UBUNTU-CVE-2019-12209

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    UBUNTU-CVE-2019-12209

    Published: 4 Jun 2019Last Modified: 8 Sept 2025
    Upstream:
    CVE-2019-12209

    Summary:

    Details: Yubico pam-u2f 1.0.7 attempts parsing of the configured authfile (default $HOME/.config/Yubico/u2f_keys) as root (unless openasuser was enabled), and does not properly verify that the path lacks symlinks pointing to other files on the system owned by root. If the debug option is enabled in the PAM configuration, part of the file contents of a symlink target will be logged, possibly revealing sensitive information.

    References: https://ubuntu.com/security/CVE-2019-12209, https://www.openwall.com/lists/oss-security/2019/06/05/1, https://developers.yubico.com/pam-u2f/Release_Notes.html, https://www.cve.org/CVERecord?id=CVE-2019-12209

    Affected packages

    Package

    Name: pam-u2f

    Purl: pkg:deb/ubuntu/[email protected]?arch=source&distro=esm-apps/xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    1.0.1-1
    1.0.2-1
    1.0.3-1

    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