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CVE-2023-38703— PJSIP has use-after-free vulnerability in SRTP media transport

Quick assessment

Affected
pjsip pjproject
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

PJSIP是一个免费和开源的多媒体通信库，用C语言编写，实现基于标准的协议，如SIP, SDP, RTP, STUN, TURN，和ICE。 PJSIP 2.14之前版本存在资源管理错误漏洞，该漏洞源于较高级别的传输与其较低级别的传输不同步，这可能会引入释放后重用问题。

CVSS 9.8 · Critical EPSS 1.28% · P67

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2023-38703

Vulnerability Information
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Vulnerability Title
PJSIP has use-after-free vulnerability in SRTP media transport
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
释放后使用
Source: CVE Program / CVE List V5
Vulnerability Title
PJSIP 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
PJSIP是一个免费和开源的多媒体通信库，用C语言编写，实现基于标准的协议，如SIP, SDP, RTP, STUN, TURN，和ICE。 PJSIP 2.14之前版本存在资源管理错误漏洞，该漏洞源于较高级别的传输与其较低级别的传输不同步，这可能会引入释放后重用问题。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
pjsip pjproject <= 2.13.1 -

II. Public POCs for CVE-2023-38703

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 10793 chars
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III. Intelligence Information for CVE-2023-38703

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Patches & Fixes for CVE-2023-38703 (1)

Vendor Advisories for CVE-2023-38703 (1)

Mailing List Discussions for CVE-2023-38703 (1)

IV. Related Vulnerabilities

Same product: pjproject
Same vendor: pjsip
Same weakness: CWE-416

V. Comments for CVE-2023-38703

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