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

    Date24 Apr 2019
    CategoryDebian LTS
    293
    Posted ByLinuxSecurity Advisories
    Two vulnerabilities have been addressed in the systemd components systemd-tmpfiles and pam_systemd.so.
    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 pam_systemd.so.
    
    CVE-2017-18078
    
        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.
    
    CVE-2019-3842
    
        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
        "allow_any".
    
    For Debian 8 "Jessie", these problems have been fixed in version
    215-17+deb8u12.
    
    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: https://wiki.debian.org/LTS
    
    -- 
    
    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., http://sunweavers.net
    
    
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