CVE ID:	CVE-2021-32728
Description:	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.
Test IDs:	None available
Cross References:	Common Vulnerability Exposure (CVE) ID: CVE-2021-32728 https://github.com/nextcloud/security-advisories/security/advisories/GHSA-f5fr-5gcv-6cc5 Debian Security Information: DSA-4974 (Google Search) https://www.debian.org/security/2021/dsa-4974 https://github.com/nextcloud/desktop/pull/3338 https://github.com/nextcloud/desktop/pull/3338 https://hackerone.com/reports/1189162 https://hackerone.com/reports/1189162