RE: openssh remote exploit

["Edward W. Ray" <support () mmicman com>]

Either your just an ass or an Theo hater or both.

Either way, your comments are without merit.  If one looks at the record of
OpenBSD and OpenSSH it is certainly way better than the other software out
there.

Regards,

Edward W. Ray
SANS GCIA, GCIH 

-----Original Message-----
From: full-disclosure-admin () lists netsys com
[mailto:full-disclosure-admin () lists netsys com] On Behalf Of Darren Reed
Sent: Tuesday, September 16, 2003 9:41 AM
To: auto64746 () hushmail com
Cc: full-disclosure () lists netsys com
Subject: Re: [Full-disclosure] openssh remote exploit

In some mail from auto64746 () hushmail com, sie said:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Look closer.
>
> buffer->alloc += len + 32768;
>    if (buffer->alloc > 0xa00000)
>    fatal("buffer_append_space: alloc %u not supported",buffer->alloc);
>
> buffer->buf = xrealloc(buffer->buf, buffer->alloc);
> goto restart;
>
> i do not have belief of giving the codepath but we must take 
> buffer_free and make overflow by '\0'.
> this is not exploit of 2.4.x as malloc never return null. unless 
> malloc w00d00.

Ah, I see what you mean.  I was looking at the code assuming all the
functions called worked perfectly and that fatal() did nothing fancy.
In reading it through, I took an attitude of not looking at any other files
or functions to see what they did as the pointer didn't mention those and
who knows where it might have ended or how much time it would have taken ?
Remember, this is OpenSSH - the world's most perfect software.

And  I'm sure this will manage to be another remote exploit that the OpenBSD
team will find a way to not count on their front page.

Cheers,
Darren

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Charter: http://lists.netsys.com/full-disclosure-charter.html