Is CVE-2023-38703 actively exploited?

No active exploitation of CVE-2023-38703 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2023-38703 be exploited remotely?

Yes. CVE-2023-38703 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2023-38703?

CVE-2023-38703 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2023-38703

CWE-416Published: October 6, 2023· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official 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.

NVD Source

Risk Analysis

PJSIP is susceptible to a use-after-free vulnerability when using SRTP with non-UDP transports. This can lead to application crashes or remote code execution, posing a critical risk.

No public exploit is known, and it is not listed in the CISA KEV.

Recommended Action

Apply the patch provided in the PJSIP master branch to resolve the transport synchronization issue.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2023-38703 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

From a weakness classification perspective (CWE-416): Use-after-free vulnerabilities involve accessing memory after it has been freed, often enabling arbitrary code execution.