CVE-2021-21399 Unauthenticated SubSonic backend access in Ampache

Critical 9.1 Published 13 Apr 2021 Updated 3 Aug 2024

Unauthenticated attackers can access the SubSonic backend in Ampache by using a non-existent username, bypassing authentication checks.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2021-21399?

CVE-2021-21399 is a critical authentication bypass vulnerability in ampache, published on 13 Apr 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Ampache is a web based audio/video streaming application and file manager. Versions prior to 4.4.1 allow unauthenticated access to Ampache using the subsonic API. To successfully make the attack you must use a username that is not part of the site to bypass the auth checks. For more details and workaround guidance see the referenced GitHub security advisory.

Weakness: CWE-287, CWE-284

Which versions are affected by CVE-2021-21399?

It affects 1 product.

Products include Ampache Ampache.

How do I fix CVE-2021-21399?

No fix has been published for CVE-2021-21399 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2021-21399 being exploited?

There is no known exploitation of CVE-2021-21399 in the wild and no public exploit code.

Sources

Also known as GHSA-p9pm-j95j-5mjf, UBUNTU-CVE-2021-21399.