Critical TLS flaw opens Exim servers to remote compromise

    Date10 Sep 2019
    1409
    Posted ByBrittany Day

    A ‘critical’ security vulnerability has been discovered in the Exim mail server that requires admins’ urgent attention. Learn more about the flaw and how to protect your servers:

    Affecting all versions from 4.80 up to and including 4.92.1, Exim’s maintainers have offered a general description of the flaw (CVE-2019-15846) discovered in July 2019 by a researcher identified as ‘Zerons’.

    Subsequently confirmed by engineers working for Qualys, the flaw is a buffer overflow in the part of the TLS negotiation connected to Server Name Indication (SNI). SNI is a way web hosts present the certificates for multiple HTTPS-secured TLS servers sitting behind the same IP address so that incoming connections are directed to the correct one.

    LinuxSecurity Poll

    What do you think of the articles on LinuxSecurity?

    No answer selected. Please try again.
    Please select either existing option or enter your own, however not both.
    Please select minimum 0 answer(s) and maximum 3 answer(s).
    /main-polls/24-what-do-you-think-of-the-quality-of-the-articles-on-linuxsecurity?task=poll.vote&format=json
    24
    radio
    [{"id":"87","title":"Excellent, don't change a thing!","votes":"15","type":"x","order":"1","pct":53.57,"resources":[]},{"id":"88","title":"Should be more technical","votes":"4","type":"x","order":"2","pct":14.29,"resources":[]},{"id":"89","title":"Should include more HOWTOs","votes":"9","type":"x","order":"3","pct":32.14,"resources":[]}]["#ff5b00","#4ac0f2","#b80028","#eef66c","#60bb22","#b96a9a","#62c2cc"]["rgba(255,91,0,0.7)","rgba(74,192,242,0.7)","rgba(184,0,40,0.7)","rgba(238,246,108,0.7)","rgba(96,187,34,0.7)","rgba(185,106,154,0.7)","rgba(98,194,204,0.7)"]350
    bottom200

    We use cookies to provide and improve our services. By using our site, you consent to our Cookie Policy.