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Groups > linux.debian.security > #4968

Re: DSA for CVE-2016-5696 (off-path blind TCP session attack)

From Jakub Wilk <jwilk@debian.org>
Newsgroups linux.debian.security
Subject Re: DSA for CVE-2016-5696 (off-path blind TCP session attack)
Date 2016-08-12 17:50 +0200
Message-ID <s5mSC-3vM-11@gated-at.bofh.it> (permalink)
References <s4XKx-3Wr-5@gated-at.bofh.it> <s5mIW-3sw-31@gated-at.bofh.it>
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* Salvatore Bonaccorso <carnil@debian.org>, 2016-08-12, 17:35:
>mitigation could be used as per https://lwn.net/Articles/696868/ .

This is behind paywall at the moment. The relevant part appears to be:

>there is a mitigation available in the form of the 
>tcp_challenge_ack_limit sysctl knob. Setting that value to something 
>enormous (e.g. 999999999) will make it much harder for attackers to 
>exploit the flaw. 

-- 
Jakub Wilk

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Thread

DSA for CVE-2016-5696 (off-path blind TCP session attack) Richard van den Berg <richard@vdberg.org> - 2016-08-11 15:00 +0200
  Re: DSA for CVE-2016-5696 (off-path blind TCP session attack) Salvatore Bonaccorso <carnil@debian.org> - 2016-08-12 17:40 +0200
    Re: DSA for CVE-2016-5696 (off-path blind TCP session attack) Jakub Wilk <jwilk@debian.org> - 2016-08-12 17:50 +0200
      Re: DSA for CVE-2016-5696 (off-path blind TCP session attack) Clément Hermann <nodens@nodens.org> - 2016-08-12 18:10 +0200
      Re: DSA for CVE-2016-5696 (off-path blind TCP session attack) Rick Moen <rick@linuxmafia.com> - 2016-08-12 22:50 +0200
      Re: DSA for CVE-2016-5696 (off-path blind TCP session attack) Sam Morris <sam@robots.org.uk> - 2016-08-15 20:50 +0200
        Re: DSA for CVE-2016-5696 (off-path blind TCP session attack) Paul Wise <pabs@debian.org> - 2016-08-16 04:30 +0200
        Re: DSA for CVE-2016-5696 (off-path blind TCP session attack) Elmar Stellnberger <estellnb@gmail.com> - 2016-08-16 21:40 +0200
          Re: DSA for CVE-2016-5696 (off-path blind TCP session attack) Dylan Frese <dmfrese@gmail.com> - 2016-08-16 21:50 +0200

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