2010/6/28 MustLive <[email protected]>: > 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 > > > _______________________________________________ > Full-Disclosure - We believe in it. > Charter: http://lists.grok.org.uk/full-disclosure-charter.html > Hosted and sponsored by Secunia - http://secunia.com/ _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/
