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Message-ID: <5315B7EF.4040305@fifthhorseman.net>
Date: Tue, 04 Mar 2014 11:24:31 +0000
From: Daniel Kahn Gillmor <dkg@...thhorseman.net>
To: oss-security@...ts.openwall.com
Subject: Re: CVE Request?: konqueror - https uses all ciphers,
even weak ones
On 03/04/2014 11:12 AM, John Haxby wrote:
>
> On 4 Mar 2014, at 11:01, Daniel Kahn Gillmor <dkg@...thhorseman.net> wrote:
>
>> Here is another situation where konqueror successfully indicates a
>> "secure" connection to a server that has a known-insecure configuration:
>> point konqueror at: https://demo.cmrg.net/ -- you'll see a successful
>> connection, though that server only offers DHE over a
>> trivially-crackable 16-bit group.
>
> I suspect that this problem is fairly wide-ranging.
Perhaps this needs more than one RFC, then?
> Apple’s Safari also permits the link.
I consider this a flaw in Safari. These connections are trivially
decryptable by any passive eavesdropper. An active attacker can tamper
with the content of the session.
> Google Chrome doesn’t permit the link though, it just crashes :)
On what platform? Is this for any connection, or just for a primary
connection? That is, can any web site can crash google chrome with <img
src="https://demo.cmrg.net/" /> ?
(sorry, i don't have either chrome or safari handy to test it myself
right now)
--dkg
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