Vulnerability Information
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Vulnerability Title
Synapse's V2 state resolution weakness allows DoS from remote room members
Vulnerability Description
Synapse is an open-source Matrix homeserver. A remote Matrix user with malicious intent, sharing a room with Synapse instances before 1.105.1, can dispatch specially crafted events to exploit a weakness in the V2 state resolution algorithm. This can induce high CPU consumption and accumulate excessive data in the database of such instances, resulting in a denial of service. Servers in private federations, or those that do not federate, are not affected. Server administrators should upgrade to 1.105.1 or later. Some workarounds are available. One can ban the malicious users or ACL block servers from the rooms and/or leave the room and purge the room using the admin API.
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Vulnerability Type
不加限制或调节的资源分配
Vulnerability Title
synapse 安全漏洞
Vulnerability Description
synapse是一个应用程序。用于开放式联合即时消息和VoIP。 Synapse 1.105.1之前版本存在安全漏洞，该漏洞源于身份验证链索引存在安全问题，允许攻击者通过磁盘填充和高使用 CPU 进行拒绝服务。
CVSS Information
N/A
Vulnerability Type
N/A