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CVE-2022-39269— Media transport downgrade from the secure version (SRTP) to non-secure (RTP) in pjsip

Quick assessment

Affected
pjsip pjproject
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
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存在安全漏洞，该漏洞源于其在处理某些报文时，当SRTP重新启动后，PJSIP可能会错误地从使用SRTP媒体传输切换到使用基本RTP媒体传输，导致媒体发送不安全。

CVSS 9.1 · Critical EPSS 0.73% · P53

Possible ATT&CK Techniques 1 AI

T1043
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I. Basic Information for CVE-2022-39269

Vulnerability Information
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Vulnerability Title
Media transport downgrade from the secure version (SRTP) to non-secure (RTP) in pjsip
Source: CVE Program / CVE List V5
Vulnerability Description
PJSIP is a free and open source multimedia communication library written in C. When processing certain packets, PJSIP may incorrectly switch from using SRTP media transport to using basic RTP upon SRTP restart, causing the media to be sent insecurely. The vulnerability impacts all PJSIP users that use SRTP. The patch is available as commit d2acb9a in the master branch of the project and will be included in version 2.13. Users are advised to manually patch or to upgrade. There are no known workarounds for this vulnerability.
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:N
Source: CVE Program / CVE List V5
Vulnerability Type
敏感数据的明文传输
Source: CVE Program / CVE List V5
Vulnerability Title
PJSIP 安全漏洞
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存在安全漏洞，该漏洞源于其在处理某些报文时，当SRTP重新启动后，PJSIP可能会错误地从使用SRTP媒体传输切换到使用基本RTP媒体传输，导致媒体发送不安全。
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 >= 2.11, < 2.13 -

II. Public POCs for CVE-2022-39269

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III. Intelligence Information for CVE-2022-39269

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Patches & Fixes for CVE-2022-39269 (1)

Vendor Advisories for CVE-2022-39269 (3)

Mailing List Discussions for CVE-2022-39269 (1)

IV. Related Vulnerabilities

Same product: pjproject
Same vendor: pjsip
Same weakness: CWE-319

V. Comments for CVE-2022-39269

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