Debian: DSA-4134-1: util-linux security update

    Date10 Mar 2018
    CategoryDebian
    5072
    Posted ByAnthony Pell
    Bjorn Bosselmann discovered that the umount bash completion from util-linux does not properly handle embedded shell commands in a mountpoint name. An attacker with rights to mount filesystems can take advantage of this flaw for privilege escalation if a user (in particular
    
    - -------------------------------------------------------------------------
    Debian Security Advisory DSA-4134-1                   This email address is being protected from spambots. You need JavaScript enabled to view it.
    https://www.debian.org/security/                     Salvatore Bonaccorso
    March 10, 2018                        https://www.debian.org/security/faq
    - -------------------------------------------------------------------------
    
    Package        : util-linux
    CVE ID         : CVE-2018-7738
    Debian Bug     : 892179
    
    Bjorn Bosselmann discovered that the umount bash completion from
    util-linux does not properly handle embedded shell commands in a
    mountpoint name. An attacker with rights to mount filesystems can take
    advantage of this flaw for privilege escalation if a user (in particular
    root) is tricked into using the umount completion while a specially
    crafted mount is present.
    
    For the stable distribution (stretch), this problem has been fixed in
    version 2.29.2-1+deb9u1.
    
    We recommend that you upgrade your util-linux packages.
    
    For the detailed security status of util-linux please refer to its
    security tracker page at:
    https://security-tracker.debian.org/tracker/util-linux
    
    Further information about Debian Security Advisories, how to apply
    these updates to your system and frequently asked questions can be
    found at: https://www.debian.org/security/
    
    Mailing list: This email address is being protected from spambots. You need JavaScript enabled to view it.
    
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