CVE-2020-4071 – Timing attack on django-basic-auth-ip-whitelist

https://notcve.org/view.php?id=CVE-2020-4071

In django-basic-auth-ip-whitelist before 0.3.4, a potential timing attack exists on websites where the basic authentication is used or configured, i.e. BASIC_AUTH_LOGIN and BASIC_AUTH_PASSWORD is set. Currently the string comparison between configured credentials and the ones provided by users is performed through a character-by-character string comparison. This enables a possibility that attacker may time the time it takes the server to validate different usernames and password, and use this knowledge to work out the valid credentials. This attack is understood not to be realistic over the Internet. • https://github.com/tm-kn/django-basic-auth-ip-whitelist/security/advisories/GHSA-m38j-pmg3-v5x5 https://groups.google.com/forum/#%21msg/django-developers/iAaq0pvHXuA/fpUuwjK3i2wJ • CWE-208: Observable Timing Discrepancy •