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CVE-2024-47080— matrix-js-sdk keys sent via `sendSharedHistoryKeys` vulnerable to interception by malicious homeserver

Quick assessment

Affected
matrix-org matrix-js-sdk
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-js-sdk是Matrix开源的一个应用组件。 matrix-js-sdk存在信息泄露漏洞，该漏洞源于MatrixClient.sendSharedHistoryKeys函数容易受到恶意主服务器的拦截。

AI Predicted 5.3 Difficulty: Easy EPSS 0.68% · P51
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I. Basic Information for CVE-2024-47080

Vulnerability Information
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Vulnerability Title
matrix-js-sdk keys sent via `sendSharedHistoryKeys` vulnerable to interception by malicious homeserver
Source: CVE Program / CVE List V5
Vulnerability Description
matrix-js-sdk is the Matrix Client-Server SDK for JavaScript and TypeScript. In matrix-js-sdk versions versions 9.11.0 through 34.7.0, the method `MatrixClient.sendSharedHistoryKeys` is vulnerable to interception by malicious homeservers. The method was introduced by MSC3061) and is commonly used to share historical message keys with newly invited users, granting them access to past messages in the room. However, it unconditionally sends these "shared" keys to all of the invited user's devices, regardless of whether the user's cryptographic identity is verified or whether the user's devices are signed by that identity. This allows the attacker to potentially inject its own devices to receive sensitive historical keys without proper security checks. Note that this only affects clients running the SDK with the legacy crypto stack. Clients using the new Rust cryptography stack (i.e. those that call `MatrixClient.initRustCrypto()` instead of `MatrixClient.initCrypto()`) are unaffected by this vulnerability, because `MatrixClient.sendSharedHistoryKeys()` raises an exception in such environments. The vulnerability was fixed in matrix-js-sdk 34.8.0 by removing the vulnerable functionality. As a workaround, remove use of affected functionality from clients.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
matrix-js-sdk 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
matrix-js-sdk是Matrix开源的一个应用组件。 matrix-js-sdk存在信息泄露漏洞，该漏洞源于MatrixClient.sendSharedHistoryKeys函数容易受到恶意主服务器的拦截。
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
matrix-org matrix-js-sdk >= 9.11.0, < 34.8.0 -

II. Public POCs for CVE-2024-47080

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III. Intelligence Information for CVE-2024-47080

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Patches & Fixes for CVE-2024-47080 (1)

IV. Related Vulnerabilities

Same product: matrix-js-sdk
Same vendor: matrix-org
Same weakness: CWE-200

V. Comments for CVE-2024-47080

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