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Vulnerability Alert

Microsoft Internet Explorer mshtml.dll Memory Pointer Information Disclosure Vulnerability

 
Threat Type:CWE-200: Information Leak / Disclosure
IntelliShield ID:20815
Version:1
First Published:2010 July 01 19:01 GMT
Last Published:2010 July 01 19:01 GMT
Port: Not available
BugTraq ID:41247
Urgency:Unlikely Use
Credibility:Highly Credible
Severity:Harassment
CVSS Base:4.3 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:3.5
 
Version Summary:

Microsoft Internet Explorer contains a vulnerability that could allow an unauthenticated, remote attacker to view sensitive? browser-based information.? Updates are not available.

 
 
Description

Microsoft Internet Explorer contains a vulnerability that could allow an unauthenticated, remote attacker to view sensitive  browser-based information.

The vulnerability is due to an implementation error in Internet Explorer.  An unauthenticated, remote attacker could exploit the vulnerability by convincing a user to view a malicious website.  If successful, the attacker could gain access to sensitive information.

Microsoft has not confirmed this vulnerability and software updates are not available.

 
Warning Indicators

Microsoft Internet Explorer version 8.0 is vulnerable.

 
IntelliShield Analysis

To exploit the vulnerability, an attacker must convince a user to view a malicious website.  The attacker may provide links to users in e-mail messages or instant messages, combined with social engineering techniques designed to make a user trust the source of a provided link.

When viewed, a malicious website could allow the attacker to view browser-based information that could assist the attacker in further exploits.  The information gained could allow the attacker to determine memory addresses to bypass protections such as address space layout randomization (ASLR) or other memory protections.  The information could also be used to determine the uniqueness of a user's browser contributing to a browser or system fingerprint, allowing the attacker to track user browsing habits.

 
Vendor Announcements

Vendor announcements are not available.

 
Impact

An unauthenticated, remote attacker could exploit this vulnerability to access sensitive information that could be used to assist in further attacks.

 
Technical Information

The vulnerability is due to an implementation error in generating event identification numbers in Internet Explorer.  The mshtml.dll module generates predictable values for the IDEvent variable by using memory address pointers.  As a result, memory address information may be determined by examining the IDEvent values.

An unauthenticated, remote attacker could exploit the vulnerability by convincing a user to view a malicious website.  When viewed, the attacker could access sensitive information from the browser that could be used in further attacks.

 
Safeguards

Administrators are advised to apply software updates as they become available.

Users are advised not to open e-mail messages from suspicious or unrecognized sources. If users cannot verify that links or attachments included in e-mail messages are safe, they are advised not to open them.

Administrators are advised to monitor critical systems.

 
Patches/Software

Patches and software updates are not available.

 
Alert History
 

Initial Release



Product Sets
 
The security vulnerability applies to the following combinations of products.

Primary Products:
Microsoft, Inc.Internet Explorer 8.0 Base

Associated Products:
Microsoft, Inc.Windows 7 for 32-bit systems Base | for x64-based systems Base
Microsoft, Inc.Windows Server 2003 Datacenter Edition Base, SP1, SP2 | Datacenter Edition, 64-bit (Itanium) Base, SP1, SP2 | Datacenter Edition x64 (AMD/EM64T) Base, SP2 | Enterprise Edition Base, SP1, SP2 | Enterprise Edition, 64-bit (Itanium) Base, SP1, SP2 | Enterprise Edition x64 (AMD/EM64T) Base, SP2 | Standard Edition Base, SP1, SP2 | Standard Edition, 64-bit (Itanium) Base, SP1, SP2 | Standard Edition x64 (AMD/EM64T) Base, SP2 | Web Edition Base, SP1, SP2
Microsoft, Inc.Windows Server 2008 Datacenter Edition Base, SP1, SP2 | Datacenter Edition, 64-bit Base, SP1, SP2 | Itanium-Based Systems Edition Base, SP1, SP2 | Enterprise Edition Base, SP1, SP2 | Enterprise Edition, 64-bit Base, SP1, SP2 | Essential Business Server Standard Base, SP1, SP2 | Essential Business Server Premium Base, SP1, SP2 | Essential Business Server Premium, 64-bit Base, SP1, SP2 | Standard Edition Base, SP1, SP2 | Standard Edition, 64-bit Base, SP1, SP2 | Web Server Base, SP1, SP2 | Web Server, 64-bit Base, SP1, SP2
Microsoft, Inc.Windows Vista Home Basic Base, SP1, SP2 | Home Premium Base, SP1, SP2 | Business Base, SP1, SP2 | Enterprise Base, SP1, SP2 | Ultimate Base, SP1, SP2 | Home Basic x64 Edition Base, SP1, SP2 | Home Premium x64 Edition Base, SP1, SP2 | Business x64 Edition Base, SP1, SP2 | Enterprise x64 Edition Base, SP1, SP2 | Ultimate x64 Edition Base, SP1, SP2
Microsoft, Inc.Windows XP Home Edition Base, SP1, SP2, SP3 | Professional Edition Base, SP1, SP2, SP3 | Professional x64 (AMD/EM64T) Base, SP2




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