Field Notice: FN - 63320 - Impact of Microsoft Patch MS10-020 (KB980232) on CIFS Optimization in WAAS - Software Upgrade Recommended

Notice

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Revision History

Revision	Publish Date	Comments
1.0	28-May-10	Initial Release
10.0	09-Oct-17	Migration to new field notice system

Products Affected

Affected OS Type	Affected Release	Affected Release Number	Comments
NON-IOS	4.1	4.1.1,4.1.1a,4.1.1b,4.1.1c,4.1.1d,4.1.3,4.1.3a,4.1.3b,4.1.5,4.1.5a,4.1.5b,4.1.5c,4.1.5d,4.1.5e,4.1.5f,4.1.5g,4.1.7,4.1.7a,4.1.7b	All 4.1 Releases
NON-IOS	4	4.0.1,4.0.11,4.0.13,4.0.17,4.0.19,4.0.21,4.0.23,4.0.25,4.0.27,4.0.3,4.0.5,4.0.7,4.0.9	All 4.0 Releases

Defect Information

Defect ID	Headline
CSCtg28040	Software fix will be in version 4.1.5f of the WAAS software once available

Problem Description

When using the new Windows patch (KB980232), our testing has shown that the file "save/save as" operation may not be successful when WAAS CIFS optimization is turned on.

Background

Microsoft published a Windows Operating System patch (KB980232) on April 13, 2010 to address some reported vulnerabilities in SMB clients. As part of the patch, Microsoft updated the manner in which the SMB clients handle SMB responses and validate fields within the SMB response. As a result, the patch requires a related update to the WAAS CIFS optimization for compatibility.

Problem Symptom

When using the new Windows patch, the file save/save-as operation may not be successful when WAAS CIFS optimization is turned on. A pop-up message indicating "There has been a network or file permisson error. The network connection may be lost" is generated by the client.

Workaround/Solution

Customers running 4.1.X WAAS software the preferred option is to upgrade to 4.1.7 WAAS Software. 4.1.7 WAAS Software fixes issues related to CIFA AO as well as WAFS legacy mode configuration pertaining to the Microsoft patch

Customers can also upgrade to 4.1.5f WAAS software if the fix required is ONLY for CIFS AO configuration pertaining to the Microsoft patch

Customers running 4.0.x and do not wish to migrate to 4.1.x software, are recommended to upgrade to version 4.0.27 WAAS software. 4.0.27 WAAS software fixes the CIFS issues related to the WAFS legacy mode configuration pertaining to Microsoft patch.

Additional details:

Microsoft Patch MS10-020 (KB980232)

WAAS Software can be found here:

http://tools.cisco.com/support/downloads/go/Model.x?mdfid=280484571&mdfLevel=Software%20Family&treeName=Application%20Networking%20Services&modelName=Cisco%20Wide%20Area%20Application%20Services%20%28WAAS%29%20Software&treeMdfId=268437639

For More Information

If you require further assistance, or if you have any further questions regarding this field notice, please contact the Cisco Systems Technical Assistance Center (TAC) by one of the following methods:

• Open a service request on Cisco.com
• By email
• By telephone

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