Oct. 10, 2023, 6:15 p.m. |

National Vulnerability Database web.nvd.nist.gov

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 …

acl administrators cve denial of service event federation foundation impact malicious matrix org performance persistent running server service synapse version version 1 written

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