GSD-2021-32654
Vulnerability from gsd - Updated: 2023-12-13 01:23Details
Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.11, 20.0.10, and 21.0.2, an attacker is able to receive write/read privileges on any Federated File Share. Since public links can be added as federated file share, this can also be exploited on any public link. Users can upgrade to patched versions (19.0.11, 20.0.10 or 21.0.2) or, as a workaround, disable federated file sharing.
Aliases
Aliases
{
"GSD": {
"alias": "CVE-2021-32654",
"description": "Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.11, 20.0.10, and 21.0.2, an attacker is able to receive write/read privileges on any Federated File Share. Since public links can be added as federated file share, this can also be exploited on any public link. Users can upgrade to patched versions (19.0.11, 20.0.10 or 21.0.2) or, as a workaround, disable federated file sharing.",
"id": "GSD-2021-32654",
"references": [
"https://security.archlinux.org/CVE-2021-32654"
]
},
"gsd": {
"metadata": {
"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
},
"osvSchema": {
"aliases": [
"CVE-2021-32654"
],
"details": "Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.11, 20.0.10, and 21.0.2, an attacker is able to receive write/read privileges on any Federated File Share. Since public links can be added as federated file share, this can also be exploited on any public link. Users can upgrade to patched versions (19.0.11, 20.0.10 or 21.0.2) or, as a workaround, disable federated file sharing.",
"id": "GSD-2021-32654",
"modified": "2023-12-13T01:23:09.043118Z",
"schema_version": "1.4.0"
}
},
"namespaces": {
"cve.org": {
"CVE_data_meta": {
"ASSIGNER": "security-advisories@github.com",
"ID": "CVE-2021-32654",
"STATE": "PUBLIC",
"TITLE": "Attacker can obtain write access to any federated share/public link"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "security-advisories",
"version": {
"version_data": [
{
"version_value": "\u003c 19.0.11"
},
{
"version_value": "\u003e= 20.0.0, \u003c 20.0.10"
},
{
"version_value": "\u003e= 21.0.0, \u003c 21.0.2"
}
]
}
}
]
},
"vendor_name": "nextcloud"
}
]
}
},
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
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{
"lang": "eng",
"value": "Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.11, 20.0.10, and 21.0.2, an attacker is able to receive write/read privileges on any Federated File Share. Since public links can be added as federated file share, this can also be exploited on any public link. Users can upgrade to patched versions (19.0.11, 20.0.10 or 21.0.2) or, as a workaround, disable federated file sharing."
}
]
},
"impact": {
"cvss": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
}
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "CWE-639: Authorization Bypass Through User-Controlled Key"
}
]
}
]
},
"references": {
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{
"name": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-jf9h-v24c-22g5",
"refsource": "CONFIRM",
"url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-jf9h-v24c-22g5"
},
{
"name": "https://hackerone.com/reports/1170024",
"refsource": "MISC",
"url": "https://hackerone.com/reports/1170024"
},
{
"name": "GLSA-202208-17",
"refsource": "GENTOO",
"url": "https://security.gentoo.org/glsa/202208-17"
}
]
},
"source": {
"advisory": "GHSA-jf9h-v24c-22g5",
"discovery": "UNKNOWN"
}
},
"nvd.nist.gov": {
"configurations": {
"CVE_data_version": "4.0",
"nodes": [
{
"children": [],
"cpe_match": [
{
"cpe23Uri": "cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:*",
"cpe_name": [],
"versionEndExcluding": "19.0.11",
"vulnerable": true
},
{
"cpe23Uri": "cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:*",
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"versionEndExcluding": "20.0.10",
"versionStartIncluding": "20.0.0",
"vulnerable": true
},
{
"cpe23Uri": "cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:*",
"cpe_name": [],
"versionEndExcluding": "21.0.2",
"versionStartIncluding": "21.0.0",
"vulnerable": true
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"operator": "OR"
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"ID": "CVE-2021-32654"
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"description": {
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{
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"value": "Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.11, 20.0.10, and 21.0.2, an attacker is able to receive write/read privileges on any Federated File Share. Since public links can be added as federated file share, this can also be exploited on any public link. Users can upgrade to patched versions (19.0.11, 20.0.10 or 21.0.2) or, as a workaround, disable federated file sharing."
}
]
},
"problemtype": {
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"value": "CWE-639"
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},
"references": {
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{
"name": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-jf9h-v24c-22g5",
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"url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-jf9h-v24c-22g5"
},
{
"name": "https://hackerone.com/reports/1170024",
"refsource": "MISC",
"tags": [
"Permissions Required",
"Third Party Advisory"
],
"url": "https://hackerone.com/reports/1170024"
},
{
"name": "GLSA-202208-17",
"refsource": "GENTOO",
"tags": [
"Third Party Advisory"
],
"url": "https://security.gentoo.org/glsa/202208-17"
}
]
}
},
"impact": {
"baseMetricV2": {
"acInsufInfo": false,
"cvssV2": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "NONE",
"baseScore": 6.4,
"confidentialityImpact": "PARTIAL",
"integrityImpact": "PARTIAL",
"vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:N",
"version": "2.0"
},
"exploitabilityScore": 10.0,
"impactScore": 4.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"severity": "MEDIUM",
"userInteractionRequired": false
},
"baseMetricV3": {
"cvssV3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 9.1,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 5.2
}
},
"lastModifiedDate": "2022-10-26T14:09Z",
"publishedDate": "2021-06-01T21:15Z"
}
}
}
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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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