PYSEC-2021-425
Vulnerability from pysec - Published: 2021-08-31 17:15 - Updated: 2021-11-16 03:58
VLAI?
Details
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.
Impacted products
| Name | purl | matrix-synapse | pkg:pypi/matrix-synapse |
|---|
Aliases
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "matrix-synapse",
"purl": "pkg:pypi/matrix-synapse"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "cb35df940a"
}
],
"repo": "https://github.com/matrix-org/synapse",
"type": "GIT"
},
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.41.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.33.5",
"0.33.5.1",
"0.33.6",
"0.33.6rc1",
"0.33.7",
"0.33.7rc1",
"0.33.7rc2",
"0.33.8",
"0.33.8rc2",
"0.33.9",
"0.34.0",
"0.34.0.1",
"0.34.0rc1",
"0.34.0rc2",
"0.34.1.1",
"0.99.0",
"0.99.0rc1",
"0.99.0rc2",
"0.99.0rc3",
"0.99.0rc4",
"0.99.1",
"0.99.1.1",
"0.99.1rc1",
"0.99.1rc2",
"0.99.2",
"0.99.2rc1",
"0.99.3",
"0.99.3.1",
"0.99.3.2",
"0.99.3rc1",
"0.99.4",
"0.99.4rc1",
"0.99.5",
"0.99.5.1",
"0.99.5.2",
"0.99.5rc1",
"1.0.0",
"1.0.0rc1",
"1.0.0rc2",
"1.0.0rc3",
"1.1.0",
"1.1.0rc1",
"1.1.0rc2",
"1.10.0",
"1.10.0rc1",
"1.10.0rc2",
"1.10.0rc3",
"1.10.0rc5",
"1.10.1",
"1.11.0",
"1.11.0rc1",
"1.11.1",
"1.12.0",
"1.12.0rc1",
"1.12.1",
"1.12.1rc1",
"1.12.2",
"1.12.3",
"1.12.4",
"1.12.4rc1",
"1.13.0",
"1.13.0rc1",
"1.13.0rc2",
"1.13.0rc3",
"1.14.0",
"1.14.0rc1",
"1.14.0rc2",
"1.15.0",
"1.15.0rc1",
"1.15.1",
"1.15.2",
"1.16.0",
"1.16.0rc1",
"1.16.0rc2",
"1.16.1",
"1.17.0",
"1.17.0rc1",
"1.18.0",
"1.18.0rc1",
"1.18.0rc2",
"1.19.0",
"1.19.0rc1",
"1.19.1",
"1.19.1rc1",
"1.19.2",
"1.19.3",
"1.2.0",
"1.2.0rc1",
"1.2.0rc2",
"1.2.1",
"1.20.0",
"1.20.0rc1",
"1.20.0rc2",
"1.20.0rc3",
"1.20.0rc4",
"1.20.0rc5",
"1.20.1",
"1.21.0",
"1.21.0rc1",
"1.21.0rc2",
"1.21.0rc3",
"1.21.1",
"1.21.2",
"1.22.0",
"1.22.0rc1",
"1.22.0rc2",
"1.22.1",
"1.23.0",
"1.23.0rc1",
"1.23.1",
"1.24.0",
"1.24.0rc1",
"1.24.0rc2",
"1.25.0",
"1.25.0rc1",
"1.26.0",
"1.26.0rc1",
"1.26.0rc2",
"1.27.0",
"1.27.0rc1",
"1.27.0rc2",
"1.28.0",
"1.28.0rc1",
"1.29.0",
"1.29.0rc1",
"1.3.0",
"1.3.0rc1",
"1.3.1",
"1.30.0",
"1.30.0rc1",
"1.30.1",
"1.31.0",
"1.31.0rc1",
"1.32.0",
"1.32.0rc1",
"1.32.1",
"1.32.2",
"1.33.0",
"1.33.0rc1",
"1.33.0rc2",
"1.33.1",
"1.33.2",
"1.34.0",
"1.34.0rc1",
"1.35.0",
"1.35.0rc1",
"1.35.0rc2",
"1.35.0rc3",
"1.35.1",
"1.36.0",
"1.36.0rc1",
"1.36.0rc2",
"1.37.0",
"1.37.0rc1",
"1.37.1",
"1.37.1rc1",
"1.38.0",
"1.38.0rc1",
"1.38.0rc2",
"1.38.0rc3",
"1.38.1",
"1.39.0",
"1.39.0rc1",
"1.39.0rc2",
"1.39.0rc3",
"1.4.0",
"1.4.0rc1",
"1.4.0rc2",
"1.4.1",
"1.4.1rc1",
"1.40.0",
"1.40.0rc1",
"1.40.0rc2",
"1.40.0rc3",
"1.41.0",
"1.41.0rc1",
"1.5.0",
"1.5.0rc1",
"1.5.0rc2",
"1.5.1",
"1.6.0",
"1.6.0rc1",
"1.6.0rc2",
"1.6.1",
"1.7.0",
"1.7.0rc1",
"1.7.0rc2",
"1.7.1",
"1.7.2",
"1.7.3",
"1.8.0",
"1.8.0rc1",
"1.9.0",
"1.9.0.dev1",
"1.9.0.dev2",
"1.9.0rc1",
"1.9.1"
]
}
],
"aliases": [
"CVE-2021-39164",
"GHSA-3x4c-pq33-4w3q"
],
"details": "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.",
"id": "PYSEC-2021-425",
"modified": "2021-11-16T03:58:44.571857Z",
"published": "2021-08-31T17:15:00Z",
"references": [
{
"type": "ADVISORY",
"url": "https://github.com/matrix-org/synapse/security/advisories/GHSA-3x4c-pq33-4w3q"
},
{
"type": "WEB",
"url": "https://github.com/matrix-org/synapse/releases/tag/v1.41.1"
},
{
"type": "FIX",
"url": "https://github.com/matrix-org/synapse/commit/cb35df940a"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PXT7ID7DNBRN2TVTETU3SYQHJKEG6PXN/"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2VHDEPCZ22GJFMZCWA2XZAGPOEV72POF/"
}
]
}
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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.
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