FIX: An access violation occurs when you use a scanner tool on a Windows CE 5.0-based device after you add a firewall component to the device

View products that this article applies to.

SYMPTOMS

Consider the following scenario. You add a firewall component to a Microsoft Windows CE 5.0-based device. You use a port scanner tool on the device. In this scenario, an access violation occurs. You may receive an error message that resembles the following:

IPv4PacketContext::IPv4PacketContext(IPRcvBuf * 0x00000000) line 130 + 7 bytes

Note The port scanner can be an Nmap utility or a Zenmap application.

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CAUSE

This problem occurs because a TCP/IP packet that is sent from the port scanner only contains the IP header and not the packet data. However, the firewall does not correctly handle a TCP/IP packet that has no packet data.

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RESOLUTION

Software update information

A supported software update is now available from Microsoft as Windows CE 5.0 Platform Builder Monthly Update (March 2008). You can confirm this by scrolling to the "File information" section of this article. The package file name contains the product version, date, Knowledge Base article number, and processor type. The package file name format is:

Product version-yymmdd-kbnnnnnn-processor type

For example: Wincepb50-060503-kb917590-armv4i.msi is the ARMV4i Windows CE 5.0 Platform Builder fix that is documented in KB article 917590 and that is contained in the May 2006 monthly update. To resolve this problem immediately, click the following article number for information about obtaining Windows CE Platform Builder and core operating system software updates:

837392 (http://support.microsoft.com/kb/837392/ ) How to locate core operating system fixes for Microsoft Windows CE Platform Builder products

Prerequisites

This update is supported only if all previously issued updates for this product have also been installed.

Restart requirement

After you apply this software update, you must perform a clean build of the whole platform. To clean the platform, click Clean on the Build menu. To build the platform, click Build Platform on the Build menu. You do not have to restart the computer after you apply this software update.

Update replacement information

This update does not replace a previously released update.

File information

The English version of this software update package has the file attributes or the later file attributes that are listed in the following table.

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File name	File size	Date	Time
Wincepb50-080307-kb949291-armv4i.msi	1,483,776	07-Mar-2008	19:35
Wincepb50-080307-kb949291-mipsii.msi	1,547,776	07-Mar-2008	19:35
Wincepb50-080307-kb949291-mipsii_fp.msi	1,548,288	07-Mar-2008	19:35
Wincepb50-080307-kb949291-mipsiv.msi	1,567,232	07-Mar-2008	19:35
Wincepb50-080307-kb949291-mipsiv_fp.msi	1,567,232	07-Mar-2008	19:35
Wincepb50-080307-kb949291-sh4.msi	1,446,912	07-Mar-2008	19:35
Wincepb50-080307-kb949291-x86.msi	1,336,320	07-Mar-2008	19:35

The English version of this software update package 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 item in Control Panel.

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File name	File size	Date	Time	Path
Windows ce 5.0_update_kb949291.htm	7,548	07-Mar-2008	19:43	080307_kb949291
Ip.lib	1,756,826	05-Mar-2008	17:36	Public\Common\Oak\Lib\Armv4i\Debug
Ip.lib	1,206,262	05-Mar-2008	17:35	Public\Common\Oak\Lib\Armv4i\Retail
Ip.lib	1,751,850	05-Mar-2008	17:36	Public\Common\Oak\Lib\Mipsii\Debug
Ip.lib	1,201,802	05-Mar-2008	17:36	Public\Common\Oak\Lib\Mipsii\Retail
Ip.lib	1,752,092	05-Mar-2008	17:37	Public\Common\Oak\Lib\Mipsii_fp\Debug
Ip.lib	1,202,034	05-Mar-2008	17:37	Public\Common\Oak\Lib\Mipsii_fp\Retail
Ip.lib	1,781,268	05-Mar-2008	17:38	Public\Common\Oak\Lib\Mipsiv\Debug
Ip.lib	1,206,424	05-Mar-2008	17:38	Public\Common\Oak\Lib\Mipsiv\Retail
Ip.lib	1,781,508	05-Mar-2008	17:39	Public\Common\Oak\Lib\Mipsiv_fp\Debug
Ip.lib	1,206,656	05-Mar-2008	17:39	Public\Common\Oak\Lib\Mipsiv_fp\Retail
Ip.lib	1,466,922	05-Mar-2008	17:35	Public\Common\Oak\Lib\Sh4\Debug
Ip.lib	1,067,058	05-Mar-2008	17:34	Public\Common\Oak\Lib\Sh4\Retail
Ip.lib	1,398,698	05-Mar-2008	17:34	Public\Common\Oak\Lib\X86\Debug
Ip.lib	1,051,490	05-Mar-2008	17:34	Public\Common\Oak\Lib\X86\Retail

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STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

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MORE INFORMATION

For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:

824684 (http://support.microsoft.com/kb/824684/LN/ ) Description of the standard terminology that is used to describe Microsoft software updates

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REFERENCES

For more information about Nmap, visit the following Nmap Web site:

http://nmap.org/ (http://nmap.org/)

For more information about Zenmap, visit the following Nmap Web site:

http://nmap.org/zenmap/ (http://nmap.org/zenmap/)

Microsoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information.

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.

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