Debian LTS: DLA-1762-1: systemd security update

    Date24 Apr 2019
    Posted ByLinuxSecurity Advisories
    Two vulnerabilities have been addressed in the systemd components systemd-tmpfiles and
    Package        : systemd
    Version        : 215-17+deb8u12
    CVE ID         : CVE-2017-18078 CVE-2019-3842
    Two vulnerabilities have been addressed in the systemd components
    systemd-tmpfiles and
        systemd-tmpfiles in systemd attempted to support ownership/permission
        changes on hardlinked files even if the fs.protected_hardlinks sysctl
        is turned off, which allowed local users to bypass intended access
        restrictions via vectors involving a hard link to a file for which
        the user lacked write access.
        It was discovered that pam_systemd did not properly sanitize the
        environment before using the XDG_SEAT variable. It was possible for
        an attacker, in some particular configurations, to set a XDG_SEAT
        environment variable which allowed for commands to be checked against
        polkit policies using the "allow_active" element rather than
    For Debian 8 "Jessie", these problems have been fixed in version
    We recommend that you upgrade your systemd packages.
    Further information about Debian LTS security advisories, how to apply
    these updates to your system and frequently asked questions can be
    found at:
    mike gabriel aka sunweaver (Debian Developer)
    fon: +49 (1520) 1976 148
    GnuPG Fingerprint: 9BFB AEE8 6C0A A5FF BF22  0782 9AF4 6B30 2577 1B31
    mail: This email address is being protected from spambots. You need JavaScript enabled to view it.,

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