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Re: [xmpp] IQ Handling vulnerabilities

"Joe Hildebrand (jhildebr)" <jhildebr@cisco.com> Mon, 10 February 2014 17:15 UTC

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From: "Joe Hildebrand (jhildebr)" <jhildebr@cisco.com>
To: "Joe Hildebrand (jhildebr)" <jhildebr@cisco.com>, Dave Cridland <dave@cridland.net>
Thread-Topic: [xmpp] IQ Handling vulnerabilities
Thread-Index: AQHPIy5NY8RkLrfuaUqqtuYhYOIBR5qopVEAgACdaoCAAL9TgP//w6cAgACRRID//6GvV4AEt5CA
Date: Mon, 10 Feb 2014 17:15:20 +0000
Message-ID: <CF1E56C5.38F45%jhildebr@cisco.com>
References: <CAOb_FnxS-dMT85N7LHj5M9JWk3pL85=ugrDqaT7j5d28HBr0Cw@mail.gmail.com> <CF194491.38AD3%jhildebr@cisco.com> <2F5E925F-021D-408E-91D9-3CC5BEB6BEC6@nostrum.com> <48F4D361-4403-47E6-862D-FBDDDEBCC642@xnyhps.nl> <CF1A369C.38BE2%jhildebr@cisco.com> <CAKHUCzyCwKbmnUoXLHW=XzYbiFrcg-dQsDojGUnA-_r3qK+_Vg@mail.gmail.com> <CF1A4928-54B5-4A95-9A4B-0EC572A3CDBD@cisco.com>
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Cc: Ben Campbell <ben@nostrum.com>, XMPP Working Group <xmpp@ietf.org>
Subject: Re: [xmpp] IQ Handling vulnerabilities
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On 2/7/14 8:13 AM, "Joe Hildebrand (jhildebr)" <jhildebr@cisco.com> wrote:

>I have a couple of ludicrous s2s attacks on mind, but more important I
>think is doing what
>
>Mobile/terse. DYAC.

Yes, well that was even more terse than normal.  I was going to say
something about generating less-guessable IDs that don't eat up much
entropy.  For example:

start = sha1(crytpo_rand())
start+1 = sha1(start)

would probably do nicely.

-- 
Joe Hildebrand

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