Описание
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.
| Релиз | Статус | Примечание |
|---|---|---|
| esm-apps/bionic | ignored | patch infeasible |
| esm-apps/focal | ignored | patch infeasible |
| esm-apps/jammy | released | 1.53.0-1ubuntu0.1~esm2 |
| esm-apps/noble | ignored | fix infeasible |
| focal | ignored | end of standard support, was ignored [patch infeasible] |
| jammy | needed | |
| mantic | ignored | end of life, was needs-triage |
| noble | ignored | fix infeasible |
| oracular | ignored | end of life, was ignored [fix infeasible] |
| upstream | released | 1.105.1 |
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| Релиз | Статус | Примечание |
|---|---|---|
| devel | needs-triage | |
| esm-apps/bionic | needs-triage | |
| esm-apps/focal | needs-triage | |
| esm-apps/jammy | needs-triage | |
| esm-apps/noble | needs-triage | |
| esm-apps/xenial | needs-triage | |
| focal | ignored | end of standard support, was needs-triage |
| jammy | needs-triage | |
| mantic | ignored | end of life, was needs-triage |
| noble | needs-triage |
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Ссылки на источники
EPSS
6.5 Medium
CVSS3
Связанные уязвимости
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.
Synapse is an open-source Matrix homeserver. A remote Matrix user with ...
Synapse V2 state resolution weakness allows Denial of Service (DoS)
EPSS
6.5 Medium
CVSS3