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CVE-2021-39215— Authentication Bypass: Forged Tokens Allow Access to Arbitrary Rooms

Quick assessment

Affected
jitsi jitsi-meet
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.

Jitsi Meet是是一组开源项目。使用户能够使用和部署具有最先进视频质量和功能的视频会议平台。 Jitsi Meet 2.0.5963之前的版本存在授权问题漏洞，该漏洞源于Prosody模块允许使用对称算法来验证JSON web令牌。这意味着可以使用任意源生成的令牌获得对受保护房间的授权。

CVSS 7.5 · High EPSS 1.23% · P66

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-39215

Vulnerability Information
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Vulnerability Title
Authentication Bypass: Forged Tokens Allow Access to Arbitrary Rooms
Source: CVE Program / CVE List V5
Vulnerability Description
Jitsi Meet is an open source video conferencing application. In versions prior to 2.0.5963, a Prosody module allows the use of symmetrical algorithms to validate JSON web tokens. This means that tokens generated by arbitrary sources can be used to gain authorization to protected rooms. This issue is fixed in Jitsi Meet 2.0.5963. There are no known workarounds aside from updating.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Jitsi Meet 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Jitsi Meet是是一组开源项目。使用户能够使用和部署具有最先进视频质量和功能的视频会议平台。 Jitsi Meet 2.0.5963之前的版本存在授权问题漏洞，该漏洞源于Prosody模块允许使用对称算法来验证JSON web令牌。这意味着可以使用任意源生成的令牌获得对受保护房间的授权。
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
jitsi jitsi-meet < 2.0.5963 -

II. Public POCs for CVE-2021-39215

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III. Intelligence Information for CVE-2021-39215

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Patches & Fixes for CVE-2021-39215 (1)

Vendor Advisories for CVE-2021-39215 (1)

IV. Related Vulnerabilities

Same product: jitsi-meet
Same vendor: jitsi
Same weakness: CWE-287

V. Comments for CVE-2021-39215

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