CVE-2023-28099

Name: CVE-2023-28099
Creator: NVD / NIST
Published: 2023-03-15T23:15:09.807+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.91%

Last modified Jun 17, 2026

CVE-2023-28099 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 3.1.9 and 3.2.6, if `ds_is_in_list()` is used with an invalid IP address string (`NULL` is illegal input), OpenSIPS will attempt to print a string from a random address (stack garbage), which could lead to a crash. EPSS estimates a 0.91% chance of exploitation in the next 30 days.

Description

OpenSIPS is a Session Initiation Protocol (SIP) server implementation. Prior to versions 3.1.9 and 3.2.6, if `ds_is_in_list()` is used with an invalid IP address string (`NULL` is illegal input), OpenSIPS will attempt to print a string from a random address (stack garbage), which could lead to a crash. All users of `ds_is_in_list()` without the `$si` variable as 1st parameter could be affected by this vulnerability to a larger, lesser or no extent at all, depending if the data passed to the function is a valid IPv4 or IPv6 address string or not. Fixes will are available starting with the 3.1.9 and 3.2.6 minor releases. There are no known workarounds.

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

0.91%

55.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Opensips	Opensips	< 3.1.9
Opensips	Opensips	>= 3.2.0, < 3.2.6

References

https://github.com/OpenSIPS/opensips/commit/e2f13d374Patch, Third Party Advisory
https://github.com/OpenSIPS/opensips/issues/2780Third Party Advisory
https://github.com/OpenSIPS/opensips/security/advisories/GHSA-pfm5-6vhv-3ff3Third Party Advisory
https://github.com/OpenSIPS/opensips/commit/e2f13d374Patch, Third Party Advisory
https://github.com/OpenSIPS/opensips/issues/2780Third Party Advisory
https://github.com/OpenSIPS/opensips/security/advisories/GHSA-pfm5-6vhv-3ff3Third Party Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2023-28099?

How severe is CVE-2023-28099?

CVE-2023-28099 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.91% probability of exploitation in the next 30 days.

How do I fix CVE-2023-28099?

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-2023-28099?

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

Scan your code now

Source: NVD / NIST