Allocation of Resources Without Limits or Throttling Affecting synapse package, versions <1.94.0-r0


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.17% (55th percentile)

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  • Snyk IDSNYK-ALPINE321-SYNAPSE-8489692
  • published6 Dec 2024
  • disclosed10 Oct 2023

Introduced: 10 Oct 2023

CVE-2023-45129  (opens in a new tab)
CWE-770  (opens in a new tab)

How to fix?

Upgrade Alpine:3.21 synapse to version 1.94.0-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream synapse package and not the synapse package as distributed by Alpine. See How to fix? for Alpine:3.21 relevant fixed versions and status.

Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. Prior to version 1.94.0, a malicious server ACL event can impact performance temporarily or permanently leading to a persistent denial of service. Homeservers running on a closed federation (which presumably do not need to use server ACLs) are not affected. Server administrators are advised to upgrade to Synapse 1.94.0 or later. As a workaround, rooms with malicious server ACL events can be purged and blocked using the admin API.

CVSS Scores

version 3.1