CVE-2021-32728

 

Published at: - 18-08-2021 06:15

Last modified: - 27-09-2022 05:44

Total changes: - 6

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.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

 

Verification logic

 

Reference

• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-f5fr-5gcv-6cc5
• https://github.com/nextcloud/desktop/pull/3338
• https://hackerone.com/reports/1189162
• DSA-4974-Third Party Advisory

 

Keywords

NVD

 

CVE-2021-32728

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures