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CVE-2021-40823

Quick assessment

Affected
n/a n/a
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.

Matrix是一个雄心勃勃的新生态系统，用于开放联合即时消息和 VoIP。 Matrix Javascript SDK 12.4.1之前版本存在加密问题漏洞，该漏洞源于设备的房间钥匙共享功能存在逻辑错误，导致身份验证不充分，从而可以冒充请求钥匙的设备。

AI Predicted 8.6 Difficulty: Easy EPSS 0.66% · P49
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I. Basic Information for CVE-2021-40823

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A logic error in the room key sharing functionality of matrix-js-sdk (aka Matrix Javascript SDK) before 12.4.1 allows a malicious Matrix homeserver present in an encrypted room to steal room encryption keys (via crafted Matrix protocol messages) that were originally sent by affected Matrix clients participating in that room. This allows the homeserver to decrypt end-to-end encrypted messages sent by affected clients.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Matrix 加密问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Matrix是一个雄心勃勃的新生态系统，用于开放联合即时消息和 VoIP。 Matrix Javascript SDK 12.4.1之前版本存在加密问题漏洞，该漏洞源于设备的房间钥匙共享功能存在逻辑错误，导致身份验证不充分，从而可以冒充请求钥匙的设备。
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
- n/a n/a -

II. Public POCs for CVE-2021-40823

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III. Intelligence Information for CVE-2021-40823

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Security Blog Posts for CVE-2021-40823 (1)

Other References for CVE-2021-40823 (1)

Same Patch Batch · n/a · 2021-09-13 · 27 CVEs total

CVE-2021-40866 9.8 CRITICAL NETGEAR 安全漏洞
CVE-2021-40867 7.8 HIGH Netgear NETGEAR 竞争条件问题漏洞
CVE-2021-32134 GPAC 代码问题漏洞
CVE-2021-33366 GPAC 安全漏洞
CVE-2021-33365 GPAC 缓冲区错误漏洞
CVE-2021-33364 GPAC 资源管理错误漏洞
CVE-2021-33363 GPAC 缓冲区错误漏洞
CVE-2021-33361 GPAC 缓冲区错误漏洞
CVE-2021-40870 Aviatrix Controller 代码问题漏洞
CVE-2021-40214 Gibbon 跨站脚本漏洞
CVE-2020-27969 Yandex Browser 访问控制错误漏洞
CVE-2020-27970 Yandex Browser 安全漏洞
CVE-2021-32136 GPAC 缓冲区错误漏洞
CVE-2020-20672 KiteCMS 代码问题漏洞
CVE-2021-32137 GPAC 缓冲区错误漏洞
CVE-2021-32135 GPAC 代码问题漏洞
CVE-2021-32132 GPAC 代码问题漏洞
CVE-2021-29643 Paessler PRTG Network Monitor 跨站脚本漏洞
CVE-2021-38833 PHPGurukul Apartment Visitors Management System SQL注入漏洞
CVE-2021-33362 GPAC 缓冲区错误漏洞

Showing top 20 of 27 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: n/a
Same vendor: n/a

V. Comments for CVE-2021-40823

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