Описание
Synapse is a Matrix reference homeserver written in python (pypi package matrix-synapse). Matrix is an ecosystem for open federated Instant Messaging and VoIP. In Synapse before version 1.33.2 "Push rules" can specify conditions under which they will match, including event_match, which matches event content against a pattern including wildcards. Certain patterns can cause very poor performance in the matching engine, leading to a denial-of-service when processing moderate length events. The issue is patched in version 1.33.2. A potential workaround might be to prevent users from making custom push rules, by blocking such requests at a reverse-proxy.
Ссылки
- PatchThird Party Advisory
- Release NotesThird Party Advisory
- PatchThird Party Advisory
- PatchThird Party Advisory
- Release NotesThird Party Advisory
- PatchThird Party Advisory
Уязвимые конфигурации
EPSS
3.7 Low
CVSS3
5.3 Medium
CVSS3
5 Medium
CVSS2
Дефекты
Связанные уязвимости
Synapse is a Matrix reference homeserver written in python (pypi package matrix-synapse). Matrix is an ecosystem for open federated Instant Messaging and VoIP. In Synapse before version 1.33.2 "Push rules" can specify conditions under which they will match, including `event_match`, which matches event content against a pattern including wildcards. Certain patterns can cause very poor performance in the matching engine, leading to a denial-of-service when processing moderate length events. The issue is patched in version 1.33.2. A potential workaround might be to prevent users from making custom push rules, by blocking such requests at a reverse-proxy.
Synapse is a Matrix reference homeserver written in python (pypi packa ...
Denial of service attack via push rule patterns in matrix-synapse
Уязвимость правил push домашнего сервера Synapse, связанная с неконтролируемым расходом ресурсов, позволяющая нарушителю вызвать отказ в обслуживании
EPSS
3.7 Low
CVSS3
5.3 Medium
CVSS3
5 Medium
CVSS2