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.
Configurations

Configuration 1 (hide)

cpe:2.3:a:nextcloud:desktop:*:*:*:*:*:*:*:*

Configuration 2 (hide)

OR cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*

History

21 Nov 2024, 06:07

Type Values Removed Values Added
References () https://github.com/nextcloud/desktop/pull/3338 - Patch, Third Party Advisory () https://github.com/nextcloud/desktop/pull/3338 - Patch, Third Party Advisory
References () https://github.com/nextcloud/security-advisories/security/advisories/GHSA-f5fr-5gcv-6cc5 - Exploit, Third Party Advisory () https://github.com/nextcloud/security-advisories/security/advisories/GHSA-f5fr-5gcv-6cc5 - Exploit, Third Party Advisory
References () https://hackerone.com/reports/1189162 - Exploit, Third Party Advisory () https://hackerone.com/reports/1189162 - Exploit, Third Party Advisory
References () https://www.debian.org/security/2021/dsa-4974 - Third Party Advisory () https://www.debian.org/security/2021/dsa-4974 - Third Party Advisory

Information

Published : 2021-08-18 16:15

Updated : 2024-11-21 06:07


NVD link : CVE-2021-32728

Mitre link : CVE-2021-32728

CVE.ORG link : CVE-2021-32728


JSON object : View

Products Affected

debian

  • debian_linux

nextcloud

  • desktop
CWE
CWE-295

Improper Certificate Validation