PYSEC-2022-262
Vulnerability from pysec - Published: 2022-09-02 20:15 - Updated: 2022-09-09 06:19
VLAI
Details
Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. The Matrix specification specifies a list of event authorization rules which must be checked when determining if an event should be accepted into a room. In versions of Synapse up to and including version 1.61.0, some of these rules are not correctly applied. An attacker could craft events which would be accepted by Synapse but not a spec-conformant server, potentially causing divergence in the room state between servers. Administrators of homeservers with federation enabled are advised to upgrade to version 1.62.0 or higher. Federation can be disabled by setting federation_domain_whitelist to an empty list ([]) as a workaround.
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": "1.62.0"
}
],
"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",
"1.41.1",
"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",
"1.50.0",
"1.50.0rc1",
"1.50.0rc2",
"1.50.1",
"1.50.2",
"1.51.0",
"1.51.0rc1",
"1.51.0rc2",
"1.52.0",
"1.52.0rc1",
"1.53.0",
"1.53.0rc1",
"1.54.0",
"1.54.0rc1",
"1.55.0",
"1.55.0rc1",
"1.55.1",
"1.55.2",
"1.56.0",
"1.56.0rc1",
"1.57.0",
"1.57.0rc1",
"1.57.1",
"1.58.0",
"1.58.0rc2",
"1.58.1",
"1.59.0",
"1.59.0rc1",
"1.59.0rc2",
"1.59.1",
"1.6.0",
"1.6.0rc1",
"1.6.0rc2",
"1.6.1",
"1.60.0",
"1.60.0rc1",
"1.60.0rc2",
"1.61.0",
"1.61.0rc1",
"1.61.1",
"1.62.0rc1",
"1.62.0rc2",
"1.62.0rc3",
"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-2022-31152",
"GHSA-jhjh-776m-4765"
],
"details": "Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. The Matrix specification specifies a list of [event authorization rules](https://spec.matrix.org/v1.2/rooms/v9/#authorization-rules) which must be checked when determining if an event should be accepted into a room. In versions of Synapse up to and including version 1.61.0, some of these rules are not correctly applied. An attacker could craft events which would be accepted by Synapse but not a spec-conformant server, potentially causing divergence in the room state between servers. Administrators of homeservers with federation enabled are advised to upgrade to version 1.62.0 or higher. Federation can be disabled by setting [`federation_domain_whitelist`](https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html#federation_domain_whitelist) to an empty list (`[]`) as a workaround.",
"id": "PYSEC-2022-262",
"modified": "2022-09-09T06:19:32.373264Z",
"published": "2022-09-02T20:15:00Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/matrix-org/synapse/pull/13087"
},
{
"type": "WEB",
"url": "https://github.com/matrix-org/synapse/pull/13088"
},
{
"type": "WEB",
"url": "https://github.com/matrix-org/synapse/releases/tag/v1.62.0"
},
{
"type": "ADVISORY",
"url": "https://github.com/matrix-org/synapse/security/advisories/GHSA-jhjh-776m-4765"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
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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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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