Date: Wed, 12 Feb 2014 18:46:56 +0200
From: "MustLive" <mustlive@...security.com.ua>
To: "Harry Metcalfe" <harry@....com>
Cc: full-disclosure@...ts.grok.org.uk
Subject: Re: DoS via tables corruption in WordPress

Hi Harry!

The links to my advisories and article about attack via tables corruption in
MySQL and link to proof video were in my first letter. The links are also in
the description of the video, which I posted on Saturday on YouTube.

Aris haven't mentioned those links in his letter (he didn't quoted original
letter). And I was trying not to repeat the same links all the time.

So these links can be found in the list. But if you want, here they are - to
make things a bit easier.

Link to my 2009's post, where I described my conception of attack on example
of WordPress
(http://perishablepress.com/important-security-fix-for-wordpress/comment-page-5/#comment-71666)
and posted the same advisory at my site. Also read my answers on questions 
there in comments.

Link to my 2012's article Attack via tables corruption in MySQL
(http://websecurity.com.ua/articles/attack-via-tables-corruption-in-mysql/).

Link to the video with my WordPress DoS exploit
(http://www.youtube.com/watch?v=kwv5ni_qxXs). A proof of this vulnerability
in WP and of the attack described in the article.

Best wishes & regards,
MustLive
Administrator of Websecurity web site
http://websecurity.com.ua

----- Original Message ----- 
From: "Harry Metcalfe" <harry@....com>
To: "MustLive" <mustlive@...security.com.ua>
Cc: <full-disclosure@...ts.grok.org.uk>
Sent: Wednesday, February 12, 2014 4:51 PM
Subject: Re: [Full-disclosure] DoS via tables corruption in WordPress


> Hi MustLive,
>
> Just to make things a bit easier, would you mind replying with links for
> the perishablepress.com article, the 2009 advisory and the 2012 article?
>
> Many thanks!
>
> Harry
>
>
> On 12/02/2014 14:44, MustLive wrote:
>> Hello Aris!
>>
>> First of all, I wrote all required information in my post in May 2009 at
>> perishablepress.com. And I answered on all questions (including lame ones
>> and scepsis) concerning attack on WordPress, which I proposed to owner of
>> that site as explanation why his site was hacked that time (via engine
>> reinstall). And since I developed conception of this attack yet in 2007
>> (for
>> IPB, because I have forum on this engine) and made advisories for
>> WordPress
>> and IPB concerning possibility of attacks via table corruption, so in
>> 2012 I
>> made detailed article "Attack via tables corruption in MySQL"
>> (http://websecurity.com.ua/articles/attack-via-tables-corruption-in-mysql/),
>> which I published at my site and in WASC mailing list.
>>
>> So all aspects of attacks were described and all questions were answered
>> by
>> me many years ago. Those who didn't read that information should read it,
>> those who have questions should read my 2009's advisory and 2012's
>> article -
>> AND THEY WILL HAVE NO QUESTIONS. And for those who have scepsis about
>> database corruption attacks - that it's not possible to make reliable
>> attack
>> with 100% chance to conduct attack on real web site - for those I made
>> exploit and video of its use on web site in Internet. So unbelievers
>> should
>> watch video and believe.
>>
>>> I have yet to determine if that was an accident or an attack.
>>
>> I'm sure that your case is an accident, not an attack. Since everyone
>> after
>> I proposed this attack from 2009 and till now didn't believe in
>> possibility
>> of this attack and considered it as "conceptual". I.e. that was "luck"
>> for
>> attackers to hack perishablepress.com with using of tables corruption
>> that
>> particular day and it'll not happen again for nobody as skeptics thought.
>> My
>> video should change their mind.
>>
>> First of all it's hard attack and I didn't release my exploit (and will
>> not
>> release it in near future) and not aware about anyone's exploit in the
>> public for 5 years after my 2009's advisory. So you have exact
>> combination
>> of hardware and software (MySQL and WordPress) that makes your site
>> vulnerable to this attack. Most of web sites on WordPress can sleep tight
>> until some day an attacker will test their site on "crashability" and
>> make
>> them vulnerable to this attack.
>>
>> For all nuances of attacking on tables in MySQL read my article to
>> understand your case and create scenario of possible attack on your site
>> to
>> trigger table crash, which leads to DoS. Concerning your case I'll write
>> more information to you privately. It's needed to you to find out the
>> exact
>> way of crashing tables at site to prevent "accident" turn into "attack".
>>
>> Note, that WP developers later in 2009, after reading that my publication
>> and thinking for 7 months, made a fix for this DoS in WP 2.9. But they
>> made
>> not automated tables repair, but manual, so it can't be considered as a
>> fix,
>> since tables can be crashed and site will be DoSed - until admin will
>> find
>> it and manually repair the tables. So WP developers made lame fix for
>> this
>> DoS attack, as I wrote in my 2012 advisory and WP is still vulnerable
>> (and
>> also I described DoS vulnerability in protection functionality against
>> this
>> DoS attack).
>>
>>> If Mustlive has any real and concrete information (URL, exploit code),
>>> please share with us.
>>
>> All real and concrete information is in my 2009's advisory and 2012's
>> article. With addition of my 2014's video (I was planning to make it in
>> 2012, but found time only this month). So reading and watching of them
>> will
>> help. For now I'll not release any exploits (don't need to create a risk
>> not
>> for that lame site in my video, nor for all other WordPress sites, since
>> WP
>> developers haven't fixed hole properly), but I'll do it in the future.
>>
>> Best wishes & regards,
>> MustLive
>> Administrator of Websecurity web site
>> http://websecurity.com.ua
>>
>> ----- Original Message ----- From: "Aris Adamantiadis"
>> <aris@...adc0de.be>
>> To: "Andrew Nacin" <nacin@...dpress.org>; "MustLive"
>> <mustlive@...security.com.ua>
>> Cc: <full-disclosure@...ts.grok.org.uk>
>> Sent: Tuesday, February 11, 2014 3:46 PM
>> Subject: Re: [Full-disclosure] DoS via tables corruption in WordPress
>>
>>
>>
>> Le 11/02/14 09:34, Andrew Nacin a ?crit :
>>> Aris mentions he experienced corruption in his own WordPress setup. It's
>>> most likely the options table simply crashed, not as a result of any
>>> particular exploit. This is, after all, why MySQL has a REPAIR command
>>> (and why we have a script for users to use).
>>>
>> This happened again last night. The mysql corruption was caused by an
>> OOM random kill (thanks linux) that chose mysql daemon as a victim. The
>> cause of the OOM was either wordpress or piwik, probably made possible
>> through apache misconfiguration (too many children). I have yet to
>> determine if that was an accident or an attack.
>>
>> If Mustlive has any real and concrete information (URL, exploit code),
>> please share with us.
>>
>> Aris
>>
>>
>> _______________________________________________
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