Microsoft KB Archive/266356

= Multiple Calls to AddHeader Cause Heap Corruption in IIS 4.0 and IIS 5.0 =

Article ID: 266356

Article Last Modified on 10/6/2005

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APPLIES TO


 * Microsoft Internet Information Server 4.0
 * Microsoft Internet Information Services 5.0

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This article was previously published under Q266356



SYMPTOMS
Heap corruption may occur in Internet Information Server (IIS) when you call the ISAPI AddHeader support function multiple times while processing a single request in an ISAPI application.



Internet Information Server 4.0
A supported fix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Apply it only to computers that are experiencing this specific problem.

To resolve this problem, contact Microsoft Product Support Services to obtain the fix. 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

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.

The English version of this fix should have the following file attributes or later:

  Date       Time   Version     Size      File name     Platform -  09-07-2000 06:15p 4.2.751.1   330,080   Asp.dll       x86 09-07-2000 06:14p 4.2.751.1  55,904    Httpodbc.dll  x86 09-07-2000 06:14p 4.2.751.1  185,792   Infocomm.dll  x86 09-07-2000 06:14p 4.2.751.1  38,256    Ssinc.dll     x86 09-07-2000 06:15p 4.2.751.1  25,360    Sspifilt.dll  x86 09-07-2000 06:15p 4.2.751.1  229,008   W3svc.dll     x86

Internet Information Server 5.0
A supported fix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Apply it only to computers that are experiencing this specific problem. This fix may receive additional testing. Therefore, if you are not severely affected by this problem, Microsoft recommends that you wait for the next Windows 2000 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the fix. 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

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 typical support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

The English version of this fix should have the following file attributes or later:   Date        Time     Version        Size      File name 5/31/2001   03:32p   5.0.2195.3649  353,040   W3svc.dll



Internet Information Server 4.0
Microsoft has confirmed that this is a problem in Internet Information Server 4.0.

Internet Information Server 5.0
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.

Keywords: kbbug kbfix kbwin2000presp3fix kbqfe kbwin2000sp3fix kbhotfixserver KB266356

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