CVE-2021-28122 Missing authorization in n/a

Critical 9.8 Published 10 Mar 2021 Updated 3 Aug 2024

Unauthenticated attackers can modify subscriber data and create admin users in Open5GS WebUI due to missing 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-2021-28122?

CVE-2021-28122 is a critical missing authorization vulnerability in Open5gs Open5gs, published on 10 Mar 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A request-validation issue was discovered in Open5GS 2.1.3 through 2.2.x before 2.2.1. The WebUI component allows an unauthenticated user to use a crafted HTTP API request to create, read, update, or delete entries in the subscriber database. For example, new administrative users can be added. The issue occurs because Express is not set up to require authentication.

Weakness: CWE-306

Which versions are affected by CVE-2021-28122?

It affects 1 product.

Products include Open5gs Open5gs.

How do I fix CVE-2021-28122?

No fix has been published for CVE-2021-28122 yet. Limit exposure of the affected software until one is available.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2021-28122 being exploited?

There is no known exploitation of CVE-2021-28122 in the wild and no public exploit code.

All Open5gs Open5gs vulnerabilities

Sources

Also known as GHSA-66wx-wcfh-hv4g.