VDB
CVE-2021-32728
CVE-2021-32728
PUBLISHED
CVSS 6.5 MEDIUM
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.
EPSS 0.85% · 56.8th percentile
Risk Scores
CVSS 3.1
6.5
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
EPSS Score
0.85%
56.8th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:22.04:LTS | nextcloud-desktop | 0, 3.3.5-1, 3.4.2-1ubuntu1 |
| Ubuntu:20.04:LTS | nextcloud-desktop | 0, 2.6.2-1build1, 2.5.3-1 |
Timeline
- Aug 18, 2021 CVE Published
- Aug 19, 2021 EPSS Score
- Oct 17, 2021 EPSS Score
- Dec 15, 2021 EPSS Score
- Feb 4, 2022 EPSS Score
- Feb 12, 2022 EPSS Score
- Apr 1, 2022 EPSS Score
- Apr 12, 2022 EPSS Score
- Jun 10, 2022 EPSS Score
- Aug 9, 2022 EPSS Score
- Dec 5, 2022 EPSS Score
- Feb 2, 2023 EPSS Score
References
- https://ubuntu.com/security/CVE-2021-32728 third-party-advisory
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-f5fr-5gcv-6cc5 third-party-advisory
- https://github.com/nextcloud/desktop/pull/3338 third-party-advisory
- https://hackerone.com/reports/1189162 third-party-advisory
- https://www.cve.org/CVERecord?id=CVE-2021-32728 third-party-advisory