CVE-2024-56921 Denial of service in n/a
A flaw in Open5gs AMF error handling allows remote attackers to crash the service via specific Registration requests, impacting 5G network availability.
- 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-2024-56921?
CVE-2024-56921 is a high-severity denial of service vulnerability in Open5gs Open5gs, published on 3 Feb 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An issue was discovered in Open5gs v2.7.2. InitialUEMessage, Registration request sent at a specific time can crash AMF due to incorrect error handling of gmm_state_exception() function upon receipt of the Nausf_UEAuthentication_Authenticate response.
Weakness: CWE-400
Which versions are affected by CVE-2024-56921?
It affects 1 product.
Products include Open5gs Open5gs.
How do I fix CVE-2024-56921?
No fix has been published for CVE-2024-56921 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2024-56921 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-56921 exists.
Other vulnerabilities in Open5gs Open5gs
Sources
Also known as GHSA-6wm8-q34j-2mc2.