Vulnerability Details CVE-2021-32728
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 43.5%
CVSS Severity
CVSS v3 Score 6.5
CVSS v2 Score 4.0
References
- https://github.com/nextcloud/desktop/pull/3338
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-f5fr-5gcv-6cc5
- https://hackerone.com/reports/1189162
- https://www.debian.org/security/2021/dsa-4974
- https://github.com/nextcloud/desktop/pull/3338
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-f5fr-5gcv-6cc5
- https://hackerone.com/reports/1189162
- https://www.debian.org/security/2021/dsa-4974
Products affected by CVE-2021-32728
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cpe:2.3:a:nextcloud:desktop:-
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cpe:2.3:a:nextcloud:desktop:0.0.2
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cpe:2.3:a:nextcloud:desktop:1.1.0
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cpe:2.3:a:nextcloud:desktop:1.1.2
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cpe:2.3:a:nextcloud:desktop:1.2.0
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cpe:2.3:a:nextcloud:desktop:1.2.1
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cpe:2.3:a:nextcloud:desktop:1.2.2
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cpe:2.3:a:nextcloud:desktop:1.2.3
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cpe:2.3:a:nextcloud:desktop:1.2.4
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cpe:2.3:a:nextcloud:desktop:1.2.5
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cpe:2.3:a:nextcloud:desktop:1.3.0
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cpe:2.3:a:nextcloud:desktop:1.4.0
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cpe:2.3:a:nextcloud:desktop:1.4.1
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cpe:2.3:a:nextcloud:desktop:1.4.2
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cpe:2.3:a:nextcloud:desktop:1.5.0
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cpe:2.3:a:nextcloud:desktop:1.5.1
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cpe:2.3:a:nextcloud:desktop:1.5.2
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cpe:2.3:a:nextcloud:desktop:1.5.3
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cpe:2.3:a:nextcloud:desktop:1.6.0
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cpe:2.3:a:nextcloud:desktop:1.6.1
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cpe:2.3:a:nextcloud:desktop:1.6.2
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cpe:2.3:a:nextcloud:desktop:1.6.3
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cpe:2.3:a:nextcloud:desktop:1.6.4
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cpe:2.3:a:nextcloud:desktop:1.7.0
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cpe:2.3:a:nextcloud:desktop:1.7.1
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cpe:2.3:a:nextcloud:desktop:1.8.0
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cpe:2.3:a:nextcloud:desktop:1.8.1
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cpe:2.3:a:nextcloud:desktop:1.8.2
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cpe:2.3:a:nextcloud:desktop:1.8.3
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cpe:2.3:a:nextcloud:desktop:2.0.0
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cpe:2.3:a:nextcloud:desktop:2.0.1
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cpe:2.3:a:nextcloud:desktop:2.0.2
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cpe:2.3:a:nextcloud:desktop:2.1.0
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cpe:2.3:a:nextcloud:desktop:2.2.3
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cpe:2.3:a:nextcloud:desktop:2.2.4
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cpe:2.3:a:nextcloud:desktop:2.3.0
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cpe:2.3:a:nextcloud:desktop:2.3.1
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cpe:2.3:a:nextcloud:desktop:2.3.2
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cpe:2.3:a:nextcloud:desktop:2.3.3
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cpe:2.3:a:nextcloud:desktop:2.3.4
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cpe:2.3:a:nextcloud:desktop:2.4.0
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cpe:2.3:a:nextcloud:desktop:2.4.1
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cpe:2.3:a:nextcloud:desktop:2.4.2
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cpe:2.3:a:nextcloud:desktop:2.4.3
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cpe:2.3:a:nextcloud:desktop:2.5.0
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cpe:2.3:a:nextcloud:desktop:2.5.1
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cpe:2.3:a:nextcloud:desktop:2.5.2
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cpe:2.3:a:nextcloud:desktop:2.5.3
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cpe:2.3:a:nextcloud:desktop:2.6.0
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cpe:2.3:a:nextcloud:desktop:2.6.1
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cpe:2.3:a:nextcloud:desktop:2.6.2
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cpe:2.3:a:nextcloud:desktop:2.6.3
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cpe:2.3:a:nextcloud:desktop:2.6.4
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cpe:2.3:a:nextcloud:desktop:2.6.5
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cpe:2.3:a:nextcloud:desktop:2.7.0
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cpe:2.3:a:nextcloud:desktop:3.0.0
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cpe:2.3:a:nextcloud:desktop:3.0.1
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cpe:2.3:a:nextcloud:desktop:3.0.2
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cpe:2.3:a:nextcloud:desktop:3.0.3
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cpe:2.3:a:nextcloud:desktop:3.1.0
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cpe:2.3:a:nextcloud:desktop:3.1.1
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cpe:2.3:a:nextcloud:desktop:3.1.2
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cpe:2.3:a:nextcloud:desktop:3.1.3
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cpe:2.3:a:nextcloud:desktop:3.2.0
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cpe:2.3:a:nextcloud:desktop:3.2.1
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cpe:2.3:a:nextcloud:desktop:3.2.2
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cpe:2.3:o:debian:debian_linux:10.0
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cpe:2.3:o:debian:debian_linux:11.0