BugTraq
Re: OpenID/Debian PRNG/DNS Cache poisoning advisory Aug 08 2008 03:06PM
Eric Rescorla (ekr networkresonance com) (2 replies)
RE: OpenID/Debian PRNG/DNS Cache poisoning advisory Aug 12 2008 08:55AM
Clausen, Martin (DK - Copenhagen) (mclausen deloitte dk) (2 replies)
Re: OpenID/Debian PRNG/DNS Cache poisoning advisory Aug 12 2008 02:42PM
Ben Laurie (benl google com)
Re: OpenID/Debian PRNG/DNS Cache poisoning advisory Aug 12 2008 01:31PM
Ben Laurie (benl google com)
RE: OpenID/Debian PRNG/DNS Cache poisoning advisory Aug 08 2008 04:31PM
Dave Korn (dave korn artimi com) (2 replies)
RE: OpenID/Debian PRNG/DNS Cache poisoning advisory Aug 08 2008 05:04PM
Leichter, Jerry (leichter_jerrold emc com)
Re: OpenID/Debian PRNG/DNS Cache poisoning advisory Aug 08 2008 04:57PM
Eric Rescorla (ekr networkresonance com) (4 replies)
Re: OpenID/Debian PRNG/DNS Cache poisoning advisory Aug 08 2008 05:49PM
pgut001 cs auckland ac nz (Peter Gutmann)
Re: OpenID/Debian PRNG/DNS Cache poisoning advisory Aug 08 2008 05:43PM
Dan Kaminsky (dan doxpara com) (3 replies)
Re: OpenID/Debian PRNG/DNS Cache poisoning advisory Aug 08 2008 10:29PM
Stefan Kanthak (stefan kanthak nexgo de)
Dan Kaminsky wrote:
>
>
> Eric Rescorla wrote:
>> At Fri, 8 Aug 2008 17:31:15 +0100,
>> Dave Korn wrote:
>>
>>> Eric Rescorla wrote on 08 August 2008 16:06:
>>>
>>>
>>>> At Fri, 8 Aug 2008 11:50:59 +0100,
>>>> Ben Laurie wrote:
>>>>
>>>>> However, since the CRLs will almost certainly not be checked, this
>>>>> means the site will still be vulnerable to attack for the lifetime of
>>>>> the certificate (and perhaps beyond, depending on user
>>>>> behaviour). Note that shutting down the site DOES NOT prevent the attack.
>>>>>
>>>>> Therefore mitigation falls to other parties.
>>>>>
>>>>> 1. Browsers must check CRLs by default.
>>>>>
>>>> Isn't this a good argument for blacklisting the keys on the client
>>>> side?
>>>>
>>> Isn't that exactly what "Browsers must check CRLs" means in this context
>>> anyway? What alternative client-side blacklisting mechanism do you suggest?
>>>
>>
>> It's easy to compute all the public keys that will be generated
>> by the broken PRNG. The clients could embed that list and refuse
>> to accept any certificate containing one of them. So, this
>> is distinct from CRLs in that it doesn't require knowing
>> which servers have which cert...
> Funnily enough I was just working on this -- and found that we'd end up
> adding a couple megabytes to every browser.

At least for the weak keys kudos to Debian's OpenSSL maintainer
there exists an extension to Firefox which checks the keys, see <http://codefromthe70s.org/sslblacklist.asp>, as well as c't's
SSLguardian for the Windows Crypto API, see
<http://www.heise-online.co.uk/security/features/111039/0> and
<http://www.heise-online.co.uk/security/features/111039/1>

Stefan

[ reply ]
Re: OpenID/Debian PRNG/DNS Cache poisoning advisory Aug 08 2008 07:52PM
Tim Dierks (tim dierks org)
Re: OpenID/Debian PRNG/DNS Cache poisoning advisory Aug 08 2008 06:20PM
Eric Rescorla (ekr networkresonance com) (3 replies)
Re: OpenID/Debian PRNG/DNS Cache poisoning advisory Aug 08 2008 09:28PM
Florian Weimer (fw deneb enyo de)
key blacklisting & file size (was: OpenID/Debian PRNG/DNS Cache poisoning advisory) Aug 08 2008 08:04PM
Solar Designer (solar openwall com)
Re: OpenID/Debian PRNG/DNS Cache poisoning advisory Aug 08 2008 07:33PM
Nicolas Williams (Nicolas Williams sun com) (1 replies)
Re: OpenID/Debian PRNG/DNS Cache poisoning advisory Aug 08 2008 07:52PM
Leichter, Jerry (leichter_jerrold emc com) (1 replies)
Re: OpenID/Debian PRNG/DNS Cache poisoning advisory Aug 08 2008 08:33PM
Eric Rescorla (ekr networkresonance com) (2 replies)
Re: OpenID/Debian PRNG/DNS Cache poisoning advisory Aug 09 2008 01:37AM
Forrest J. Cavalier III (mibsoft mibsoftware com)
Re: OpenID/Debian PRNG/DNS Cache poisoning advisory Aug 08 2008 08:51PM
Leichter, Jerry (leichter_jerrold emc com)
Re: OpenID/Debian PRNG/DNS Cache poisoning advisory Aug 08 2008 05:11PM
Ben Laurie (benl google com) (1 replies)
Re: OpenID/Debian PRNG/DNS Cache poisoning advisory Aug 08 2008 06:08PM
Perry E. Metzger (perry piermont com) (1 replies)
Re: OpenID/Debian PRNG/DNS Cache poisoning advisory Aug 08 2008 06:47PM
Nicolas Williams (Nicolas Williams sun com) (1 replies)
Re: OpenID/Debian PRNG/DNS Cache poisoning advisory Aug 08 2008 07:35PM
Paul Hoffman (paul hoffman vpnc org) (1 replies)
Re: OpenID/Debian PRNG/DNS Cache poisoning advisory Aug 08 2008 08:08PM
Nicolas Williams (Nicolas Williams sun com)
RE: OpenID/Debian PRNG/DNS Cache poisoning advisory Aug 08 2008 05:08PM
Dave Korn (dave korn artimi com)


 

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