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    ArchLinux: 202011-18: c-ares: denial of service

    Date 29 Nov 2020
    396
    Posted By LinuxSecurity Advisories
    The package c-ares before version 1.17.1-1 is vulnerable to denial of service.
    Arch Linux Security Advisory ASA-202011-18
    ==========================================
    
    Severity: Medium
    Date    : 2020-11-19
    CVE-ID  : CVE-2020-8277
    Package : c-ares
    Type    : denial of service
    Remote  : Yes
    Link    : https://security.archlinux.org/AVG-1280
    
    Summary
    =======
    
    The package c-ares before version 1.17.1-1 is vulnerable to denial of
    service.
    
    Resolution
    ==========
    
    Upgrade to 1.17.1-1.
    
    # pacman -Syu "c-ares>=1.17.1-1"
    
    The problem has been fixed upstream in version 1.17.1.
    
    Workaround
    ==========
    
    None.
    
    Description
    ===========
    
    An application that allows an attacker to trigger a DNS request for a
    host of their choice could trigger a Denial of Service by getting the
    application to resolve a DNS record with a large number of responses.
    
    Impact
    ======
    
    A remote malicious attacker might be able to crash the application with
    a crafted DNS response.
    
    References
    ==========
    
    https://github.com/c-ares/c-ares/issues/371
    https://github.com/c-ares/c-ares/commit/0d252eb3b2147179296a3bdb4ef97883c97c54d3
    https://security.archlinux.org/CVE-2020-8277
    

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