected": "7.0" } ] }, { "source": "CPE_FIELD", "cpe": "cpe:2.3:a:python:python:*:*:*:*:*:*:*:*", "extracted_events": [ { "fixed": "3.6.14" }, { "introduced": "3.7.0" }, { "fixed": "3.7.11" }, { "introduced": "3.8.0" }, { "fixed": "3.8.10" }, { "introduced": "3.9.0" }, { "fixed": "3.9.5" } ] }, { "source": "CPE_FIELD", "cpe": "cpe:2.3:a:python:python:3.10.0:-:*:*:*:*:*:*", "extracted_events": [ { "last_affected": "3.10.0-NA" } ] }, { "source": "CPE_FIELD", "cpe": "cpe:2.3:a:redhat:codeready_linux_builder:8.0:*:*:*:*:*:*:*", "extracted_events": [ { "last_affected": "8.0" } ] }, { "source": "CPE_FIELD", "cpe": "cpe:2.3:a:redhat:codeready_linux_builder_for_ibm_z_systems:8.0:*:*:*:*:*:*:*", "extracted_events": [ { "last_affected": "8.0" } ] }, { "source": "CPE_FIELD", "cpe": "cpe:2.3:a:redhat:codeready_linux_builder_for_power_little_endian:8.0:*:*:*:*:*:*:*", "extracted_events": [ { "last_affected": "8.0" } ] }, { "source": "CPE_FIELD", "cpe": "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*", "extracted_events": [ { "last_affected": "33" } ] }, { "source": "CPE_FIELD", "cpe": "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*", "extracted_events": [ { "last_affected": "34" } ] }, { "source": "CPE_FIELD", "cpe": "cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*", "extracted_events": [ { "last_affected": "35" } ] }, { "source": "CPE_FIELD", "cpe": "cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*", "extracted_events": [ { "last_affected": "36" } ] }, { "source": "CPE_FIELD", "cpe": "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*", "extracted_events": [ { "last_affected": "8.0" } ] }, { "source": "CPE_FIELD", "cpe": "cpe:2.3:o:redhat:enterprise_linux_eus:8.4:*:*:*:*:*:*:*", "extracted_events": [ { "last_affected": "8.4" } ] }, { "source": "CPE_FIELD", "cpe": "cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:8.0:*:*:*:*:*:*:*", "extracted_events": [ { "last_affected": "8.0" } ] }, { "source": "CPE_FIELD", "cpe": "cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_eus:8.4:*:*:*:*:*:*:*", "extracted_events": [ { "last_affected": "8.4" } ] }, { "source": "CPE_FIELD", "cpe": "cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:8.0:*:*:*:*:*:*:*", "extracted_events": [ { "last_affected": "8.0" } ] }, { "source": "CPE_FIELD", "cpe": "cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:8.4:*:*:*:*:*:*:*", "extracted_events": [ { "last_affected": "8.4" } ] }, { "source": "CPE_FIELD", "cpe": "cpe:2.3:o:redhat:enterprise_linux_server_aus:8.4:*:*:*:*:*:*:*", "extracted_events": [ { "last_affected": "8.4" } ] }, { "source": "CPE_FIELD", "cpe": "cpe:2.3:o:redhat:enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions:8.4:*:*:*:*:*:*:*", "extracted_events": [ { "last_affected": "8.4" } ] }, { "source": "CPE_FIELD", "cpe": "cpe:2.3:o:redhat:enterprise_linux_server_tus:8.4:*:*:*:*:*:*:*", "extracted_events": [ { "last_affected": "8.4" } ] }, { "source": "CPE_FIELD", "cpe": "cpe:2.3:o:redhat:enterprise_linux_server_update_services_for_sap_solutions:8.4:*:*:*:*:*:*:*", "extracted_events": [ { "last_affected": "8.4" } ] } ] }- References
-
- 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/2024/12/msg00000.html
- https://security.netapp.com/advisory/ntap-20220407-0001/
- https://bugzilla.redhat.com/show_bug.cgi?id=1995234
- https://bugs.python.org/issue43075
- https://github.com/python/cpython/commit/7215d1ae25525c92b026166f9d5cac85fb
- https://github.com/python/cpython/pull/24391
- https://ubuntu.com/security/CVE-2021-3733