WebWatchBot Monitor 5.1.16 - Divide Zero Vulnerability

Document Title:
===============
WebWatchBot Monitor 5.1.16 - Divide Zero Vulnerability



Release Date:
=============
2011-09-05


Vulnerability Laboratory ID (VL-ID):
====================================
7


Common Vulnerability Scoring System:
====================================
3.5


Product & Service Introduction:
===============================
Performance Monitoring Software for Websites, Servers and Infrastructure Continuous website, server and infrastructure 
monitoring is critical to ensuring that your website and web-based applications are available and performing with 
acceptable response times. WebWatchBot 5.0 is the leading website and server monitoring software solution for real-time 
performance awareness and problem notification 

(Copy of the Vendor Homepage: http://www.exclamationsoft.com/webwatchbot/)


Abstract Advisory Information:
==============================
Vulnerability-Lab Research Team discovered a Divide by Zero Vulnerability in the WebWatchBot Monitoring Software.


Vulnerability Disclosure Timeline:
==================================
2011-07-31: Discovery by Vulnerability-Lab


Discovery Status:
=================
Published


Affected Product(s):
====================
ExclamationSoft
Product: WebWatchBot 5.1.16


Exploitation Technique:
=======================
Local


Severity Level:
===============
Low


Technical Details & Description:
================================
A devide by zero bug is detected on the webwatchbot v5.1.16 monitor security software.
A validation/calculation mistake on the Watch Item Name module allows an attacker to crash the software stable via 
integer devide by zero bug. After the crash the software can not be restored & needs a new installation on the system.

Vulnerable Module(s):
								[+] Watch Item Name


--- Error Logs ---
Problemsignatur
Problemereignisame:	APPCRASH
Anwendungsname:	WWBGui.exe
Anwendungsversion:	5.1.11.0
Anwendungszeitstempel:	4ad4d142
Fehlermodulname:	WWBGui.exe
Fehlermodulversion:	5.1.11.0
Fehlermodulzeitstempel:	4ad4d142
Ausnahmecode:	c0000005
Ausnahmeoffset:	0005adf3
Betriebsystemversion:	6.0.6002.2.2.0.768.3
Gebietsschema-ID:	1031
Zusatzinformation 1:	548d
Zusatzinformation 2:	f1d9ae1d9e344996d3f71e37c557d47c
Zusatzinformation 3:	3b65
Zusatzinformation 4:	6436551fe7991743a8303abd6bb203a9


--- Debug Exception Logs ---
(2388.19cc): Integer divide-by-zero - code c0000094 (first chance)
First chance exceptions are reported before any exception handling.
This exception may be expected and handled.
eax=635f5ea6 ebx=00000001 ecx=005f0000 edx=00000000 esi=00000000 edi=00001772
eip=0225da3d esp=0012f5ac ebp=0012f5e0 iopl=0         nv up ei pl zr na pe nc
cs=001b  ss=0023  ds=0023  es=0023  fs=003b  gs=0000             efl=00210246
0225da3d f775d0          div     eax,dword ptr [ebp-30h] ss:0023:0012f5b0=00000000


Proof of Concept (PoC):
=======================
This vulnerability can be exploited by local attackers via restricted user access. For demonstration or reproduce ...

Manually reproduce:
1. Go to "Watch Item Name" module on the menu labels 
2. Include for example a long negative zer0 strings with a space between
3. Save the configuration of the new item 
4. Error reports and problem signatures will be displayed and the result is a classic divide by zero software bug
5. After the startup the software crashs stable and can not be recovered


Security Risk:
==============
The security risk of the local divide by zero vulnerability is estimated as medium.


Credits & Authors:
==================
Vulnerability Research Laboratory


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=========================
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