要点
- CVE-2023-42453 は matrix-synapse, synapse (matrix) に影響する深刻度「中」 (CVSS 4.3) の脆弱性です。
- 今後30日間に悪用される確率（EPSS）：0.78%（全脆弱性の 55.8% より高い）。
- 対処：1.93.0 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-synapse PyPI | ≥ 0.34.0, < 1.93.0≥ 1.34.0, < 1.93.0
| 1.93.0
|
| synapse | ≥ 1.34.0, < 1.93.0
| 1.93.0
|
概要
Impact
Users were able to forge read receipts for any event (if they knew the room ID and event ID). Note that the users were not able to view the events, but simply mark it as read. This could be confusing as clients will show the event as read by the user, even if they are not in the room.
Patches
https://github.com/matrix-org/synapse/pull/16327
Workarounds
There is no workaround.
NVD の説明
Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. Users were able to forge read receipts for any event (if they knew the room ID and event ID). Note that the users were not able to view the events, but simply mark it as read. This could be confusing as clients will show the event as read by the user, even if they are not in the room. This issue has been patched in version 1.93.0. Users are advised to upgrade. There are no known workarounds for this issue.
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