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MD5 considered harmful

Subject: MD5 considered harmful
From: keegan.holley at sungard.com (Keegan Holley)
Date: Fri, 27 Jan 2012 18:46:41 -0500
In-reply-to: <CAPWAtbKaSx4zt3ApYW+rMfexhq=YjqvDzenQNxAcjUMwp5j_ug@mail.gmail.com>
References: <CABLLS=M6n9Sye_OVeXZ-1a+LCfQ9KBTRFpUpmbhhEY_j6HNXhA@mail.gmail.com> <[email protected]> <CAL9jLaabYat3jDOXmUBqM=kfPbJaC05XbjONbEa9juqGaosLAg@mail.gmail.com> <[email protected]> <CAL9jLaah5USAPA50SgxLyTi2sdQdpCrP_mzf3sPGBw1jMLDksQ@mail.gmail.com> <[email protected]> <[email protected]> <CABO8Q6T-XNYnxpiEAXhwqNFKSC5dnZXLCS+X7g7xL85rsDb4-A@mail.gmail.com> <CAPWAtbKaSx4zt3ApYW+rMfexhq=YjqvDzenQNxAcjUMwp5j_ug@mail.gmail.com>

2012/1/27 Jeff Wheeler <jsw at inconcepts.biz>:
> On Fri, Jan 27, 2012 at 6:35 PM, Keegan Holley
> <keegan.holley at sungard.com> wrote:
>> realizes that it's ok to let gig-e auto-negotiate. ?I've never really
>> seen MD5 cause issues.
>
> I have run into plenty of problems caused by MD5-related bugs.
>
> 6500/7600 can still figure the MSS incorrectly when using it. ?It used
> to be possible for that particular box to send over-sized frames out
> Ethernet ports with MD5 enabled, which of course were likely to be
> dropped by the neighboring router or switching equipment (perhaps even
> carrier Ethernet equipment.) ?Obviously that can be a chore to
> troubleshoot.
>
> Sometimes we choose to use it. ?Sometimes we don't.
>
> --

Bugs are a different argument though.  If you could call something
harmful because a single vendor codes it wrong there would be far
fewer windows users in the world. (I know it's friday, but please no
one change the subject to OS's)

References:
- MD5?
  - From: bstengel at kinber.org (Brian Stengel)
- MD5?
  - From: sethm at rollernet.us (Seth Mattinen)
- MD5?
  - From: morrowc.lists at gmail.com (Christopher Morrow)
- MD5?
  - From: jlewis at lewis.org (Jon Lewis)
- MD5?
  - From: morrowc.lists at gmail.com (Christopher Morrow)
- MD5 considered harmful
  - From: patrick at ianai.net (Patrick W. Gilmore)
- MD5 considered harmful
  - From: jared at puck.nether.net (Jared Mauch)
- MD5 considered harmful
  - From: keegan.holley at sungard.com (Keegan Holley)
- MD5 considered harmful
  - From: jsw at inconcepts.biz (Jeff Wheeler)

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