Follow @Openwall on Twitter for new release announcements and other news
[<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

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

Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.