CVE-2023-23846 Denial of service in Open5GS

High 7.5 Published 1 Feb 2023 Updated 27 Mar 2025

Attackers can cause denial of service in Open5GS GTP library by sending crafted GTPv1-U messages with zero-length extension headers, leading to infinite loops.

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-2023-23846?

CVE-2023-23846 is a high-severity denial of service vulnerability in Open5gs Open5gs, published on 1 Feb 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Due to insufficient length validation in the Open5GS GTP library versions prior to versions 2.4.13 and 2.5.7, when parsing extension headers in GPRS tunneling protocol (GPTv1-U) messages, a protocol payload with any extension header length set to zero causes an infinite loop. The affected process becomes immediately unresponsive, resulting in denial of service and excessive resource consumption. CVSS3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C

Weakness: CWE-770

Which versions are affected by CVE-2023-23846?

It affects 1 product.

Products include Open5gs Open5gs.

How do I fix CVE-2023-23846?

No fix has been published for CVE-2023-23846 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-2023-23846 being exploited?

There is no known exploitation of CVE-2023-23846 in the wild and no public exploit code.

All Open5gs Open5gs vulnerabilities

Sources

Also known as GHSA-3vj7-j945-rq57.