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    ArchLinux: 202010-8: kpmcore: privilege escalation

    Date 21 Oct 2020
    134
    Posted By LinuxSecurity Advisories
    The package kpmcore before version 4.2.0-1 is vulnerable to privilege escalation.
    Arch Linux Security Advisory ASA-202010-8
    =========================================
    
    Severity: High
    Date    : 2020-10-18
    CVE-ID  : CVE-2020-27187
    Package : kpmcore
    Type    : privilege escalation
    Remote  : No
    Link    : https://security.archlinux.org/AVG-1253
    
    Summary
    =======
    
    The package kpmcore before version 4.2.0-1 is vulnerable to privilege
    escalation.
    
    Resolution
    ==========
    
    Upgrade to 4.2.0-1.
    
    # pacman -Syu "kpmcore>=4.2.0-1"
    
    The problem has been fixed upstream in version 4.2.0.
    
    Workaround
    ==========
    
    None.
    
    Description
    ===========
    
    kpmcore_externalcommand helper contains a logic flaw in which the
    service invoking dbus is not properly checked. An attacker on your
    local machine can replace /etc/fstab, execute mount and other
    partitioning related commands while KDE Partition Manager is running.
    mount command can then be used to gain full root privileges.
    
    Impact
    ======
    
    A local attacker is able to escalate privileges, modify the filesystem
    and launch partition commands on the host while the program is running.
    
    References
    ==========
    
    https://kde.org/info/security/advisory-20201017-1.txt
    https://invent.kde.org/system/kpmcore/-/commit/c466c5db11b5cee546d1ec0594c2f1105a354fed
    https://invent.kde.org/system/kpmcore/-/commit/7ec4b611dcf822439b081613cca4184689266454
    https://security.archlinux.org/CVE-2020-27187
    

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