Openwall GNU/*/Linux - a small security-enhanced Linux distro for servers
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Tue, 12 Jul 2016 18:20:18 +1000
From: Wade Mealing <>
Subject: Re: CVE-2016-5389: linux kernel - challange ack information leak.

I've since been contacted by the researcher and have been told that
CVE-2016-5696 was reserved by mitre for this issue.  I'd like to
withdraw the usage of this CVE number and use CVE-2016-5696.

Sorry for any confusion.

Wade Mealing

On Tue, Jul 12, 2016 at 2:33 PM, Wade Mealing <> wrote:
> Gday,
> Red Hat Product Security has been made aware of an important issue in
> the Linux kernel's implementation of challenge ACKS as specified in
> RFC 5961. An attacker which knows a connections client IP, server IP
> and server port can abuse the challenge ACK mechanism
> to determine the accuracy of a normally 'blind' attack on the client or server.
> Successful exploitation of this flaw could allow a remote attacker to
> inject or control a TCP stream contents in a connection between a
> Linux device and its connected client/server.
> * This does NOT mean that cryptographic information is exposed.
> * This is not a Man in the Middle (MITM) attack.
> This was reported to Red Hat by Yue Cao, part of the Cyber Security
> Group in the University of California
> Thanks,
> Wade Mealing
> Red Hat Product Security Team
> Red Hat Bugzilla:
> Patch:

Powered by blists - more mailing lists

Your e-mail address:

Please check out the Open Source Software Security Wiki, which is counterpart to this mailing list.

Powered by Openwall GNU/*/Linux - Powered by OpenVZ