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Internet Explorer Three Vulnerabilities
Secunia Advisory: SA16373
Release Date: 2005-08-09
Last Update: 2005-11-21
Popularity: 34,778 views

Critical:
Highly critical
Impact: Cross Site Scripting
DoS
System access
Where: From remote
Solution Status: Vendor Patch

Software:Microsoft Internet Explorer 5.01
Microsoft Internet Explorer 5.5
Microsoft Internet Explorer 6.x

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CVE reference:CVE-2005-1988
CVE-2005-1989
CVE-2005-1990
CVE-2005-2308


Description:
Three vulnerabilities have been reported in Internet Explorer, which can be exploited by malicious people to conduct cross-site scripting attacks, to cause a DoS (Denial of Service), or compromise a user's system.

1) A memory corruption error within the processing of JPEG images can be exploited to crash the browser or to execute arbitrary code by tricking a user into e.g. visiting a web site or view an HTML e-mail containing a specially crafted JPEG image.

2) A validation error during the interpretation of certain URLs when browsing from a web site to a web folder view using WebDAV can be exploited to execute arbitrary script code in another domain (e.g. on the user's system in the "Local Machine" security zone).

3) An error in the way COM objects are instantiated as ActiveX controls can be exploited to corrupt system memory and allows execution of arbitrary code on a user's system when e.g. a malicious web site is visited.

Solution:
Apply patches.

Internet Explorer 5.01 (requires SP4) on Windows 2000 SP4:
http://www.microsoft.com/downloads/de...=194E0EE7-919C-4A8B-AD8D-01A4FE771942

Internet Explorer 6 (requires SP1) on Windows 2000 SP4 or Windows XP SP1:
http://www.microsoft.com/downloads/de...=68300B15-1CF9-45FB-875E-2EF6D2FBC9ED

Internet Explorer 6 for Windows XP SP2:
http://www.microsoft.com/downloads/de...=648B6F0E-1695-44E5-826A-43406DF4858E

Internet Explorer 6 for Windows Server 2003 (optionally with SP1):
http://www.microsoft.com/downloads/de...=F0B96EC3-E954-423A-9AB0-5712B9F14637

Internet Explorer 6 for Windows Server 2003 for Itanium-based systems (optionally with SP1):
http://www.microsoft.com/downloads/de...=C24D3738-213A-41B8-84A3-2842B34D7B10

Internet Explorer 6 for Windows Server 2003 x64 Edition:
http://www.microsoft.com/downloads/de...=F2D544E7-33F5-4A65-A574-15495B05B883

Internet Explorer 6 for Microsoft Windows XP Professional x64 Edition:
http://www.microsoft.com/downloads/de...=1181BC67-0A1D-4A06-99AC-5B2BC6DFE0F6

Internet Explorer 5.5 (requires SP2) on Windows ME:
Patches are available from the Windows Update web site.

NOTE: See vendor advisory for Slovenian and Slovakian patches for Windows ME.

Internet Explorer 6 (requires SP1) on Windows 98, Windows 98 SE, or Windows ME:
Patches are available from the Windows Update web site.

NOTE: See vendor advisory for Slovenian and Slovakian patches for Windows ME.

Microsoft Windows XP Embedded (with SP2):
http://www.microsoft.com/downloads/de...=9da5dae9-9e2d-45ef-8c9b-d773409b6187

Microsoft Windows XP Embedded (with SP1):
http://www.microsoft.com/downloads/de...=8f1f7ae2-8e47-4055-9f55-aef72d8ea60d

Provided and/or discovered by:
1) Michal Zalewski
2) Paul, GreyHat Security.
3) The vendor credits the following people:
* NSFOCUS Security Team
* Bernhard Mueller and Martin Eiszner, SEC Consult.

Changelog:
2005-08-10: Added link to US-CERT vulnerability notes.
2005-08-11: Vendor issues updated packages as prior packages introduced various errors.
2005-08-22: Added link to US-CERT vulnerability note.
2005-08-30: Updated credits.
2005-09-28: Added CVE reference. Updated "Impact" and "Description" sections.
2005-11-21: Added patch information for Windows XP Embedded.

Original Advisory:
MS05-038 (KB896727):
http://www.microsoft.com/technet/security/Bulletin/MS05-038.mspx

NSFOCUS:
http://www.nsfocus.com/english/homepage/research/0502.htm

Other References:
Known problems when installing the cumulative update:
http://support.microsoft.com/kb/896727

US-CERT VU#965206:
http://www.kb.cert.org/vuls/id/965206

US-CERT VU#959049:
http://www.kb.cert.org/vuls/id/959049

US-CERT VU#680526:
http://www.kb.cert.org/vuls/id/680526


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