matrix-js-sdk has insufficient MXC URI validation which allows client-side path traversal

中 5.3CVE-2024-50336 · GHSA-xvg8-m4x3-w6xr · 12/11/2024 公開 · 17/06/2026 更新

要点

CVE-2024-50336 は matrix-js-sdk に影響する深刻度「中」 (CVSS 5.3) の脆弱性です。
今後30日間に悪用される確率（EPSS）：0.83%（全脆弱性の 57.6% より高い）。
対処：34.11.1 以降に更新してください。

パッケージ	影響を受けるバージョン	修正済みバージョン
matrix-js-sdk npm	`< 34.11.1`	`34.11.1`

概要

Summary

matrix-js-sdk before 34.11.0 is vulnerable to client-side path traversal via crafted MXC URIs. A malicious room member can trigger clients based on the matrix-js-sdk to issue arbitrary authenticated GET requests to the client's homeserver.

Details

The Matrix specification demands homeservers to perform validation of the server-name and media-id components of MXC URIs with the intent to prevent path traversal. However, it is not mentioned that a similar check must also be performed on the client to prevent client-side path traversal. matrix-js-sdk fails to perform this validation.

Patches

Fixed in matrix-js-sdk 34.11.1.

Workarounds

None.

References

NVD の説明

matrix-js-sdk is a Matrix messaging protocol Client-Server SDK for JavaScript. matrix-js-sdk before 34.11.0 is vulnerable to client-side path traversal via crafted MXC URIs. A malicious room member can trigger clients based on the matrix-js-sdk to issue arbitrary authenticated GET requests to the client's homeserver. Fixed in matrix-js-sdk 34.11.1.