Date: Tue, 29 Jun 2010 13:41:14 -0700
From: Chris Evans <scarybeasts@...il.com>
To: MustLive <mustlive@...security.com.ua>
Cc: full-disclosure@...ts.grok.org.uk
Subject: Re: Using of the sites for attacks on other sites

2010/6/28 MustLive <mustlive@...security.com.ua>:
> Hello participants of Full-Disclosure!
>
> For last two months I didn't post my articles to this list due to some not
> serious moaning in April on some of my articles (you always can find my
> articles at my site and in WASC Mailing List). But at the end of June I
> decided to remind you about my last articles.
>
> Recently I wrote new article Using of the sites for attacks on other sites
> (http://websecurity.com.ua/4322/). This is brief English version of it.
>
> Last year in article DoS attacks via Abuse of Functionality vulnerabilities
> (it was mentioned at
> http://jeremiahgrossman.blogspot.com/2010/01/top-ten-web-hacking-techniques-of-2009.html)

I do not see your name anywhere in the top ten?

Cheers
Chris

> I told about possibility of conducting of DoS attacks via Abuse of
> Functionality vulnerabilities at other sites. Particularly I showed examples
> of such vulnerabilities at web sites regex.info and www.slideshare.net.
> These attacks can be as unidirectional DoS, as bidirectional DoS, depending
> on capacities of both servers.
>
> And now I'll tell you about possibility of conducting of CSRF attacks on
> other sites via Abuse of Functionality vulnerabilities. Researching of such
> attacks I begun already at 2007 when found such vulnerability at regex.info.
>
> Using of Abuse of Functionality for attacks on other sites.
>
> Sites, which allow to make requests to other web sites (to arbitrary web
> pages), have Abuse of Functionality vulnerability and can be used for
> conducting of CSRF attacks on other sites. Including DoS attacks via Abuse
> of Functionality, as it was mentioned above. CSRF attacks can be made only
> to those pages, which don't require authorization.
>
> For these attacks it's possible to use as Abuse of Functionality
> vulnerabilities (similar to mentioned in this article), as Remote File
> Include vulnerabilities (like in PHP applications) - it's Abuse of
> Functionality via RFI.
>
> This attack method can be of use when it's needed to conduct invisible CSRF
> attack on other site (to not show yourself), for conducting of DoS and DDoS
> attacks and for conducting of other attacks, particularly for making
> different actions which need to be made from different IP. For example, at
> online voting, for turning of hits of counters and hits of advertising at
> the site, and also for turning of clicks (click fraud).
>
> Abuse of Functionality:
>
> Attack is going at request of one site (http://site) to another
> (http://another_site) at using of appropriate function of the site
> (http://site/script).
>
> http://site/script?url=http://another_site
>
> Advantages of this attack method.
>
> In this part of the article I wrote a list of advantages of this attack
> method. And I mentioned another two important paragraphs:
>
> Note, that this DoS attack is possible to use for attacks on redirectors,
> which I wrote about in my articles Redirector’s hell and Hellfire for
> redirectors.
>
> Also at conducting of DoS attacks it's possible to use several such servers
> at once and so to conduct DDoS attack. In such case these servers will be
> appearing as zombie-computers. I.e. botnet will be made from not home
> computers, but from web servers (which can have larger capacities and faster
> connections). So these vulnerabilities can lead to appearing of new class of
> botnets (with zombie-servers).
>
> Examples of vulnerable web sites and web services.
>
> In this part of the article I showed examples of different web sites and web
> services which could be used for conducting of attacks on other sites.
> Including regex.info, www.slideshare.net, anonymouse.org, www.google.com,
> translate.google.com, babelfish.altavista.com, babelfish.yahoo.com,
> keepvid.com, web application Firebook, W3C validators and iGoogle.
>
> Best wishes & regards,
> MustLive
> Administrator of Websecurity web site
> http://websecurity.com.ua
>
>
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