[30181] in Kerberos
Re: KfW 3.2.2 and plink on Vista
daemon@ATHENA.MIT.EDU (petesea@bigfoot.com)
Wed Jul 30 17:44:36 2008
Date: Wed, 30 Jul 2008 14:43:28 -0700 (PDT)
From: petesea@bigfoot.com
In-reply-to: <48908E06.3050805@secure-endpoints.com>
To: Jeffrey Altman <jaltman@secure-endpoints.com>
Message-id: <alpine.OSX.1.00.0807301357290.9123@zippy-air>
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Cc: kerberos@mit.edu
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On Wed, 30 Jul 2008, Jeffrey Altman wrote:
> petesea@bigfoot.com wrote:
>
>> If it's plink (and I'm not saying it isn't), then why does plink work
>> fine on Vista using KfW 3.1.0? It's only Vista using KfW 3.2.2 that
>> triggers the problem. In other words, what's different between 3.1.0
>> and 3.2.2 that triggers the problem... and only on Vista?
>
> Its not Vista. Its KFW 3.1 vs 3.2.
So how come 3.2 works fine with my existing plink on XP? Sorry, not
trying to be difficult, I just need to be able to clarify (to my
management) why we only see this on Vista and what it will take to fix it.
> The GSSAPI implementation was replaced between those releases. In 3.1 a
> single mechanism GSSAPI implementation was included. In 3.2 a
> multi-mechanism implementation is included. In 3.1 the GSSAPI could
> refuse to deallocate memory that wasn't allocated by the mechanism. In
> 3.2 the GSSAPI does not.
>
> plink/putty has a bug. I know it has a bug because the bug was fixed a
> long time ago. the bug was masked by KFW 3.1 and is not masked by 3.2.
OK. I wasn't trying to dispute the possibility of a bug in plink/putty...
I was just looking for a more detailed explanation. Thanks for providing
it. But I still would like to see a reason for why 3.2 works on XP if you
know.
> Please get a new putty.
Unfortunately, since the GSSAPI patch I have is for 0.58, I'll need to do
quite a bit of work to get it into 0.60 (the latest version of PuTTY).
Since this problem only seems to occur with KfW 3.2.2, I need to weight
the advantages of upgrading to 3.2.2 vs the time it will take to adapt my
patch to PuTTY 0.60 and test.
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