Article ID: 324096 - Last Review: March 29, 2007 - Revision: 7.5 MS02-053: Request to SmartHTML Interpreter may monopolize Web server CPU resourcesThis article was previously published under Q324096 On This PageSYMPTOMS
SmartHTML Interpreter (Shtml.dll) is part of FrontPage Server Extensions; it provides support for Web forms and other FrontPage-based dynamic content. The interpreter contains a flaw that occurs when it processes a request for a particular type of Web file if the request includes certain other characteristics. Such a request may cause the interpreter to consume most or all CPU availability until the Web service is restarted. An attacker might be able to use this vulnerability to conduct a denial-of-service attack against an affected Web server.
Mitigating Factors
RESOLUTIONFrontPage 2002 Server Extensions from MicrosoftFor additional information about the security update, click the article number below to view the article in the Microsoft Knowledge Base:329086
(http://support.microsoft.com/kb/329086/EN-US/
)
FP2002: FrontPage 2002 Server Extensions Security Update: September 25, 2002
The English-language version of this fix has the file attributes (or later) that are listed in the following table:
Version File name ------------------------ 10.0.4219.0 Fp5awel.dll 317296
(http://support.microsoft.com/kb/317296/EN-US/
)
Overview of the FrontPage 2002 Server Extension Update: January 28, 2002
FrontPage 2000 Server Extensions from MicrosoftFor additional information about the security update, click the article number below to view the article in the Microsoft Knowledge Base:329085
(http://support.microsoft.com/kb/329085/EN-US/
)
FP2000: FrontPage 2000 Server Extensions Security Update: September 25, 2002
The English-language version of this fix has the file attributes (or later) that are listed in the following table:
Version File name ------------------------ 4.0.2.6426 Fp4awel.dll Windows XPService pack informationTo resolve this problem, obtain the latest service pack for Microsoft Windows XP. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:322389
(http://support.microsoft.com/kb/322389/
)
How to obtain the latest Windows XP service pack
Hotfix informationA supported hotfix is now available from Microsoft, but it is only intended to correct the problem that this article describes. Apply it only to systems that you determine are at risk of attack. Evaluate the computer's physical accessibility, network and Internet connectivity, and other factors to determine the degree of risk to the computer. See the associated Microsoft Security Bulletin (http://www.microsoft.com/technet/security/current.aspx) to help determine the degree of risk. This hotfix may receive additional testing. If the computer is sufficiently at risk, we recommend that you apply this hotfix now.To resolve this problem immediately, download the hotfix by following the instructions later in this article or contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site: http://support.microsoft.com/contactus/?ws=support
(http://support.microsoft.com/contactus/?ws=support)
Note In special cases, charges that are ordinarily incurred for support calls may be canceled, if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question. Download InformationThe following files are available for download from the Microsoft Download Center:
English (US):
Release Date: September 25, 2002Collapse this image  Arabic: Collapse this image Chinese (Simplified): Collapse this image Chinese (Traditional): Collapse this image Czech: Collapse this image Danish: Collapse this image Dutch: Collapse this image Finnish: Collapse this image French: Collapse this image German: Collapse this image Greek: Collapse this image Hebrew: Collapse this image Hungarian: Collapse this image Italian: Collapse this image Japanese: Collapse this image Korean: Collapse this image Norwegian: Collapse this image Polish: Collapse this image Portuguese: Collapse this image Portuguese (Brazil): Collapse this image Russian: Collapse this image Spanish: Collapse this image Swedish: Collapse this image Turkish: Collapse this image For additional information about how to download Microsoft Support files, click the following article number to view the article in the Microsoft Knowledge Base: 119591
(http://support.microsoft.com/kb/119591/EN-US/
)
How to Obtain Microsoft Support Files from Online Services
Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help to prevent any unauthorized changes to the file.
Installation optionsYou must restart your computer after you apply this update. This update supports the following Setup switches:
Q324096_wxp_sp1_x86_enu -u -q -z WARNING: Your computer is vulnerable until you restart it.
File InformationThe English version of this fix has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.Date Time Version Size File name ------------------------------------------------------ 22-Jun-2002 10:37PM 10.0.4219.0 1382984 Fp5awel.dll Windows 2000Service pack informationThe Windows 2000 version of this security patch is included in Windows 2000 Service Pack 4 (SP4) for systems that are running FrontPage 2000 Server Extensions. If you use any other version of FrontPage Server Extensions, you must install the patch for MS02-053 separately. To resolve this problem, obtain the latest service pack for Microsoft Windows 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:260910
(http://support.microsoft.com/kb/260910/
)
How to Obtain the Latest Windows 2000 Service Pack
Hotfix informationA supported hotfix is now available from Microsoft, but it is only intended to correct the problem that this article describes. Apply it only to systems that you determine are at risk of attack. Evaluate your computer's physical accessibility, network and Internet connectivity, and other factors to determine the degree of risk to your computer. See the associated http://www.microsoft.com/technet/security/current.aspx (http://www.microsoft.com/technet/security/current.aspx) to help determine the degree of risk. This hotfix may receive additional testing. If your computer is sufficiently at risk, we recommend that you apply this hotfix now.To resolve this problem immediately, download the hotfix by following the instructions later in this article or contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services phone numbers and information about support costs, visit the following Microsoft Web site: http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS
(http://www.microsoft.com/technet/security/current.aspx)
Note In special cases, charges that are ordinarily incurred for support calls may be canceled, if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question. Download informationThe following file is available for download from the Microsoft Download Center:Collapse this image For additional information about how to download Microsoft Support files, click the following article number to view the article in the Microsoft Knowledge Base: 119591
(http://support.microsoft.com/kb/119591/EN-US/
)
How to Obtain Microsoft Support Files from Online Services
Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help to prevent any unauthorized changes to the file.
Installation optionsYou must restart your computer after you apply this update. This update supports the following Setup switches:
q318138_w2k_sp3_x86_en /q /m /z WARNING: Your computer is vulnerable until you restart it.
File informationThe English version of this fix has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.Date Time Version Size File name and path ------------------------------------------------------------------------ 27-Apr-2002 12:34PM 4.0.2.6426 872557 ???\fp4awel.dll 260910
(http://support.microsoft.com/kb/260910/EN-US/
)
How to obtain the latest Windows 2000 service pack .
STATUSMicrosoft has confirmed that this problem may cause a degree of security vulnerability in the Microsoft products that are listed at the beginning of this article. Windows XPThis problem was first corrected in Windows XP Service Pack 2.Windows 2000This problem was first corrected in Windows 2000 Service Pack 4.MORE INFORMATION
For more information about this vulnerability, visit the following Microsoft Web site:
http://www.microsoft.com/technet/security/bulletin/MS02-053.mspx
(http://www.microsoft.com/technet/security/bulletin/MS02-053.mspx)
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