UBUNTU-CVE-2021-38155

    Dashboard / Vulnerabilities / UBUNTU-CVE-2021-38155

    UBUNTU-CVE-2021-38155

    Published: 6 Aug 2021Last Modified: 12 Feb 2026
    Upstream:
    CVE-2021-38155

    Summary:

    Details: OpenStack Keystone 10.x through 16.x before 16.0.2, 17.x before 17.0.1, 18.x before 18.0.1, and 19.x before 19.0.1 allows information disclosure during account locking (related to PCI DSS features). By guessing the name of an account and failing to authenticate multiple times, any unauthenticated actor could both confirm the account exists and obtain that account's corresponding UUID, which might be leveraged for other unrelated attacks. All deployments enabling security_compliance.lockout_failure_attempts are affected.

    References: https://ubuntu.com/security/CVE-2021-38155, https://www.cve.org/CVERecord?id=CVE-2021-38155

    Affected packages

    Package

    Name: keystone

    Purl: pkg:deb/ubuntu/keystone@2:9.3.0-0ubuntu3.2?arch=source&distro=xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    2:8.0.0-0ubuntu1

    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-2021-38155 | CVE-DB