MGASA-2021-0421

    Dashboard / Vulnerabilities / MGASA-2021-0421

    MGASA-2021-0421

    Published: 23 Sept 2021Last Modified: 16 Apr 2026

    Summary: Updated nextcloud-client packages fix security vulnerability

    Details: Nextcloud Desktop Client before 3.3.1 is vulnerable to improper certificate validation due to lack of SSL certificate verification when using the "Register with a Provider" flow. (CVE-2021-22895) 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

    References: https://advisories.mageia.org/MGASA-2021-0421.html, https://bugs.mageia.org/show_bug.cgi?id=29043, https://security-tracker.debian.org/tracker/source-package/nextcloud-desktop

    Affected packages

    Package

    Name: nextcloud-client

    Purl: pkg:rpm/mageia/nextcloud-client?arch=source&distro=mageia-8

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -3.3.3-1.mga8

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    MGASA-2021-0421 | CVE-DB