Vulnerability Description
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. However, it may be achieved from within local networks where the website is hosted, e.g. from inside a data centre where a website's server is located. Sites protected by IP address whitelisting only are unaffected by this vulnerability. This vulnerability has been fixed on version 0.3.4 of django-basic-auth-ip-whitelist. Update to version 0.3.4 as soon as possible and change basic authentication username and password configured on a Django project using this package. A workaround without upgrading to version 0.3.4 is to stop using basic authentication and use the IP whitelisting component only. It can be achieved by not setting BASIC_AUTH_LOGIN and BASIC_AUTH_PASSWORD in Django project settings.
CVSS Score
LOW
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Django-Basic-Auth-Ip-Whitelist Project | Django-Basic-Auth-Ip-Whitelist | < 0.3.4 |
Related Weaknesses (CWE)
References
- https://github.com/tm-kn/django-basic-auth-ip-whitelist/security/advisories/GHSAThird Party Advisory
- https://groups.google.com/forum/#%21msg/django-developers/iAaq0pvHXuA/fpUuwjK3i2
- https://github.com/tm-kn/django-basic-auth-ip-whitelist/security/advisories/GHSAThird Party Advisory
- https://groups.google.com/forum/#%21msg/django-developers/iAaq0pvHXuA/fpUuwjK3i2
FAQ
What is CVE-2020-4071?
CVE-2020-4071 is a vulnerability with a CVSS score of 2.2 (LOW). 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....
How severe is CVE-2020-4071?
CVE-2020-4071 has been rated LOW with a CVSS base score of 2.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-4071?
Check the references section above for vendor advisories and patch information. Affected products include: Django-Basic-Auth-Ip-Whitelist Project Django-Basic-Auth-Ip-Whitelist.