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Date: Sat, 04 Aug 2007 14:19:34 +0200
From: "Michal Bucko" <>
Subject: [ELEYTT] 4SIERPIEN2007

Eleytt Research

Michal Bucko, Eleytt,
Shyaam Sundhar, Eleytt
Tomasz Galdys, Eleytt


Michal Bucko, Eleytt,

Vulnerability Table

1. Windows Calendar (Vista) ICS File Denial of Service Vulnerability
2. Toolbar vulnerabilities:

a) Toolbar Gaming IE Toolbar Denial of Service Vulnerability
b) ExportNation IE Toolbar Denial of Service Vulnerability
c) Advanced Searchbar Denial of Service Vulnerability

Information Table

1. OpenOffice 2.2 Multiple File Extensions Handling Denial of Service Issue

Vulnerability Details

1. Windows Calendar (Vista) ICS File Denial of Service Vulnerability

Specially malformed ISC file, once imported to Windows Calendar, 
leads to Windows Calendar to a crash (after the remainder is set). 
Windows Calendar crashes every each time Vista is rebooted. The 
vulnerability stems from NULL pointer dereference and has been 
confirmed on fully updated Windows Vista. Successful at

MSRC has been informed and confirmed the situation. Both, Eleytt 
and MSRC consider this issue of low impact.

2. Toolbar vulnerabilities

a) The vulnerability in 'CallCmd' function in toolbar_gaming.dll
has its roots in NULL pointer dereference, which results in 
denial of service conditions.

b) The vulnerability lies in Toolbar.DLL library, in 'isChecked' 
The registers' values are below:

EIP 01838C70
EAX 00000000

The crash itself happens here:  
1838C70	MOV ECX,[EAX+188]	

Stack dump is full of 'A', but SEH hasn't been overwritten. The problem
lies in NULL pointer dereference. The vulnerability, therefore, hasn't 
been proven exploitable. Arbitrary code execution is probably impossible.

c) The vulnerability lies in Toolbar.DLL library, in 'isChecked' 
function. The exactly the same kind of vulnerability that described
in b).

Information Table

1. OpenOffice 2.2 Multiple File Extensions Handling Denial of Service Issue
An issue in OpenOffice 2.2 Multiple File Extension Handling leads to denial 
of service conditions. Due to the minimum severity of the issue, the 
information is provided in Information Table. The issue does not allow code
execution. Eleytt provides exemplary PoC exploits for this issue for 
reponsible security companies only.   

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Eleytt - Company Information

Eleytt Corporation is specialized in penetration testing, vulnerability
development, advanced reverse engineering and exploitation techniques.
Eleytt provides various security-related services: risk assessment,
security policy, security assurance, incident management, web
application security testing, continuous security assurance programs.
Eleytt provides security audits for financial institutions and e-commerce.
Eleytt provides an in-depth security analysis - experienced security
experts analyze your source code, analyze your application, analyze your
web application. Eleytt runs security programs for financial institutons
and e-commerce.

We have the mission to improve the security level of software and web
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We help you understand the risk and deploy security solutions. We help
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These are the questions, which might help you understand how we work:

Want to get your web site checked for security vulnerabilities?

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For more information, please use:


This document and all the information it contains are provided "as is",
for educational purposes only, without warranty of any kind, whether
express or implied.

The authors reserve the right not to be responsible for the topicality,
correctness, completeness or quality of the information provided in
this document. Liability claims regarding damage caused by the use of
any information provided, including any kind of information which is
incomplete or incorrect, will therefore be rejected.

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