CVE-2023-28095 OpenSIPS has vulnerability in the building the local negative replies

High 7.5 Published 15 Mar 2023 Updated 25 Feb 2025

A potential crash in OpenSIPS SIP server message translation could lead to denial of service, though exploitation is currently unconfirmed.

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-2023-28095?

CVE-2023-28095 is a high-severity denial of service 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. Versions prior to 3.1.7 and 3.2.4 have a potential issue in `msg_translator.c:2628` which might lead to a server crash. This issue was found while fuzzing the function `build_res_buf_from_sip_req` but could not be reproduced against a running instance of OpenSIPS. This issue could not be exploited against a running instance of OpenSIPS since no public function was found to make use of this vulnerable code. Even in the case of exploitation through unknown vectors, it is highly unlikely that this issue would lead to anything other than Denial of Service. This issue has been fixed in versions 3.1.7 and 3.2.4.

Weakness: CWE-20

Which versions are affected by CVE-2023-28095?

It affects 1 product.

Products include Opensips Opensips.

How do I fix CVE-2023-28095?

No fix has been published for CVE-2023-28095 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-2023-28095 being exploited?

There is no known exploitation of CVE-2023-28095 in the wild and no public exploit code.

Sources

Also known as GHSA-7pf3-24qg-8v9h, UBUNTU-CVE-2023-28095.