pysec-2024-50
Vulnerability from pysec
Published
2024-04-23 18:15
Modified
2024-04-23 21:18
Details
Synapse is an open-source Matrix homeserver. A remote Matrix user with malicious intent, sharing a room with Synapse instances before 1.105.1, can dispatch specially crafted events to exploit a weakness in the V2 state resolution algorithm. This can induce high CPU consumption and accumulate excessive data in the database of such instances, resulting in a denial of service. Servers in private federations, or those that do not federate, are not affected. Server administrators should upgrade to 1.105.1 or later. Some workarounds are available. One can ban the malicious users or ACL block servers from the rooms and/or leave the room and purge the room using the admin API.
Aliases
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "matrix-synapse",
"purl": "pkg:pypi/matrix-synapse"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "55b0aa847a61774b6a3acdc4b177a20dc019f01a"
}
],
"repo": "https://github.com/element-hq/synapse",
"type": "GIT"
},
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.105.1"
}
],
"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",
"1.100.0",
"1.100.0rc2",
"1.100.0rc3",
"1.101.0",
"1.101.0rc1",
"1.102.0",
"1.102.0rc1",
"1.103.0",
"1.103.0rc1",
"1.104.0",
"1.104.0rc1",
"1.105.0",
"1.105.0rc1",
"1.11.0",
"1.11.0rc1",
"1.11.1",
"1.12.0",
"1.12.0rc1",
"1.12.1",
"1.12.1rc1",
"1.12.2",
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"1.12.4rc1",
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"1.14.0rc1",
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"1.15.0",
"1.15.0rc1",
"1.15.1",
"1.15.2",
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"1.16.0rc1",
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"1.16.1",
"1.17.0",
"1.17.0rc1",
"1.18.0",
"1.18.0rc1",
"1.18.0rc2",
"1.19.0",
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"1.19.1",
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"1.21.1",
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"1.22.0",
"1.22.0rc1",
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"1.22.1",
"1.23.0",
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"1.26.0rc1",
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"1.3.0",
"1.3.0rc1",
"1.3.1",
"1.30.0",
"1.30.0rc1",
"1.30.1",
"1.31.0",
"1.31.0rc1",
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"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",
"1.41.1",
"1.42.0",
"1.42.0rc1",
"1.42.0rc2",
"1.43.0",
"1.43.0rc1",
"1.43.0rc2",
"1.44.0",
"1.44.0rc1",
"1.44.0rc2",
"1.44.0rc3",
"1.45.0",
"1.45.0rc1",
"1.45.0rc2",
"1.45.1",
"1.46.0",
"1.46.0rc1",
"1.47.0",
"1.47.0rc1",
"1.47.0rc2",
"1.47.0rc3",
"1.47.1",
"1.48.0",
"1.48.0rc1",
"1.49.0",
"1.49.0rc1",
"1.49.2",
"1.5.0",
"1.5.0rc1",
"1.5.0rc2",
"1.5.1",
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"1.76.0rc1",
"1.76.0rc2",
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"1.77.0rc1",
"1.77.0rc2",
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"1.81.0rc1",
"1.81.0rc2",
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"1.82.0rc1",
"1.83.0",
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"1.9.0.dev2",
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"1.91.0",
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"1.98.0",
"1.98.0rc1",
"1.99.0",
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]
}
],
"aliases": [
"CVE-2024-31208",
"GHSA-3h7q-rfh9-xm4v"
],
"details": "Synapse is an open-source Matrix homeserver. A remote Matrix user with malicious intent, sharing a room with Synapse instances before 1.105.1, can dispatch specially crafted events to exploit a weakness in the V2 state resolution algorithm. This can induce high CPU consumption and accumulate excessive data in the database of such instances, resulting in a denial of service. Servers in private federations, or those that do not federate, are not affected. Server administrators should upgrade to 1.105.1 or later. Some workarounds are available. One can ban the malicious users or ACL block servers from the rooms and/or leave the room and purge the room using the admin API.",
"id": "PYSEC-2024-50",
"modified": "2024-04-23T21:18:51.688096+00:00",
"published": "2024-04-23T18:15:00+00:00",
"references": [
{
"type": "ADVISORY",
"url": "https://github.com/element-hq/synapse/security/advisories/GHSA-3h7q-rfh9-xm4v"
},
{
"type": "FIX",
"url": "https://github.com/element-hq/synapse/commit/55b0aa847a61774b6a3acdc4b177a20dc019f01a"
},
{
"type": "WEB",
"url": "https://github.com/element-hq/synapse/releases/tag/v1.105.1"
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.