CVE-2023-27596

Name: CVE-2023-27596
Creator: NVD / NIST
Published: 2023-03-15T21:15:08.953+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.74%

Last modified Jun 17, 2026

CVE-2023-27596 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. OpenSIPS is a Session Initiation Protocol (SIP) server implementation. Prior to versions 3.1.8 and 3.2.5, OpenSIPS crashes when a malformed SDP body is sent multiple times to an OpenSIPS configuration that makes use of the `stream_process` function. EPSS estimates a 0.74% chance of exploitation in the next 30 days.

Description

OpenSIPS is a Session Initiation Protocol (SIP) server implementation. Prior to versions 3.1.8 and 3.2.5, OpenSIPS crashes when a malformed SDP body is sent multiple times to an OpenSIPS configuration that makes use of the `stream_process` function. This issue was discovered during coverage guided fuzzing of the function `codec_delete_except_re`. By abusing this vulnerability, an attacker is able to crash the server. It affects configurations containing functions that rely on the affected code, such as the function `codec_delete_except_re`. This issue has been fixed in version 3.1.8 and 3.2.5.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

0.74%

49.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Opensips	Opensips	< 3.1.8
Opensips	Opensips	>= 3.2.0, < 3.2.5

References

https://github.com/OpenSIPS/opensips/commit/dd051f8ed5ae3347fb1d556ced3c97822c9d8450Patch, Third Party Advisory
https://github.com/OpenSIPS/opensips/security/advisories/GHSA-3ghx-j39m-cw4fThird Party Advisory
https://github.com/OpenSIPS/opensips/commit/dd051f8ed5ae3347fb1d556ced3c97822c9d8450Patch, Third Party Advisory
https://github.com/OpenSIPS/opensips/security/advisories/GHSA-3ghx-j39m-cw4fThird Party Advisory

Timeline

Published: Mar 15, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-27596?

How severe is CVE-2023-27596?

CVE-2023-27596 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.74% probability of exploitation in the next 30 days.

How do I fix CVE-2023-27596?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-27596?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST