CVE-2021-39164lowCWE-200

CVE-2021-39164: falha de baixa gravidade em matrix-org synapse

Improper authorisation of /members discloses room membership to non-members

Publicada em · Atualizada em

Seguir esta CVE+ Monitorar synapse+ Monitorar matrix-synapse

Aviso por e-mail quando ela entrar no KEV, ganhar PoC pública ou subir de nota.

8Vexday Risk Score

Sem sinal de exploração. Nenhum artefato público de exploração conhecido até agora.

ssvc Trackcvss 3.1epss 1.5%
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.
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
Produtos afetados
matrix-org · synapse
CVEs relacionadas — matrix-org synapse

No mesmo produto, das mais perigosas para as menos.

CVE-2020-26257MEDIUMDenial of service attack via incorrect parameters to federation APIsEPSS 2.4%CVE-2021-21274MEDIUMDenial of service attack via .well-known lookupsEPSS 2.2%CVE-2021-21273LOWOpen redirects on some federation and push requestsEPSS 1.8%CVE-2022-31052MEDIUMURL previews can crash Synapse media repositories or Synapse monolithsEPSS 1.7%CVE-2021-29471LOWDenial of service in Matrix SynapseEPSS 1.6%CVE-2021-21393MEDIUMDenial of service (via resource exhaustion) due to improper input validation on groups/communities endpointsEPSS 1.6%