UBUNTU-CVE-2021-27927

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    UBUNTU-CVE-2021-27927

    Published: 3 Mar 2021Last Modified: 8 Sept 2025
    Upstream:
    CVE-2021-27927

    Summary:

    Details: In Zabbix from 4.0.x before 4.0.28rc1, 5.0.0alpha1 before 5.0.10rc1, 5.2.x before 5.2.6rc1, and 5.4.0alpha1 before 5.4.0beta2, the CControllerAuthenticationUpdate controller lacks a CSRF protection mechanism. The code inside this controller calls diableSIDValidation inside the init() method. An attacker doesn't have to know Zabbix user login credentials, but has to know the correct Zabbix URL and contact information of an existing user with sufficient privileges.

    References: https://ubuntu.com/security/CVE-2021-27927, https://support.zabbix.com/browse/ZBX-18942, https://www.cve.org/CVERecord?id=CVE-2021-27927

    Affected packages

    Package

    Name: zabbix

    Purl: pkg:deb/ubuntu/zabbix@1:4.0.17+dfsg-1ubuntu0.1~esm2?arch=source&distro=esm-apps/focal

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    1:4.0.4+dfsg-1build2
    1:4.0.4+dfsg-1build3
    1:4.0.11+dfsg-1
    1:4.0.14+dfsg-1
    1:4.0.15+dfsg-1
    1:4.0.16+dfsg-1
    1:4.0.16+dfsg-1build1
    1:4.0.17+dfsg-1
    1:4.0.17+dfsg-1ubuntu0.1~esm1
    1:4.0.17+dfsg-1ubuntu0.1~esm2

    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
    UBUNTU-CVE-2021-27927 | CVE-DB