CVE-2023-38703

Name: CVE-2023-38703
Creator: NVD / NIST
Published: 2023-10-06T14:15:12.02+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.28%

Last modified Jun 17, 2026

CVE-2023-38703 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. PJSIP is a free and open source multimedia communication library written in C with high level API in C, C++, Java, C#, and Python languages. SRTP is a higher level media transport which is stacked upon a lower level media transport such as UDP and ICE. EPSS estimates a 1.28% chance of exploitation in the next 30 days.

Description

PJSIP is a free and open source multimedia communication library written in C with high level API in C, C++, Java, C#, and Python languages. SRTP is a higher level media transport which is stacked upon a lower level media transport such as UDP and ICE. Currently a higher level transport is not synchronized with its lower level transport that may introduce use-after-free issue. This vulnerability affects applications that have SRTP capability (`PJMEDIA_HAS_SRTP` is set) and use underlying media transport other than UDP. This vulnerability’s impact may range from unexpected application termination to control flow hijack/memory corruption. The patch is available as a commit in the master branch.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

1.28%

66.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Teluu	Pjsip	<= 2.13.1

References

https://github.com/pjsip/pjproject/commit/6dc9b8c181aff39845f02b4626e0812820d4ef0dPatch
https://github.com/pjsip/pjproject/security/advisories/GHSA-f76w-fh7c-pc66Patch, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2023/12/msg00019.htmlMailing List
https://github.com/pjsip/pjproject/commit/6dc9b8c181aff39845f02b4626e0812820d4ef0dPatch
https://github.com/pjsip/pjproject/security/advisories/GHSA-f76w-fh7c-pc66Patch, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2023/12/msg00019.htmlMailing List

Timeline

Published: Oct 6, 2023
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2023-38703?

How severe is CVE-2023-38703?

CVE-2023-38703 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.28% probability of exploitation in the next 30 days.

How do I fix CVE-2023-38703?

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-2023-38703?

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

Scan your code now

Source: NVD / NIST