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.
References
Link | Resource |
---|---|
https://github.com/nextcloud/desktop/pull/3338 | Patch Third Party Advisory |
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-f5fr-5gcv-6cc5 | Exploit Third Party Advisory |
https://hackerone.com/reports/1189162 | Exploit Third Party Advisory |
https://www.debian.org/security/2021/dsa-4974 | Third Party Advisory |
Configurations
History
No history.
Information
Published : 2021-08-18 16:15
Updated : 2024-02-28 18:28
NVD link : CVE-2021-32728
Mitre link : CVE-2021-32728
CVE.ORG link : CVE-2021-32728
JSON object : View
Products Affected
nextcloud
- desktop
debian
- debian_linux
CWE
CWE-295
Improper Certificate Validation