gsd-2020-26890
Vulnerability from gsd
Modified
2023-12-13 01:22
Details
Matrix Synapse before 1.20.0 erroneously permits non-standard NaN, Infinity, and -Infinity JSON values in fields of m.room.member events, allowing remote attackers to execute a denial of service attack against the federation and common Matrix clients. If such a malformed event is accepted into the room's state, the impact is long-lasting and is not fixed by an upgrade to a newer version, requiring the event to be manually redacted instead. Since events are replicated to servers of other room members, the impact is not constrained to the server of the event sender.
Aliases
Aliases
{
"GSD": {
"alias": "CVE-2020-26890",
"description": "Matrix Synapse before 1.20.0 erroneously permits non-standard NaN, Infinity, and -Infinity JSON values in fields of m.room.member events, allowing remote attackers to execute a denial of service attack against the federation and common Matrix clients. If such a malformed event is accepted into the room\u0027s state, the impact is long-lasting and is not fixed by an upgrade to a newer version, requiring the event to be manually redacted instead. Since events are replicated to servers of other room members, the impact is not constrained to the server of the event sender.",
"id": "GSD-2020-26890",
"references": [
"https://www.suse.com/security/cve/CVE-2020-26890.html",
"https://security.archlinux.org/CVE-2020-26890"
]
},
"gsd": {
"metadata": {
"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
},
"osvSchema": {
"aliases": [
"CVE-2020-26890"
],
"details": "Matrix Synapse before 1.20.0 erroneously permits non-standard NaN, Infinity, and -Infinity JSON values in fields of m.room.member events, allowing remote attackers to execute a denial of service attack against the federation and common Matrix clients. If such a malformed event is accepted into the room\u0027s state, the impact is long-lasting and is not fixed by an upgrade to a newer version, requiring the event to be manually redacted instead. Since events are replicated to servers of other room members, the impact is not constrained to the server of the event sender.",
"id": "GSD-2020-26890",
"modified": "2023-12-13T01:22:08.728432Z",
"schema_version": "1.4.0"
}
},
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}
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"name": "https://github.com/matrix-org/synapse/security/advisories/GHSA-4mp3-385r-v63f",
"refsource": "MISC",
"url": "https://github.com/matrix-org/synapse/security/advisories/GHSA-4mp3-385r-v63f"
},
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},
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"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/G7YXMMYQP46PYL664JQUXCA3LPBJU7DQ/"
}
]
}
},
"gitlab.com": {
"advisories": [
{
"affected_range": "\u003c1.20.0",
"affected_versions": "All versions before 1.20.0",
"cvss_v2": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
"cvss_v3": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"cwe_ids": [
"CWE-1035",
"CWE-74",
"CWE-937"
],
"date": "2021-07-21",
"description": "Matrix Synapse requiring the event to be manually redacted instead. Since events are replicated to servers of other room members, the impact is not constrained to the server of the event sender.",
"fixed_versions": [
"1.20.0"
],
"identifier": "CVE-2020-26890",
"identifiers": [
"CVE-2020-26890",
"GHSA-4mp3-385r-v63f"
],
"not_impacted": "All versions starting from 1.20.0",
"package_slug": "pypi/matrix-synapse",
"pubdate": "2020-11-24",
"solution": "Upgrade to version 1.20.0 or above.",
"title": "Injection Vulnerability",
"urls": [
"https://nvd.nist.gov/vuln/detail/CVE-2020-26890"
],
"uuid": "bb1b9a19-ce91-4ed9-b80a-584f233e7f86"
}
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},
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},
"impact": {
"baseMetricV2": {
"acInsufInfo": false,
"cvssV2": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "PARTIAL",
"baseScore": 5.0,
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
"version": "2.0"
},
"exploitabilityScore": 10.0,
"impactScore": 2.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"severity": "MEDIUM",
"userInteractionRequired": false
},
"baseMetricV3": {
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"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 3.6
}
},
"lastModifiedDate": "2021-07-21T11:39Z",
"publishedDate": "2020-11-24T03:15Z"
}
}
}
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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.
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- 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.
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