Author Archives: anantshri

SVN Extractor for Web Pentesters

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Many a times web application pen-testers are encountered with the presence of .svn folders. For those not aware .svn folder is used by SVN version control system to perform its operations. For a blackbox pentester this folder contains huge amount of information.

1) Uncover hidden files and folder names

2) Access the source code of the files.

3) download files even if the restrictions are in place at htaccess.

How this could be achieved.

1) Uncover hidden files and folder names

There are two ways in which this can be achieved based on the version of SVN in use.

for <1.6 we had .svn/entries files which contained list of files / folders as well as usernames used for commiting those files.

for >1.6 we have .svn/wc.db which contains simmilar data but in a sqlite3 format.

Those files could be directly accessible through url.

2) Access the source code / download files even if htaccess blocks its access.

SVN keeps a backup copy of all files in two seperate locations.

1) .svn/text-base/“filename”.svn-base

2) .svn/pristine/“XX”/“CHECKSUM”.svn-base

where

filename is actual name of file.

CHECKSUM is Sha1 sum of the file

XX is first two character of CHECKSUM.

first type of entries has one limitations suppose file name is testme.php so path becomes.

.svn/text-base/testme.php.svn-base

a large number of servers will execute the file using php engine and serve the output.

that’s where option 2 shines however this information is available only in case of wc.db (>1.6 SVN version) and this requires that .sv/pristine directory should be web accessible.

However after searching a lot i was not able to find a single code which can do both these things in one go.

so here is a tool which can perform both the operations in one script.

Usage

svn-extractor.py –url “url with .svn available”

Source Link : https://github.com/anantshri/svn-extractor

So far only tested on localhost environments however hoping to get some response on the same.

References

It would be unfair to say that i did all the research myself so here are the links to various resources i used to get the info out.

1) http://pen-testing.sans.org/blog/pen-testing/2012/12/06/all-your-svn-are-belong-to-us (manual technique for wc.db)

2) http://www.adamgotterer.com/post/28125474053/hacking-the-svn-directory-archive (manual technique for .svn/entries)

3) http://www.cirt.net/svnpristine (only automated tool i can find online doing 1/2 of what is in the tool)

IronWasp on Linux

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Those looking for how to download and install IRONWASP on linux.

One Line copy paste code.

wget http://blog.anantshri.info/content/uploads/2013/01/ironwasp_installer.sh.txt -O ~/ironwasp_installer.sh && sh ~/ironwasp_installer.sh

Those looking for some read can continue from here.

This post will talk about running IronWasp on Linux. So a little background.

IRONWASP : (from ironwasp.org)

IronWASP (Iron Web application Advanced Security testing Platform) is an open source system for web application vulnerability testing. It is designed to be customizable to the extent where users can create their own custom security scanners using it. Though an advanced user with Python/Ruby scripting expertise would be able to make full use of the platform, a lot of the tool’s features are simple enough to be used by absolute beginners.

Where does Linux comes into picture?

IronWASP is based on fiddlercore and uses .net for UI Designing. Hence running on linux was a bit hard. Mono is out of question here as fiddler core doesn’t play well with mono. Me and Lava did worked on checking if mono can support but the efforts didn’t work out. Then Came the crossoveroffice Give away Sale and a surprise tweet from R3dsm0k3 about being able to run ironwasp successfully through crossover office on MAC

ironwasp

From that time i was wondering why only crossover office we should be able to do it directly in wine. Finally today i got some time to sit and see how crossover do it and what could be done with Wine. and here is the output.

Disclaimer : this is in no ways a fully baked script, its bits and pieces joined overnight to get things working. I can’t promise that a new release will be done but would surely help anyone who wants to work on it.

Once you run this script all you need to do is click on next next finish for .net 20 installations and soon you will find an icon on your Linux desktop named IWASP which will launch Ironwasp for you. in the Background script will be automatically downloading and installing various dependencies required and configuring the system

Prerequsites : wine version >= 1.4 and internet connectivity.

Will try to see if i can make a video for the same setup till them this texual output should be enough.

Note: During setup if there is a prompt to restart now or later please select restart now. your system won’t reboot just wine restarts.

Download Link : ironwasp_installer.sh

One Liner

wget http://blog.anantshri.info/content/uploads/2013/01/ironwasp_installer.sh.txt -O ~/ironwasp_installer.sh && sh ~/ironwasp_installer.sh

 

Feel free to suggest changes or comment.

KNOWN ISSUES

1) UI-Designer doesn’t work for drag and drop UI building, for 32 bit Linux(working on 64 bit linux). (Mac working is confirmed by r3dsm0k3)

CHANGELOG

22-01-2013 :
1) r3dsm0k3 confirmed that script works on Mac too.
2) Code added modified to add reference.
3) Shortcut details updated to correct few issues when the api tree was not visible on right side.
4) dos2unix converted web edit’s caused script to go dos.
5) wineprefix specifically marked as 32bit.

23-01-2013:

1) Customization to make script work on 64bit linux instances.

script kiddie blocker

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this post is in continutation to the thread here : http://www.garage4hackers.com/f11/script-kiddie-blocker-2581.html

based on the details that i have gathered so far here …

Here is a htaccess code which you can use.

#Script kiddie blocker start 
#License: GPLv2 or later
#License URI: http://www.gnu.org/licenses/gpl-2.0.html
RewriteEngine On  
<IfModule mod_rewrite.c> 
RewriteCond %{HTTP_USER_AGENT} ^w3af.sourceforge.net [NC,OR] 
RewriteCond %{HTTP_USER_AGENT} dirbuster [NC,OR] 
RewriteCond %{HTTP_USER_AGENT} nikto [NC,OR]
RewriteCond %{HTTP_USER_AGENT} SF [OR]
RewriteCond %{HTTP_USER_AGENT} sqlmap [NC,OR] 
RewriteCond %{HTTP_USER_AGENT} fimap [NC,OR] 
RewriteCond %{HTTP_USER_AGENT} nessus [NC,OR] 
RewriteCond %{HTTP_USER_AGENT} whatweb [NC,OR] 
RewriteCond %{HTTP_USER_AGENT} Openvas [NC,OR] 
RewriteCond %{HTTP_USER_AGENT} jbrofuzz [NC,OR] 
RewriteCond %{HTTP_USER_AGENT} libwhisker [NC,OR] 
RewriteCond %{HTTP_USER_AGENT} webshag [NC,OR] 
RewriteCond %{HTTP:Acunetix-Product} ^WVS 
RewriteRule ^.* http://127.0.0.1 [R=301,L] 
</IfModule> 

#Script kiddie blocker End

This is a basic setup where we are redirecting these skiddies to there own system’s so that would be a fun to look at :P

I will keep adding more and more enteries as time progresses