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    CVE-2019-12209

    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.

    Published:Jun 4, 2019
    Last Modified:Nov 21, 2024
    EPS:Jun 4, 2019
    EPSS Score:0.00629
    CVSS Score:7.5

    Affected Products

    Vendor
    Yubico
    Product
    Pam-u2f

    Exploits

    http://www.openwall.com/lists/oss-security/2019/06/05/1http://www.openwall.com/lists/oss-security/2019/06/05/1

    References

    http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00012.html
    http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00018.html
    http://www.openwall.com/lists/oss-security/2019/06/05/1
    https://developers.yubico.com/pam-u2f/Release_Notes.html
    https://github.com/Yubico/pam-u2f/commit/7db3386fcdb454e33a3ea30dcfb8e8960d4c3aa3
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5FOR4ADC356JPCHAJI5UXZORLC3VNBPS/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZCGU6UQLI3ZTW3UYCTMQW7VDL5M4LCWR/
    http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00012.html
    http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00018.html
    http://www.openwall.com/lists/oss-security/2019/06/05/1
    https://developers.yubico.com/pam-u2f/Release_Notes.html
    https://github.com/Yubico/pam-u2f/commit/7db3386fcdb454e33a3ea30dcfb8e8960d4c3aa3
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5FOR4ADC356JPCHAJI5UXZORLC3VNBPS/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZCGU6UQLI3ZTW3UYCTMQW7VDL5M4LCWR/

    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