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AL-2006.0045 -- [Win] -- MS06-021,022,023 - Multiple vulnerabilities in Internet Explorer may allow remote compromise

Date: 14 June 2006

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===========================================================================
A  U  S  C  E  R  T                                           A  L  E  R  T

                       AL-2006.0045 -- AUSCERT ALERT
                                   [Win]
          MS06-021,022,023 - Multiple vulnerabilities in Internet
                   Explorer may allow remote compromise
                               14 June 2006

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

        AusCERT Alert Summary
        ---------------------

Product:              Internet Explorer 6 SP1 and prior
                      Internet Explorer 5.01 SP4 and prior
Operating System:     Windows
Impact:               Execute Arbitrary Code/Commands
                      Access Confidential Data
                      Provide Misleading Information
Access:               Remote/Unauthenticated
CVE Names:            CVE-2006-2218 CVE-2006-2382 CVE-2006-2383
                      CVE-2006-1303 CVE-2006-4089 CVE-2006-2384
                      CVE-2006-2385 CVE-2006-1626 CVE-2006-2378
                      CVE-2006-1313

Original Bulletin:    
  http://www.microsoft.com/technet/security/Bulletin/MS06-021.mspx
  http://www.microsoft.com/technet/security/Bulletin/MS06-022.mspx
  http://www.microsoft.com/technet/security/Bulletin/MS06-023.mspx

Comment: Three Microsoft bulletins describe vulnerabilities allowing a
         remote attacker to compromise a user's computer if the user
         visits a malicious web site.

- --------------------------BEGIN INCLUDED TEXT--------------------

MS06-021 - Cumulative Security Update for Internet Explorer (916281)

Affected Software:
	- Microsoft Windows 2000 Service Pack 4
	- Microsoft Windows XP Service Pack 1 
	  and Microsoft Windows XP Service Pack 2
	- Microsoft Windows XP Professional x64 Edition
	- Microsoft Windows Server 2003 
	  and Microsoft Windows Server 2003 Service Pack 1
	- Microsoft Windows Server 2003 for Itanium-based Systems 
	  and Microsoft Windows Server 2003 with SP1 for Itanium-based Systems
	- Microsoft Windows Server 2003 x64 Edition
	- Microsoft Windows 98, Microsoft Windows 98 Second Edition (SE), 
	  and Microsoft Windows Millennium Edition (Me)

Affected Components:
	- Internet Explorer 5.01 Service Pack 4 on Microsoft Windows 2000 Service Pack 4
	- Internet Explorer 6 Service Pack 1 on Microsoft Windows 2000 Service Pack 4 
	  or on Microsoft Windows XP Service Pack 1
	- Internet Explorer 6 for Microsoft Windows XP Service Pack 2
	- Internet Explorer 6 for Microsoft Windows Server 2003 
	  and Microsoft Windows Server 2003 Service Pack 1
	- Internet Explorer 6 for Microsoft Windows Server 2003 for Itanium-based 
	  Systems and Microsoft Windows Server 2003 with SP1 for Itanium-based Systems
	- Internet Explorer 6 for Microsoft Windows Server 2003 x64 Edition
	- Internet Explorer 6 for Microsoft Windows XP Professional x64 Edition
	- Internet Explorer 6 Service Pack 1 on Microsoft Windows 98, 
	  on Microsoft Windows 98 SE, or on Microsoft Windows Millennium Edition

Full MS06-021 advisory:
http://www.microsoft.com/technet/security/Bulletin/MS06-021.mspx

Vulnerability Details

Exception Handling Memory Corruption Vulnerability - CVE-2006-2218

	A remote code execution vulnerability exists in the way Internet
	Explorer handles exceptional conditions. As a result, system
	memory may be corrupted in such a way that an attacker could
	execute arbitrary code if a user visited a specially crafted Web
	site. An attacker who successfully exploited this vulnerability
	could take complete control of an affected system.

HTML Decoding Memory Corruption Vulnerability - CVE-2006-2382

	A remote code execution vulnerability exists in the way Internet
	Explorer decodes specially crafted UTF-8 encoded HTML. An attacker
	could exploit the vulnerability by constructing a specially
	crafted Web page that could potentially allow remote code execution
	if a user visited the specially crafted Web site. An attacker
	who successfully exploited this vulnerability could take complete
	control of an affected system.

ActiveX Control Memory Corruption Vulnerability - CVE-2006-2383

	A remote code execution vulnerability exists in the
	DXImageTransform.Microsoft.Light ActiveX control if passed
	unexpected data. An attacker could exploit the vulnerability by
	constructing a specially crafted Web page that could potentially
	allow remote code execution if a user visited the specially
	crafted Web site. An attacker who successfully exploited this
	vulnerability could take complete control of an affected system.

COM Object Instantiation Memory Corruption Vulnerability - CVE-2006-1303

	A remote code execution vulnerability exists in the way Internet
	Explorer instantiates COM objects that are not intended to be
	instantiated in Internet Explorer. An attacker could exploit the
	vulnerability by constructing a specially crafted Web page that
	could potentially allow remote code execution if a user visited
	the specially crafted Web site. An attacker who successfully
	exploited this vulnerability could take complete control of an
	affected system.

CSS Cross-Domain Information Disclosure Vulnerability - CVE-2005-4089

	An information disclosure vulnerability exists in Internet
	Explorer because it incorrectly interprets a specially crafted
	document as a cascading style sheet (CSS). An attacker could
	exploit the vulnerability by constructing a specially crafted
	Web page that could potentially lead to information disclosure
	if a user visited a specially crafted Web site or clicked a link
	in a specially crafted e-mail message. An attacker who successfully
	exploited this vulnerability could read file data from another
	Internet Explorer domain. However, user interaction is required
	to exploit this vulnerability.

Address Bar Spoofing Vulnerability - CVE-2006-2384

	A spoofing vulnerability exists in Internet Explorer that could
	allow an attacker to display spoofed content in a browser window.
	The address bar and other parts of the trust UI can be displayed
	from trusted Web sites but the content of the window contains
	the attackers Web page.

MHT Memory Corruption Vulnerability - CVE-2006-2385

	A remote code execution vulnerability exists in the way Internet
	Explorer saves multipart HTML (.mht) files. An attacker could
	exploit the vulnerability by constructing a specially crafted
	Web page and convince a user to save this Web page as a multipart
	HTML file that could potentially allow remote code execution.
	An attacker who successfully exploited this vulnerability could
	take complete control of an affected system however significant
	user interaction is required.

Address Bar Spoofing Vulnerability - CVE-2006-1626

	A spoofing vulnerability exists in Internet Explorer that could
	allow an attacker to display spoofed content in a browser window.
	The address bar and other parts of the trust UI can be displayed
	from trusted Web sites but the content of the window contains
	the attackers Web page.

- -----------------------------------------------------------------

MS06-022 - Vulnerability in ART Image Rendering Could Allow Remote 
Code Execution (918439)

Affected Software:
	- Microsoft Windows XP Service Pack 1  
	- Microsoft Windows XP Service Pack 2  
	- Microsoft Windows XP Professional x64 Edition  
	- Microsoft Windows Server 2003 and Microsoft Windows Server 2003 Service Pack 1 
	- Microsoft Windows Server 2003 for Itanium-based Systems 
	  and Microsoft Windows Server 2003 with SP1 for Itanium-based Systems  
	- Microsoft Windows Server 2003 x64 Edition  
	- Microsoft Windows 98, Microsoft Windows 98 Second Edition (SE), 
	  and Microsoft Windows Millennium Edition (Me)

Affected Components:
	- Windows 2000 with the Windows 2000 AOL Image Support Update installed
	- Internet Explorer 5.01 Service Pack 4 on Microsoft Windows 2000 Service Pack 4  
	- Internet Explorer 6 Service Pack 1 on Microsoft Windows 2000 Service Pack 4  

Full MS06-022 advisory:
http://www.microsoft.com/technet/security/Bulletin/MS06-022.mspx

Vulnerability Details

ART Image Rendering Vulnerability - CVE-2006-2378

	There is a remote code execution vulnerability in the way that
	Windows handles ART images. An attacker could exploit the
	vulnerability by constructing a specially crafted ART image that
	could potentially allow remote code execution if a user visited
	a Web site or viewed a specially crafted e-mail message. An
	attacker who successfully exploited this vulnerability could
	take complete control of an affected system.

- -----------------------------------------------------------------

MS06-023 - Vulnerability in Microsoft JScript Could Allow Remote 
Code Execution (917344)

Affected Software:
	- Microsoft Windows 2000 Service Pack 4
	- Microsoft Windows XP Service Pack 1 and Microsoft Windows XP Service Pack 2
	- Microsoft Windows XP Professional x64 Edition
	- Microsoft Windows Server 2003 and Microsoft Windows Server 2003 Service Pack 1
	- Microsoft Windows Server 2003 for Itanium-based Systems 
	  and Microsoft Windows Server 2003 with SP1 for Itanium-based Systems
	- Microsoft Windows Server 2003 x64 Edition
	- Microsoft Windows 98, Microsoft Windows 98 Second Edition (SE), 
	  and Microsoft Windows Millennium Edition (Me)

Affected Components:
	- Microsoft JScript 5.1 on Microsoft Windows 2000 Service Pack 4  
	- Microsoft JScript 5.6 and 5.5 when installed on Windows 2000 Service Pack 4  
	- Microsoft JScript 5.6 on Microsoft Windows XP Service Pack 1 
	  and Microsoft Windows XP Service Pack 2  
	- Microsoft JScript 5.6 on Microsoft Windows XP Professional x64 Edition  
	- Microsoft JScript 5.6 on Microsoft Windows Server 2003 
	  and Microsoft Windows Server 2003 Service Pack 1  
	- Microsoft JScript 5.6 on Microsoft Windows Server 2003 for Itanium-based Systems 
	  and Microsoft Windows Server 2003 with SP1 for Itanium-based Systems  
	- Microsoft JScript 5.6 on Microsoft Windows Server 2003 x64 Edition  
	- Microsoft JScript 5.6 on Microsoft Windows 98, Microsoft Windows 98 Second 
	  Edition (SE), and Microsoft Windows Millennium Edition (Me)

Full MS06-023 advisory:
http://www.microsoft.com/technet/security/Bulletin/MS06-023.mspx

Vulnerability Details

Microsoft JScript Memory Corruption Vulnerability - CVE-2006-1313

	There is a remote code execution vulnerability in JScript. An
	attacker could exploit the vulnerability by constructing specially
	crafted JScript that could potentially allow remote code execution
	if a user visited a Web site or viewed a specially crafted e-mail
	message. An attacker who successfully exploited this vulnerability
	could take complete control of an affected system.


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        http://www.auscert.org.au/render.html?cid=1980

If you believe that your computer system has been compromised or attacked in 
any way, we encourage you to let us know by completing the secure National IT 
Incident Reporting Form at:

        http://www.auscert.org.au/render.html?it=3192

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
===========================================================================

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