Article ID: 817772 - Last Review: November 7, 2007 - Revision: 5.1 MS03-019: Flaw in ISAPI extension for Windows Media Services could cause denial of serviceTechnical UpateJune 25, 2003: The Windows 2000 version of this patch is replaced by the 822343 security patch. For more information about this patch, click the following article number to view the article in the Microsoft Knowledge Base:822343
(http://support.microsoft.com/kb/822343/
)
MS03-022: Flaw in ISAPI extension for Windows Media Services could cause code execution
On This PageSYMPTOMSMicrosoft Windows Media Services is a feature of Microsoft
Windows 2000 Server and is also available as download for Microsoft Windows NT
4.0 Server. Although Windows Media Services supports multicast streaming, there
is no direct communication between the server and the users that the server can
log. To help with this problem, Windows 2000 Server includes logging
capabilities for multicast transmissions and unicast transmissions. This
capability is implemented as an Internet Server API (ISAPI) DLL that is named
Nsiislog.dll. There is a flaw in the way that Nsiislog.dll processes incoming requests. A vulnerability exists that could allow an attacker to send communications to the server that would result in a denial of service of Microsoft Internet Information Services (IIS). The denial of service would only affect IIS, and other services on the server would remain unaffected. RESOLUTIONService pack informationTo resolve this problem, obtain the latest service pack for Microsoft Windows 2000. For more 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 informationSecurity patch informationDownload informationThe following files are available for download from the Microsoft Download Center:Microsoft Windows 2000 (all languages except Japanese NEC) Collapse this image  Collapse this image Collapse this image For more 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/
)
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 prevent any unauthorized changes to the file.
PrerequisitesThis update requires Windows NT 4.0 Server Service Pack 6a. For more information, click the following article number to view the article in the Microsoft Knowledge Base:152734
(http://support.microsoft.com/kb/152734/
)
How to obtain the latest Windows NT 4.0 service pack
Note Microsoft Windows Media Services 4.1 is included with Windows
2000 Server Service Pack 2 or Windows 2000 Server Service Pack 3.Installation informationThis patch supports the following Setup switches:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\Windows Media Services\wm817772 Deployment informationTo install the patch without any user intervention, type the following command at a command prompt:WindowsMedia41-KB817772-x86-ENU /q:a /r:n For additional information about how to deploy this patch with Microsoft Software Update Services, visit the following Microsoft Web site: http://technet.microsoft.com/en-us/wsus/bb466201.aspx
(http://technet.microsoft.com/en-us/wsus/bb466201.aspx)
Restart requirementYou do not have to restart your computer after you apply this patch.Removal informationYou cannot remove this patch because the Setup technology does not allow for removal and because there is no system-level rollback feature in Microsoft Windows 2000 and Microsoft Windows NT 4.0.Patch replacement informationThis patch does not replace any other hotfixes.The Windows 2000 version of this patch is replaced by the 822343 security patch. For more information about this patch, click the following article number to view the article in the Microsoft Knowledge Base: 822343
(http://support.microsoft.com/kb/822343/
)
MS03-022: Flaw in ISAPI extension for Windows Media Services could cause code execution
File informationThe English version of this hotfix has the file attributes (or later file attributes) 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.Windows 2000 Date Time Version Size File Name ------------------------------------------------------- 07-Mar-2003 16:40 4.1.0.3931 16,784 Nsiislog.dll 02-Apr-2003 23:27 6.0.2600.0 144,384 Nsisapi.exe 19-May-2003 18:38 6.0.2600.0 122,880 Nsisapi2.exe Date Time Version Size File Name ------------------------------------------------------- 01-Apr-2003 19:04 4.1.0.3861 15,760 Nsiislog.dll 20-May-2003 15:37 6.0.2600.0 122,368 Nsisapi2.exe STATUS
Microsoft has confirmed that this problem may cause a degree of security vulnerability in the Microsoft products that are listed in the "Applies to" section.
This problem was first corrected in Microsoft 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/MS03-019.mspx
(http://www.microsoft.com/technet/security/bulletin/MS03-019.mspx)
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