{"id":"BIT-python-min-2021-3733","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.","aliases":["BIT-libpython-2021-3733","BIT-python-2021-3733","CVE-2021-3733","PSF-2022-6"],"modified":"2025-11-06T13:25:46.476Z","published":"2025-01-16T07:23:04.404Z","database_specific":{"severity":"Medium","cpes":["cpe:2.3:a:python:python:*:*:*:*:*:*:*:*","cpe:2.3:a:python:python:3.10.0:-:*:*:*:*:*:*"]},"references":[{"type":"WEB","url":"https://bugs.python.org/issue43075"},{"type":"WEB","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1995234"},{"type":"WEB","url":"https://github.com/python/cpython/commit/7215d1ae25525c92b026166f9d5cac85fb"},{"type":"WEB","url":"https://github.com/python/cpython/pull/24391"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2023/05/msg00024.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2023/06/msg00039.html"},{"type":"WEB","url":"https://security.netapp.com/advisory/ntap-20220407-0001/"},{"type":"WEB","url":"https://ubuntu.com/security/CVE-2021-3733"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-3733"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2024/12/msg00000.html"}],"affected":[{"package":{"name":"python-min","ecosystem":"Bitnami","purl":"pkg:bitnami/python-min"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"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"},{"introduced":"3.10.0"},{"fixed":"3.10.1"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/python-min/BIT-python-min-2021-3733.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}],"schema_version":"1.7.3"}