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 1.25.0, a malicious homeserver could redirect requests to their .well-known file to a large file. This can lead to a denial of service attack where homeservers will consume significantly more resources when requesting the .well-known file of a malicious homeserver. This affects any server which accepts federation requests from untrusted servers. Issue is resolved in version 1.25.0. As a workaround the federation_domain_whitelist setting can be used to restrict the homeservers communicated with over federation.
| Релиз | Статус | Примечание |
|---|---|---|
| bionic | ignored | end of standard support, was needs-triage |
| esm-apps/bionic | needs-triage | |
| esm-apps/focal | needs-triage | |
| esm-apps/jammy | not-affected | 1.26.0-3 |
| esm-apps/noble | not-affected | 1.26.0-3 |
| esm-infra-legacy/trusty | DNE | |
| focal | ignored | end of standard support, was needs-triage |
| groovy | ignored | end of life |
| hirsute | not-affected | 1.26.0-3 |
| impish | not-affected | 1.26.0-3 |
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Ссылки на источники
EPSS
4.3 Medium
CVSS2
4.3 Medium
CVSS3
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 1.25.0, a malicious homeserver could redirect requests to their .well-known file to a large file. This can lead to a denial of service attack where homeservers will consume significantly more resources when requesting the .well-known file of a malicious homeserver. This affects any server which accepts federation requests from untrusted servers. Issue is resolved in version 1.25.0. As a workaround the `federation_domain_whitelist` setting can be used to restrict the homeservers communicated with over federation.
Synapse is a Matrix reference homeserver written in python (pypi packa ...
Denial of service attack via .well-known lookups
EPSS
4.3 Medium
CVSS2
4.3 Medium
CVSS3