CVE-2020-24660 Lack of URL normalization may lead to authorization bypass when URL access rules are used
Attackers can bypass URL-based access controls on protected virtual hosts by submitting non-normalized URIs when using NGINX.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-24660?
CVE-2020-24660 is a critical authentication bypass vulnerability in Debian Debian Linux, published on 14 Sep 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An issue was discovered in LemonLDAP::NG through 2.0.8, when NGINX is used. An attacker may bypass URL-based access control to protected Virtual Hosts by submitting a non-normalized URI. This also affects versions before 0.5.2 of the "Lemonldap::NG handler for Node.js" package.
Weakness: CWE-425
Which versions are affected by CVE-2020-24660?
2 open source packages ship an affected version, including lemonldap-ng-handler. It affects 2 products.
| Package | Affected | Fixed in |
|---|---|---|
lemonldap-ng-handler npm | All versions | 0.5.2 |
lemonldap-ng-handler npm | All versions | 0.5.2 |
Products include Debian Debian Linux, Lemonldap-Ng Lemonldap\.
How do I fix CVE-2020-24660?
Upgrade lemonldap-ng-handler to 0.5.2 or later.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2020-24660 being exploited?
There is no known exploitation of CVE-2020-24660 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as DEBIAN-CVE-2020-24660, DLA-2367-1, DSA-4762-1, GHSA-x44x-r84w-8v67, UBUNTU-CVE-2020-24660.