ArchLinux: 201908-4: exim: arbitrary code execution

    Date07 Aug 2019
    CategoryArchLinux
    352
    Posted ByLinuxSecurity Advisories
    The package exim before version 4.92.1-1 is vulnerable to arbitrary code execution.
    Arch Linux Security Advisory ASA-201908-4
    =========================================
    
    Severity: Critical
    Date    : 2019-08-05
    CVE-ID  : CVE-2019-13917
    Package : exim
    Type    : arbitrary code execution
    Remote  : Yes
    Link    : https://security.archlinux.org/AVG-1011
    
    Summary
    =======
    
    The package exim before version 4.92.1-1 is vulnerable to arbitrary
    code execution.
    
    Resolution
    ==========
    
    Upgrade to 4.92.1-1.
    
    # pacman -Syu "exim>=4.92.1-1"
    
    The problem has been fixed upstream in version 4.92.1.
    
    Workaround
    ==========
    
    None.
    
    Description
    ===========
    
    Exim 4.85 through 4.92 (fixed in 4.92.1) allows remote code execution
    as root in some unusual configurations that use the ${sort } expansion
    for items that can be controlled by an attacker (e.g., $local_part or
    $domain).
    
    Impact
    ======
    
    A remote attacker can, in some unusual configurations, execute
    arbitrary code via a crafted e-mail.
    
    References
    ==========
    
    https://seclists.org/oss-sec/2019/q3/63
    https://lists.exim.org/lurker/message/20190725.090419.d506f736.en.html
    https://security.archlinux.org/CVE-2019-13917
    
    
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