Python CVE-2021-3733 Denial of Service Vulnerability

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 Applications

Python

CVE References

Other References