Full Disclosure mailing list archives
Re: Five Ways to Screw Up SSL
From: "Dude VanWinkle" <dudevanwinkle () gmail com>
Date: Tue, 23 May 2006 09:50:33 -0400
On 5/22/06, Brian Dessent <brian () dessent net> wrote:
Valdis.Kletnieks () vt edu wrote: > > On Mon, 22 May 2006 12:02:23 EDT, Dude VanWinkle said: > > > DNS foo to the client, how easy is that? Would you have to get the > > upstream DNS server to cache your bogus entry? > > You'd be *amazed* how many are still running BIND 4 or 8.... That, or use a browser exploit or mass email to drop a small program on the end user's machine that changes the configured values of the DNS servers to ones that you run. You don't even have to leave any traces of this (like .exe files that run at startup), it could be a one-time configuration change. The end user would have no clue this had happened since the malicious servers would be standard recursive resolvers, so their net access remains fully operational...
So just taking over their lmhosts would invalidate the chain o' authority. I guess you would hijack their machines with a bug that would edit the local cache, refresh the cache, then report to you about the websites the victim's machine had visited, and you could request an ssl cert for those sites. The only problem I see with this scenario from a freessl perspective is that they require verification in the form of an email sent to admin () domain com or from an email sent to the admin from the upstream DNS provider. This would be a little tricky to get around as you would have to munge freessl's DNS records. -JP Gotcha, thanks for the lesson -JP _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/
Current thread:
- Five Ways to Screw Up SSL Ginsu Rabbit (May 21)
- Re: Five Ways to Screw Up SSL Michal Zalewski (May 21)
- Re: Five Ways to Screw Up SSL Ginsu Rabbit (May 21)
- Re: Five Ways to Screw Up SSL Dude VanWinkle (May 21)
- Re[2]: Five Ways to Screw Up SSL Thierry Zoller (May 21)
- Re: Re[2]: Five Ways to Screw Up SSL Dude VanWinkle (May 22)
- Re: Five Ways to Screw Up SSL Michael Holstein (May 22)
- Re: Five Ways to Screw Up SSL Dude VanWinkle (May 22)
- Re: Five Ways to Screw Up SSL Valdis . Kletnieks (May 22)
- Re: Five Ways to Screw Up SSL Brian Dessent (May 22)
- Re: Five Ways to Screw Up SSL Dude VanWinkle (May 23)
- Re: Five Ways to Screw Up SSL Brian Eaton (May 23)
- Re: Five Ways to Screw Up SSL Dude VanWinkle (May 23)
- Re: Five Ways to Screw Up SSL Ginsu Rabbit (May 21)
- Re: Five Ways to Screw Up SSL Michal Zalewski (May 21)
- Re: Five Ways to Screw Up SSL Michael Holstein (May 22)