I wrote a very small script to set static IPs on a kubuntu box.

#!/bin/bash
if [ $# -lt 4 ]
then
    echo "Usage: $0 <interface> <ip> <netmask> <gateway> <dns1>"
exit
fi
ifconfig $1 $2 netmask $3
echo "Static IP set"
route add default gw $4
echo "Routes added"
if [ "$5" != "" ]
then
    echo "nameserver $5" >>/etc/resolv.conf
fi
echo "DNS set"

If you want to find out the components of a site’s certificate the following commands will help you.
If you want to find if the certificate is signed with the weak MD5 signature algorithm:
$ echo | openssl s_client -connect webserver.example.com:443 2>/dev/null | sed -ne ‘/—–BEGIN CERTIFICATE—–/,/—–END CERTIFICATE—–/p’ | openssl x509 -text | grep “Signature Algorithm”| gawk ‘{print $3}’

$ echo | openssl s_client -connect 167.155.38.24:443 2>/dev/null | sed -ne ‘/—–BEGIN CERTIFICATE—–/,/—–END CERTIFICATE—–/p’ | openssl x509 -text | grep “Exponent”

I installed KUbuntu “Breezy Badger” on my new Laptop (Dell Inspiron 700m) but none of my java based tools seemed to be working.

The errors I was getting were as follows:

** ERROR **: file ../../../src/libjava/jni/gtk-peer/gnu_java_awt_peer_gtk_GtkImage.c: line 572 (createRawData): assertion failed: (data_fid != 0)

aborting…

The trick is to use the Sun JVM and not the gcj (GNU Java Compiler). Apparently in Debian threads (on which KUbuntu is based) has this error in gcj-4.0. They promise that it will be fixed in version gcj-4.1 (which comes with gcc-4.1).

So follow these steps to get burp / paros etc working:
1. Goto java.sun.com and install the latest jvm for linux. Choose an appropriate location, mine was installed on /opt/jdk1.5.0_06/.
2. rm /usr/bin/java /usr/bin/javac /usr/bin/javah. (you remove symbolic links in /usr/bin which point the version of java to /etc/alternatives).
3. Create new symbolic links

# cd /usr/bin
# ln -s /opt/jdk1.5.0_06/bin/javac javac
# ln -s /opt/jdk1.5.0_06/bin/javah javah
# ln -s /opt/jdk1.5.0_06/bin/java java

Now you should be good to go!

-Rajat.

It can get interesting to test the security of thick client applications. If you start debugging you could end up losing a lot of time with not too many results. Of course, time is always at a premium when you pen testing in a week long gig. There are a couple of tools that can really help you to gain insight into a thick client (i.e., an application written in a binary format such as an executable, ActiveX control, flash object, etc.) and communicating to a server using the client/server model.
The need for a proxy to hook into the communications is a prime need and EchoMirage can do a great job of hooking into function calls related to win32 sockets, openssl functions. You have to select an active process for Echomirage to inject into or you can even spawn a process from the menu options in EchoMirage itself. It’s a great tool with a built-in editor so you can edit the traffic. However, sometimes you have to be careful because it’s binary data that you are editing so while editing it is easy to mess up a few flags, etc.
Another great tool is actually a plugin for OllyDbg called UHooker that can let you specify which functions you want to place a hook into. You have to configure a binary editor of your choosing and the functions to be hooked into in a .cfg file. The documentation for Uhooker is located here.

This had me stumped but it’s not that tough. The persona website getpersonas.com tends to install personas without any permissions. But you can disable it by typing “about:config” in the Firefox address bar and remove any entry in the following property: lightweightThemes.usedThemes
There it is…you’ve now disabled personas!

I’ve been struggling to find the best working version of John so that it can crack MS Cache outputs from Cachedump (of course, this functionality is now included in fgdump). Running fgdump gives two files host.pwdump and hostname.cachedump. I’ve found 127.0.0.1.pwdump and 127.0.0.1.cachedump files upon using fgdump without any parameters.
So now you have the Cached credentials but then comes the big problem of cracking those. So there’s the jumbo patch for john-1.7.2.
Following commands need to be executed to get this patch going:

$ tar zxvf john-1.7.2.tar.gz
$ cd john-1.7.2/
$ wget http://www.openwall.com/john/contrib/john-1.7.2-all-9.diff.gz
$ gzip -d john-1.7.2-all-9.diff.gz
$ patch -p1 <john-1.7.2-all-9.diff
$ cd src/
$ make linux-x86-sse2

You get some warnings upon compilations but the executable works very well.

Go ahead and get cracking:
$ cd run/
$ ./john –format=mscash

While compiling socat-2.0.0-b5 on cygwin (Windows) I got a few errors and here’s how I fixed it:
xioopts.c: In function 'applyopts_single':
xioopts.c:3998: error: 'struct single' has no member named 'fd1'
xioopts.c:4000: error: 'struct single' has no member named 'fd1'
make[1]: *** [xioopts.o] Error 1
Edit the file xioopts.c in your favorite editor and replace ‘fd1’ by ‘rfd’ in both lines (3998 & 4000). That fixed this error but then I got my next error.

xio-ip.c:480: error: structure has no member named `ipi_spec_dst'
Edit xio-ip.c and comment out the entire snprintf statement in xio-ip.c line 480.

Continue compilation and it should now work fine.