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    ArchLinux: 201902-7: libu2f-host: arbitrary code execution

    Date12 Feb 2019
    CategoryArchLinux
    205
    Posted ByLinuxSecurity Advisories
    The package libu2f-host before version 1.1.7-1 is vulnerable to arbitrary code execution.
    Arch Linux Security Advisory ASA-201902-7
    =========================================
    
    Severity: High
    Date    : 2019-02-11
    CVE-ID  : CVE-2018-20340
    Package : libu2f-host
    Type    : arbitrary code execution
    Remote  : No
    Link    : https://security.archlinux.org/AVG-884
    
    Summary
    =======
    
    The package libu2f-host before version 1.1.7-1 is vulnerable to
    arbitrary code execution.
    
    Resolution
    ==========
    
    Upgrade to 1.1.7-1.
    
    # pacman -Syu "libu2f-host>=1.1.7-1"
    
    The problem has been fixed upstream in version 1.1.7.
    
    Workaround
    ==========
    
    None.
    
    Description
    ===========
    
    Yubico library libu2f-host prior to version 1.1.7 contains an unchecked
    buffer, which could allow a buffer overflow. Libu2f-host is a library
    that implements the host party of the U2F protocol. This issue can
    allow an attacker with a custom made malicious USB device masquerading
    as a security key, and physical access to a computer where PAM U2F or
    an application with libu2f-host integrated, to potentially execute
    arbitrary code on that computer. Users of the YubiKey PAM U2F Tool are
    the most impacted since the arbitrary code could execute with elevated
    privileges.
    
    Impact
    ======
    
    A malicious USB device can execute arbitrary code on the host.
    
    References
    ==========
    
    https://www.yubico.com/support/security-advisories/ysa-2019-01/
    https://security.archlinux.org/CVE-2018-20340
    
    

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