CVE-2024-53867 – matrix-synapse

Package

Manager: pip
Name: matrix-synapse
Vulnerable Version: >=1.113.0rc1 <1.120.1

Severity

Level: Medium

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

EPSS: 0.00033 pctl0.07842

Details

Synapse Matrix has a partial room state leak via Sliding Sync ### Impact The Sliding Sync feature on Synapse versions between 1.113.0rc1 and 1.120.0 can leak partial room state changes to users no longer in a room. Non-state events, like messages, are unaffected. ### Patches Synapse version 1.120.1 fixes the problem. ### Workarounds Disable Sliding Sync. ### References https://github.com/matrix-org/matrix-spec-proposals/pull/4186 https://github.com/element-hq/synapse/blob/d80cd57c54427687afcb48740d99219c88a0fff1/synapse/config/experimental.py#L341-L344 ### For more information If you have any questions or comments about this advisory, please email us at [security at element.io](mailto:security@element.io).

Metadata

Created: 2024-12-03T18:44:23Z
Modified: 2024-12-03T18:44:23Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2024/12/GHSA-56w4-5538-8v8h/GHSA-56w4-5538-8v8h.json
CWE IDs: ["CWE-497"]
Alternative ID: GHSA-56w4-5538-8v8h
Finding: F017
Auto approve: 1