CVE-2023-28999

Nextcloud is an open-source productivity platform. In Nextcloud Desktop client 3.0.0 until 3.8.0, Nextcloud Android app 3.13.0 until 3.25.0, and Nextcloud iOS app 3.0.5 until 4.8.0, a malicious server administrator can gain full access to an end-to-end encrypted folder. They can decrypt files, recover the folder structure and add new files. This issue is fixed in Nextcloud Desktop 3.8.0, Nextcloud Android 3.25.0, and Nextcloud iOS 4.8.0. No known workarounds are available.

CVSS v3 6.9 MEDIUM

6.9^/10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 0.4 / Impact : 6.0

Attack Vector PHYSICAL

Attack Complexity LOW

Privileges Required HIGH

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact LOW

Scope CHANGED

References

Link	Resource
https://ethz.ch/content/dam/ethz/special-interest/infk/inst-infsec/appliedcrypto/education/theses/report_DanieleCoppola.pdf	Exploit Technical Description Third Party Advisory
https://github.com/nextcloud/desktop/pull/5560	Patch Vendor Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-8875-wxww-3rr8	Vendor Advisory
https://ethz.ch/content/dam/ethz/special-interest/infk/inst-infsec/appliedcrypto/education/theses/report_DanieleCoppola.pdf	Exploit Technical Description Third Party Advisory
https://github.com/nextcloud/desktop/pull/5560	Patch Vendor Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-8875-wxww-3rr8	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:nextcloud:desktop::::::::
	cpe:2.3:a:nextcloud:nextcloud:::::iphone_os:::*
	cpe:2.3:a:nextcloud:nextcloud:::::android:::*

History

21 Nov 2024, 07:56

Type	Values Removed	Values Added
New CVE

Information

Published : 2023-04-04 13:15

Updated : 2024-11-21 07:56

NVD link : CVE-2023-28999

Mitre link : CVE-2023-28999

CVE.ORG link : CVE-2023-28999

JSON object : View

Products Affected

nextcloud

nextcloud
desktop

CWE

CWE-325

Missing Cryptographic Step

CWE-311

Missing Encryption of Sensitive Data

{"id": "CVE-2023-28999", "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 6.9, "attackVector": "PHYSICAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:P/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:L", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "HIGH", "confidentialityImpact": "HIGH"}, "impactScore": 6.0, "exploitabilityScore": 0.4}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.4, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:L", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "HIGH", "confidentialityImpact": "HIGH"}, "impactScore": 5.5, "exploitabilityScore": 0.9}]}, "published": "2023-04-04T13:15:09.003", "references": [{"url": "https://ethz.ch/content/dam/ethz/special-interest/infk/inst-infsec/appliedcrypto/education/theses/report_DanieleCoppola.pdf", "tags": ["Exploit", "Technical Description", "Third Party Advisory"], "source": "security-advisories@github.com"}, {"url": "https://github.com/nextcloud/desktop/pull/5560", "tags": ["Patch", "Vendor Advisory"], "source": "security-advisories@github.com"}, {"url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-8875-wxww-3rr8", "tags": ["Vendor Advisory"], "source": "security-advisories@github.com"}, {"url": "https://ethz.ch/content/dam/ethz/special-interest/infk/inst-infsec/appliedcrypto/education/theses/report_DanieleCoppola.pdf", "tags": ["Exploit", "Technical Description", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://github.com/nextcloud/desktop/pull/5560", "tags": ["Patch", "Vendor Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-8875-wxww-3rr8", "tags": ["Vendor Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-325"}]}, {"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-311"}]}], "descriptions": [{"lang": "en", "value": "Nextcloud is an open-source productivity platform. In Nextcloud Desktop client 3.0.0 until 3.8.0, Nextcloud Android app 3.13.0 until 3.25.0, and Nextcloud iOS app 3.0.5 until 4.8.0, a malicious server administrator can gain full access to an end-to-end encrypted folder. They can decrypt files, recover the folder structure and add new files.\u200b This issue is fixed in Nextcloud Desktop 3.8.0, Nextcloud Android 3.25.0, and Nextcloud iOS 4.8.0. No known workarounds are available."}], "lastModified": "2024-11-21T07:56:22.090", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:nextcloud:desktop:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F4EEF1B4-66BE-4127-A87F-E92ACCF8897D", "versionEndExcluding": "3.8.0", "versionStartIncluding": "3.0.0"}, {"criteria": "cpe:2.3:a:nextcloud:nextcloud:*:*:*:*:iphone_os:*:*:*", "vulnerable": true, "matchCriteriaId": "CAC80EF2-7FAF-4730-938F-3F5D3C137F24", "versionEndExcluding": "4.8.0", "versionStartIncluding": "3.0.5"}, {"criteria": "cpe:2.3:a:nextcloud:nextcloud:*:*:*:*:android:*:*:*", "vulnerable": true, "matchCriteriaId": "012EE253-E69E-406B-8B84-D04F13940620", "versionEndExcluding": "3.25.0", "versionStartIncluding": "3.13.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}

6.9 /10