FKIE_CVE-2023-43796

Vulnerability from fkie_nvd - Published: 2023-10-31 17:15 - Updated: 2025-02-13 17:17
Severity ?
5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Summary
Synapse is an open-source Matrix homeserver Prior to versions 1.95.1 and 1.96.0rc1, cached device information of remote users can be queried from Synapse. This can be used to enumerate the remote users known to a homeserver. System administrators are encouraged to upgrade to Synapse 1.95.1 or 1.96.0rc1 to receive a patch. As a workaround, the `federation_domain_whitelist` can be used to limit federation traffic with a homeserver.
References
security-advisories@github.comhttps://github.com/matrix-org/synapse/commit/daec55e1fe120c564240c5386e77941372bf458fPatch
security-advisories@github.comhttps://github.com/matrix-org/synapse/security/advisories/GHSA-mp92-3jfm-3575Vendor Advisory
security-advisories@github.comhttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2IDEEZMFJBDLTFHQUTZRJJNCOZGQ2ZVS/Mailing List
security-advisories@github.comhttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VH3RNC5ZPQZ4OKPSL4E6BBJSZOQLGDEY/Mailing List
security-advisories@github.comhttps://security.gentoo.org/glsa/202401-12
af854a3a-2127-422b-91ae-364da2661108https://github.com/matrix-org/synapse/commit/daec55e1fe120c564240c5386e77941372bf458fPatch
af854a3a-2127-422b-91ae-364da2661108https://github.com/matrix-org/synapse/security/advisories/GHSA-mp92-3jfm-3575Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2IDEEZMFJBDLTFHQUTZRJJNCOZGQ2ZVS/Mailing List
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VH3RNC5ZPQZ4OKPSL4E6BBJSZOQLGDEY/Mailing List
af854a3a-2127-422b-91ae-364da2661108https://security.gentoo.org/glsa/202401-12
Impacted products
Vendor Product Version
matrix synapse *
fedoraproject fedora 38
fedoraproject fedora 39
To clipboard 

{
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  "descriptions": [
    {
      "lang": "en",
      "value": "Synapse is an open-source Matrix homeserver Prior to versions 1.95.1 and 1.96.0rc1, cached device information of remote users can be queried from Synapse. This can be used to enumerate the remote users known to a homeserver. System administrators are encouraged to upgrade to Synapse 1.95.1 or 1.96.0rc1 to receive a patch. As a workaround, the `federation_domain_whitelist` can be used to limit federation traffic with a homeserver."
    },
    {
      "lang": "es",
      "value": "Synapse es un servidor dom\u00e9stico Matrix de c\u00f3digo abierto. Antes de las versiones 1.95.1 y 1.96.0rc1, la informaci\u00f3n del dispositivo almacenado en cach\u00e9 de usuarios remotos se puede consultar desde Synapse. Esto se puede utilizar para enumerar los usuarios remotos conocidos por un servidor dom\u00e9stico. Se recomienda a los administradores del sistema que actualicen a Synapse 1.95.1 o 1.96.0rc1 para recibir un parche. Como workaround, se puede utilizar `federation_domain_whitelist` para limitar el tr\u00e1fico de federaci\u00f3n con un servidor dom\u00e9stico."
    }
  ],
  "id": "CVE-2023-43796",
  "lastModified": "2025-02-13T17:17:13.480",
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}


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Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.