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vuln-cve/data/2021/32xxx/CVE-2021-32728.json
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{
"containers": {
"cna": {
"affected": [
{
"product": "security-advisories",
"vendor": "nextcloud",
"versions": [
{
"status": "affected",
"version": "< 3.3.0"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server with a computer. Clients using the Nextcloud end-to-end encryption feature download the public and private key via an API endpoint. In versions prior to 3.3.0, the Nextcloud Desktop client fails to check if a private key belongs to previously downloaded public certificate. If the Nextcloud instance serves a malicious public key, the data would be encrypted for this key and thus could be accessible to a malicious actor. This issue is fixed in Nextcloud Desktop Client version 3.3.0. There are no known workarounds aside from upgrading."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-295",
"description": "CWE-295: Improper Certificate Validation",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2021-09-19T23:06:11.000Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"tags": [
"x_refsource_MISC"
],
"url": "https://hackerone.com/reports/1189162"
},
{
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-f5fr-5gcv-6cc5"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/nextcloud/desktop/pull/3338"
},
{
"name": "DSA-4974",
"tags": [
"vendor-advisory",
"x_refsource_DEBIAN"
],
"url": "https://www.debian.org/security/2021/dsa-4974"
}
],
"source": {
"advisory": "GHSA-f5fr-5gcv-6cc5",
"discovery": "UNKNOWN"
},
"title": "End-to-end encryption device setup did not verify public key",
"x_legacyV4Record": {
"CVE_data_meta": {
"ASSIGNER": "security-advisories@github.com",
"ID": "CVE-2021-32728",
"STATE": "PUBLIC",
"TITLE": "End-to-end encryption device setup did not verify public key"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "security-advisories",
"version": {
"version_data": [
{
"version_value": "< 3.3.0"
}
]
}
}
]
},
"vendor_name": "nextcloud"
}
]
}
},
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server with a computer. Clients using the Nextcloud end-to-end encryption feature download the public and private key via an API endpoint. In versions prior to 3.3.0, the Nextcloud Desktop client fails to check if a private key belongs to previously downloaded public certificate. If the Nextcloud instance serves a malicious public key, the data would be encrypted for this key and thus could be accessible to a malicious actor. This issue is fixed in Nextcloud Desktop Client version 3.3.0. There are no known workarounds aside from upgrading."
}
]
},
"impact": {
"cvss": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
}
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "CWE-295: Improper Certificate Validation"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://hackerone.com/reports/1189162",
"refsource": "MISC",
"url": "https://hackerone.com/reports/1189162"
},
{
"name": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-f5fr-5gcv-6cc5",
"refsource": "CONFIRM",
"url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-f5fr-5gcv-6cc5"
},
{
"name": "https://github.com/nextcloud/desktop/pull/3338",
"refsource": "MISC",
"url": "https://github.com/nextcloud/desktop/pull/3338"
},
{
"name": "DSA-4974",
"refsource": "DEBIAN",
"url": "https://www.debian.org/security/2021/dsa-4974"
}
]
},
"source": {
"advisory": "GHSA-f5fr-5gcv-6cc5",
"discovery": "UNKNOWN"
}
}
},
"adp": [
{
"providerMetadata": {
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE",
"dateUpdated": "2024-08-03T23:33:54.918Z"
},
"title": "CVE Program Container",
"references": [
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://hackerone.com/reports/1189162"
},
{
"tags": [
"x_refsource_CONFIRM",
"x_transferred"
],
"url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-f5fr-5gcv-6cc5"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://github.com/nextcloud/desktop/pull/3338"
},
{
"name": "DSA-4974",
"tags": [
"vendor-advisory",
"x_refsource_DEBIAN",
"x_transferred"
],
"url": "https://www.debian.org/security/2021/dsa-4974"
}
]
}
]
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2021-32728",
"datePublished": "2021-08-18T16:00:13.000Z",
"dateReserved": "2021-05-12T00:00:00.000Z",
"dateUpdated": "2024-08-03T23:33:54.918Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
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