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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2021-32728 Detail

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 3.x Severity and Vector Strings:

NIST CVSS score matches with CNA score
CNA:  GitHub, Inc.
Base Score:  6.5 MEDIUM
Vector:  CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://github.com/nextcloud/desktop/pull/3338 Patch  Third Party Advisory 
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://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://hackerone.com/reports/1189162 Exploit  Third Party Advisory 
https://www.debian.org/security/2021/dsa-4974 Third Party Advisory 
https://www.debian.org/security/2021/dsa-4974 Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-295 Improper Certificate Validation GitHub, Inc.  

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:a:nextcloud:desktop:*:*:*:*:*:*:*:*
   Show Matching CPE(s) 		Up to (excluding)
3.3.0

Configuration 2 ( hide )
 cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
   Show Matching CPE(s)
 cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
   Show Matching CPE(s)

Denotes Vulnerable Software
Are we missing a CPE here? Please let us know.

Change History

7 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2021-32728
NVD Published Date:
08/18/2021
NVD Last Modified:
11/21/2024
Source:
GitHub, Inc.