# CVE-2023-38703: asterisk: PJSIP is a free and open source multimedia communication library written in C with high level API in C, C++, Java, C#...

CVE-2023-38703 is fixed in asterisk on 1 platform by DEBIAN-CVE-2023-38703 (version 1:20.8.1~dfsg+~cs6.14.40431414-1), released October 6, 2023. It is not reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/cve/CVE-2023-38703
- Priority: Urgent
- CVSS: 9.8 (critical)
- EPSS: 0.0159
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 6, 2023

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | asterisk Debian 14 | 1:20.8.1~dfsg+~cs6.14.40431414-1 | [DEBIAN-CVE-2023-38703](https://patchblox.com/security/data/fix/linux/debian-cve-2023-38703.md) | Oct 6, 2023 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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