CVE-2020-5236

Waitress version 1.4.2 allows a DOS attack When waitress receives a header that contains invalid characters. When a header like "Bad-header: xxxxxxxxxxxxxxx\x10" is received, it will cause the regular expression engine to catastrophically backtrack causing the process to use 100% CPU time and...

CVE-2020-5236

CVE-2020-5236 affects the Python WSGI server waitress. A flaw in the regex used to validate incoming HTTP headers allows catastrophic backtracking when headers contain invalid characters (e.g., Bad-header: xxxxxxxxxxxxxxx\x10), causing the server to hit 100% CPU and deny service. The issue was in...