HIGH8.8
Matrix Synapse before 0.33.3.1 allows remote attackers to spoof events and possibly have unspecified other impacts by leveraging improper transaction and event signature validation.
CVSS 2.0MEDIUM 6.5
CVSS:2.0/AV:N/AC:L/Au:S/C:P/I:P/A:PCVSS 3.xHIGH 8.8
CVSS:3.x/CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HReferences
- https://github.com/matrix-org/synapse/issues/3796#event-1833126269
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IRW7YR2H3ASUSYX4AO4KMY3FNVDNYW3P/
- https://matrix.org/blog/2018/09/06/critical-security-update-synapse-0-33-3-1/
- https://github.com/matrix-org/synapse/issues/3796#event-1833126269
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IRW7YR2H3ASUSYX4AO4KMY3FNVDNYW3P/
- https://matrix.org/blog/2018/09/06/critical-security-update-synapse-0-33-3-1/