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.
History

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cve-icon 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

cve-icon 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

cve-icon Redhat Information

No data.

CWE