exploit the possibilities
Home Files News &[SERVICES_TAB]About Contact Add New

winhex.txt

winhex.txt
Posted Nov 2, 2005
Authored by unl0ck | Site exploiterz.org

WinHeX Heap overflow.

tags | overflow
SHA-256 | d145e6f98fc6be00761888279dbfb33e1e7f5d2217d27cb1a5e8e772029e1297

winhex.txt

Change Mirror Download
WinHex 12.05 SR-14 (maybe others)

author: Darkeagle
date : 14.04.05
vendor: http://www.x-ways.net/

overview:

WinHex is a powerfully hex editor in win32 systems.

details:

I'mma found heap corruption bug in latest version of WinHex (12.05).
When WinHex opens very long filename in 1st argument, it's crashed.

Look at below code:

...
XOR EAX,EAX
MOV BL,BYTE PTR DS:[EDX+EAX]
MOV BYTE PTR DS:[ECX+EAX],BL
INC EAX
CMP BYTE PTR DS:[EDX+EAX-1],0
...

PUSH EDX ; argv2 <-- put arguments in stack registers ----|
PUSH EAX ; argv1 <----------------------------------------
CALL <JMP.&kernel32.lstrcpynA> ; lstrcpynA <---- using strcpy() without checking...

There is bug. After crash in debugger you can notice that following registers were overwrote:

DS = 0x61616161?
ECX = 0x61616161?
ESI = 0x61616161?

EIP now point to: 0x004EF55B ( WinXP SP0 RUS )

004EF55B |. 881C01 |MOV BYTE PTR DS:[ECX+EAX],BL

Ok! This is means that 0x004EF55B trying to read instruction on 0x61616161 address and then crash.

(c) Darkeagle
Login or Register to add favorites

File Archive:

March 2024

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

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2022 Packet Storm. All rights reserved.

Services
Security Services
Hosting By
Rokasec
close