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Matrix is an ecosystem for open federated Instant Messaging and Voice over IP. In versions 1.41.0 and prior, unauthorised users can access the membership (list of members, with their display names) of a room if they know the ID of the room. The vulnerability is limited to rooms with `shared` history visibility. Furthermore, the unauthorised user must be using an account on a vulnerable homeserver that is in the room. Server administrators should upgrade to 1.41.1 or later in order to receive the patch. One workaround is available. Administrators of servers that use a reverse proxy could, with potentially unacceptable loss of functionality, block the endpoints: `/_matrix/client/r0/rooms/{room_id}/members` with `at` query parameter, and `/_matrix/client/unstable/rooms/{room_id}/members` with `at` query parameter.
Matrix is an ecosystem for open federated Instant Messaging and Voice over IP. In versions 1.41.0 and prior, unauthorised users can access the membership (list of members, with their display names) of a room if they know the ID of the room. The vulnerability is limited to rooms with `shared` history visibility. Furthermore, the unauthorised user must be using an account on a vulnerable homeserver that is in the room. Server administrators should upgrade to 1.41.1 or later in order to receive the patch. One workaround is available. Administrators of servers that use a reverse proxy could, with potentially unacceptable loss of functionality, block the endpoints: `/_matrix/client/r0/rooms/{room_id}/members` with `at` query parameter, and `/_matrix/client/unstable/rooms/{room_id}/members` with `at` query parameter.
NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.
Note: The NVD and the CNA have provided the same score. When this occurs only the CNA information is displayed, but the Acceptance Level icon for the CNA is given a checkmark to signify NVD concurrence.
NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.
Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.
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OR
*cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
OR
*cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
*cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
Changed
Reference Type
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2VHDEPCZ22GJFMZCWA2XZAGPOEV72POF/ No Types Assigned
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2VHDEPCZ22GJFMZCWA2XZAGPOEV72POF/ Mailing List, Third Party Advisory
OR
*cpe:2.3:a:matrix:synapse:*:*:*:*:*:*:*:* versions up to (excluding) 1.41.1
Added
CPE Configuration
OR
*cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
Added
CVSS V2
NIST (AV:N/AC:M/Au:S/C:P/I:N/A:N)
Added
CVSS V3.1
NIST AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
Added
CWE
NIST CWE-863
Changed
Reference Type
https://github.com/matrix-org/synapse/commit/cb35df940a No Types Assigned
https://github.com/matrix-org/synapse/commit/cb35df940a Patch, Third Party Advisory
Changed
Reference Type
https://github.com/matrix-org/synapse/releases/tag/v1.41.1 No Types Assigned
https://github.com/matrix-org/synapse/releases/tag/v1.41.1 Release Notes, Third Party Advisory
Changed
Reference Type
https://github.com/matrix-org/synapse/security/advisories/GHSA-3x4c-pq33-4w3q No Types Assigned
https://github.com/matrix-org/synapse/security/advisories/GHSA-3x4c-pq33-4w3q Third Party Advisory
Changed
Reference Type
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PXT7ID7DNBRN2TVTETU3SYQHJKEG6PXN/ No Types Assigned
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PXT7ID7DNBRN2TVTETU3SYQHJKEG6PXN/ Mailing List, Third Party Advisory
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