ArchLinux: 201910-6: unbound: denial of service

    Date11 Oct 2019
    CategoryArchLinux
    171
    Posted ByLinuxSecurity Advisories
    Archlinux Large
    The package unbound before version 1.9.4-1 is vulnerable to denial of service.
    Arch Linux Security Advisory ASA-201910-6
    =========================================
    
    Severity: High
    Date    : 2019-10-11
    CVE-ID  : CVE-2019-16866
    Package : unbound
    Type    : denial of service
    Remote  : Yes
    Link    : https://security.archlinux.org/AVG-1042
    
    Summary
    =======
    
    The package unbound before version 1.9.4-1 is vulnerable to denial of
    service.
    
    Resolution
    ==========
    
    Upgrade to 1.9.4-1.
    
    # pacman -Syu "unbound>=1.9.4-1"
    
    The problem has been fixed upstream in version 1.9.4.
    
    Workaround
    ==========
    
    None.
    
    Description
    ===========
    
    Due to an error in parsing NOTIFY queries, it is possible for Unbound
    from 1.7.1 up to and including 1.9.3 to continue processing malformed
    queries and may ultimately result in a pointer dereference in
    uninitialized memory. This results in a crash of the Unbound daemon.
    
    Impact
    ======
    
    A remote attacker might be able to crash the Unbound server via crafted
    NOTIFY queries.
    
    References
    ==========
    
    https://www.nlnetlabs.nl/downloads/unbound/CVE-2019-16866.txt
    https://github.com/NLnetLabs/unbound/commit/b60c4a472c856f0a98120b7259e991b3a6507eb5
    https://security.archlinux.org/CVE-2019-16866
    
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