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
Link | Resource |
---|---|
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 | |
https://lists.debian.org/debian-lts-announce/2023/06/msg00039.html | |
https://security.netapp.com/advisory/ntap-20220407-0001/ | Third Party Advisory |
https://ubuntu.com/security/CVE-2021-3733 | Patch Third Party Advisory |
History
No history.
MITRE Information
Status: PUBLISHED
Assigner: redhat
Published: 2022-03-07T00:00:00
Updated: 2023-06-30T00:00:00
Reserved: 2021-08-23T00:00:00
Link: CVE-2021-3733
JSON object: View
NVD Information
Status : Modified
Published: 2022-03-10T17:42:59.623
Modified: 2023-06-30T23:15:09.690
Link: CVE-2021-3733
JSON object: View
Redhat Information
No data.
CWE