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TITLE:
Microsoft Windows HTML Help ActiveX Control Vulnerability

SECUNIA ADVISORY ID:
SA24136

VERIFY ADVISORY:
http://secunia.com/advisories/24136/

CRITICAL:
Highly critical

IMPACT:
System access

WHERE:
>From remote

OPERATING SYSTEM:
Microsoft Windows 2000 Advanced Server
http://secunia.com/product/21/
Microsoft Windows 2000 Datacenter Server
http://secunia.com/product/1177/
Microsoft Windows 2000 Professional
http://secunia.com/product/1/
Microsoft Windows 2000 Server
http://secunia.com/product/20/
Microsoft Windows Server 2003 Datacenter Edition
http://secunia.com/product/1175/
Microsoft Windows Server 2003 Enterprise Edition
http://secunia.com/product/1174/
Microsoft Windows Server 2003 Standard Edition
http://secunia.com/product/1173/
Microsoft Windows Server 2003 Web Edition
http://secunia.com/product/1176/
Microsoft Windows XP Home Edition
http://secunia.com/product/16/
Microsoft Windows XP Professional
http://secunia.com/product/22/

DESCRIPTION:
A vulnerability has been reported in Microsoft Windows, which can be
exploited by malicious people to compromise a user's system.

The vulnerability is caused due to certain parameters not being
properly initialised by the HTML ActiveX control (Hhctrl.ocx) when
handling certain methods.

Successful exploitation allows execution of arbitrary code when a
user e.g. visits a malicious website.

NOTE: Other unspecified issues discovered internally by Microsoft
have also been reported.

SOLUTION:
Apply patches.

Windows 2000 SP4:
http://www.microsoft.com/downloads/details.aspx?FamilyId=211a9c07-88ff-4ae4-a82a-ce2045c6c4fe

Windows XP SP2:
http://www.microsoft.com/downloads/details.aspx?FamilyId=a3700273-d7da-4a60-ba80-c95c8036d670

Windows XP Professional x64 Edition:
http://www.microsoft.com/downloads/details.aspx?FamilyId=69ef4daa-cf0f-4898-8675-911428e7fd74

Windows Server 2003 (optionally with SP1):
http://www.microsoft.com/downloads/details.aspx?FamilyId=5a1f1607-b6ec-41e2-aac0-34387f1211a7

Windows Server 2003 for Itanium-based systems (optionally with SP1):
http://www.microsoft.com/downloads/details.aspx?FamilyId=d638c8e8-5fbe-4a32-945c-440a4b684b0f

Windows Server 2003 x64 Edition:
http://www.microsoft.com/downloads/details.aspx?FamilyId=65bf2245-6c89-43db-8d28-12988791c395

PROVIDED AND/OR DISCOVERED BY:
The vendor credits HD Moore, BreakingPoint Systems.

ORIGINAL ADVISORY:
MS07-008 (KB928843):
http://www.microsoft.com/technet/security/Bulletin/MS07-008.mspx

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

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