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AUSCERT External Security Bulletin Redistribution
ESB-2010.0907
Cumulative Security Update for Internet Explorer
13 October 2010
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AusCERT Security Bulletin Summary
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Product: Microsoft Internet Explorer 6
Microsoft Internet Explorer 7
Microsoft Internet Explorer 8
Publisher: Microsoft
Operating System: Windows XP
Windows Vista
Windows 7
Windows Server 2003
Windows Server 2008
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Cross-site Scripting -- Remote with User Interaction
Access Confidential Data -- Remote with User Interaction
Read-only Data Access -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2010-3331 CVE-2010-3330 CVE-2010-3329
CVE-2010-3328 CVE-2010-3327 CVE-2010-3326
CVE-2010-3325 CVE-2010-3324 CVE-2010-3243
CVE-2010-0808
Original Bulletin:
http://www.microsoft.com/technet/security/bulletin/MS10-071.mspx
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Microsoft Security Bulletin MS10-071 - Critical
Cumulative Security Update for Internet Explorer (2360131)
Version: 1.0
General Information
Executive Summary
This security update resolves eight privately reported vulnerabilities and two
publicly disclosed vulnerabilities in Internet Explorer. The most severe
vulnerabilities could allow remote code execution if a user views a specially
crafted Web page using Internet Explorer. Users whose accounts are configured
to have fewer user rights on the system could be less impacted than users who
operate with administrative user rights.
This security update is rated Critical for Internet Explorer 6, Internet
Explorer 7, and Internet Explorer 8 on Windows clients; and Important for
Internet Explorer 6, Internet Explorer 7, and Internet Explorer 8 on Windows
servers. For more information, see the subsection, Affected and Non-Affected
Software, in this section. The security update addresses these vulnerabilities
by modifying the way that Internet Explorer handles objects in memory, CSS
special characters, HTML sanitization, the AutoComplete feature, the Anchor
element, and script during certain processes. For more information about the
vulnerabilities, see the Frequently Asked Questions (FAQ) subsection under the
next section, Vulnerability Information.
Affected Software
Windows XP Professional x64 Edition Service Pack 2
Windows XP Service Pack 3
Windows Vista Service Pack 1 and Windows Vista Service Pack 2
Windows Vista x64 Edition Service Pack 1 and Windows Vista x64 Edition Service
Pack 2
Windows 7 for 32-bit Systems
Windows 7 for x64-based Systems
Windows Server 2003 Service Pack 2
Windows Server 2003 with SP2 for Itanium-based Systems
Windows Server 2003 x64 Edition Service Pack 2
Windows Server 2008 for 32-bit Systems and Windows Server 2008 for 32-bit
Systems Service Pack 2
Windows Server 2008 for Itanium-based Systems and Windows Server 2008 for
Itanium-based Systems Service Pack 2
Windows Server 2008 for x64-based Systems and Windows Server 2008 for
x64-based Systems Service Pack 2
Windows Server 2008 R2 for Itanium-based Systems Windows Server 2008 R2
for x64-based Systems
Vulnerability Information
AutoComplete Information Disclosure Vulnerability - CVE-2010-0808
An information disclosure vulnerability exists that potentially allows form
data within Internet Explorer to be captured via the AutoComplete feature. An
attacker could exploit the vulnerability by constructing a specially crafted
Web page that could allow information disclosure if a user viewed the Web
page. An attacker who successfully exploited this vulnerability could capture
information previously entered into fields after the AutoComplete feature has
been enabled.
HTML Sanitization Vulnerability - CVE-2010-3243
An information disclosure vulnerability exists in the way that the
toStaticHTML API sanitizes HTML, that could allow an attacker to perform
cross-site scripting attacks and run script in the security context of the
logged-on user. An attacker who successfully exploited this vulnerability
could execute a cross-site scripting attack on the user, allowing the attacker
to execute script in the user's security context against a site that is using
the toStaticHTML API.
HTML Sanitization Vulnerability - CVE-2010-3324
An information disclosure vulnerability exists in the way that the
toStaticHTML API sanitizes HTML, that could allow an attacker to perform
cross-site scripting attacks and run script in the security context of the
logged-on user. An attacker who successfully exploited this vulnerability
could execute a cross-site scripting attack on the user, allowing the attacker
to execute script in the user's security context against a site that is using
the toStaticHTML API.
CSS Special Character Information Disclosure Vulnerability - CVE-2010-3325
An information disclosure vulnerability exists in the way that Internet
Explorer processes CSS special characters. An attacker could exploit the
vulnerability by constructing a specially crafted Web page that could allow
information disclosure if a user viewed the Web page. An attacker who
successfully exploited this vulnerability could view content from another
domain or Internet Explorer zone.
Uninitialized Memory Corruption Vulnerability - CVE-2010-3326
A remote code execution vulnerability exists in the way that Internet Explorer
accesses an object that has not been correctly initialized or has been
deleted. An attacker could exploit the vulnerability by constructing a
specially crafted Web page. When a user views the Web page, the vulnerability
could allow remote code execution. An attacker who successfully exploited this
vulnerability could gain the same user rights as the logged-on user. If a user
is logged on with administrative user rights, an attacker who successfully
exploited this vulnerability could take complete control of an affected
system. An attacker could then install programs; view, change, or delete data;
or create new accounts with full user rights.
Anchor Element Information Disclosure Vulnerability - CVE-2010-3327
An information disclosure vulnerability exists in the way that Internet
Explorer improperly handles the Anchor element. This behavior occurs during
user operation when the Anchor element is not removed during content pasting
and editing, potentially revealing Personally Identifiable Information
intended for deletion.
Uninitialized Memory Corruption Vulnerability - CVE-2010-3328
A remote code execution vulnerability exists in the way that Internet Explorer
accesses an object that has not been correctly initialized or has been
deleted. An attacker could exploit the vulnerability by constructing a
specially crafted Web page. When a user views the Web page, the vulnerability
could allow remote code execution. An attacker who successfully exploited this
vulnerability could gain the same user rights as the logged-on user. If a user
is logged on with administrative user rights, an attacker who successfully
exploited this vulnerability could take complete control of an affected
system. An attacker could then install programs; view, change, or delete data;
or create new accounts with full user rights.
Uninitialized Memory Corruption Vulnerability - CVE-2010-3329
A remote code execution vulnerability exists in the way that Internet Explorer
accesses an object that has not been correctly initialized or has been deleted
when a document in an HTML format is opened in Microsoft Word. An attacker
could exploit the vulnerability by convincing the user to open a malicious
Word document. When a user closes the document, the vulnerability could allow
remote code execution. An attacker who successfully exploited this
vulnerability could gain the same user rights as the logged-on user. If a user
is logged on with administrative user rights, an attacker who successfully
exploited this vulnerability could take complete control of an affected
system. An attacker could then install programs; view, change, or delete data;
or create new accounts with full user rights.
Cross-Domain Information Disclosure Vulnerability - CVE-2010-3330
An information disclosure vulnerability exists in Internet Explorer that could
allow script to gain access to information in another domain or Internet
Explorer zone. An attacker could exploit the vulnerability by constructing a
specially crafted Web page that could allow information disclosure if a user
viewed the Web page. An attacker who successfully exploited this vulnerability
could view content from another domain or Internet Explorer zone.
Uninitialized Memory Corruption Vulnerability - CVE-2010-3331
A remote code execution vulnerability exists in the way that Internet Explorer
accesses an object that has not been correctly initialized or has been
deleted. An attacker could exploit the vulnerability by convincing a user to
view a specially crafted Word document. When a user closes the Word document,
the vulnerability could allow remote code execution. An attacker who
successfully exploited this vulnerability could gain the same user rights as
the logged-on user. If a user is logged on with administrative user rights, an
attacker who successfully exploited this vulnerability could take complete
control of an affected system. An attacker could then install programs; view,
change, or delete data; or create new accounts with full user rights.
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