CVE-2023-28097 OpenSIPS has vulnerability in the Content-Length Parser

High 7.5 Published 15 Mar 2023 Updated 25 Feb 2025

A malformed SIP message with a large Content-Length value causes a segmentation fault in OpenSIPS, leading to denial of service.

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-2023-28097?

CVE-2023-28097 is a high-severity vulnerability in opensips, published on 15 Mar 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

OpenSIPS is a Session Initiation Protocol (SIP) server implementation. Prior to versions 3.1.9 and 3.2.6, a malformed SIP message containing a large _Content-Length_ value and a specially crafted Request-URI causes a segmentation fault in OpenSIPS. This issue occurs when a large amount of shared memory using the `-m` flag was allocated to OpenSIPS, such as 10 GB of RAM. On the test system, this issue occurred when shared memory was set to `2362` or higher. This issue is fixed in versions 3.1.9 and 3.2.6. The only workaround is to guarantee that the Content-Length value of input messages is never larger than `2147483647`.

Weakness: CWE-190

Which versions are affected by CVE-2023-28097?

It affects 1 product.

Products include Opensips Opensips.

How do I fix CVE-2023-28097?

No fix has been published for CVE-2023-28097 yet. Limit exposure of the affected software until one is available.

Is CVE-2023-28097 being exploited?

There is no known exploitation of CVE-2023-28097 in the wild and no public exploit code.

Sources

Also known as GHSA-c6j5-f4h4-2xrq, UBUNTU-CVE-2023-28097.