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   http://www.squid-cache.org/Advisories/SQUID-2018_1.txt

    Due to incorrect pointer handling Squid is vulnerable to denial
    of service attack when processing ESI responses.

    This problem allows a remote server delivering certain ESI
    response syntax to trigger a denial of service for all clients
    accessing the Squid service.

   http://www.squid-cache.org/Advisories/SQUID-2018_2.txt

    Due to incorrect pointer handling Squid is vulnerable to denial
    of service attack when processing ESI responses or downloading
    intermediate CA certificates.

    This problem allows a remote client delivering certain HTTP
    requests in conjunction with certain trusted server responses to
    trigger a denial of service for all clients accessing the Squid
    service.

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