Signature Detail

HTTP: Microsoft Excel Malformed CF BIFF Record

This signature detects attempts to exploit a known flaw in Microsoft Excel. A successful attack could result in arbitrary code execution.

Extended Description

Microsoft Excel is prone to a remote code-execution vulnerability. Attackers could exploit this issue by enticing victims to open a maliciously crafted Excel file. Successful exploits will allow attackers to execute arbitrary code with the privileges of the user running the application.

Affected Products

• Microsoft Excel 2003 SP1
• Microsoft Excel 2003 SP2
• Microsoft Excel 2003 SP3
• Microsoft Excel 2003
• Microsoft Excel 2007 SP1
• Microsoft Excel 2007 SP2
• Microsoft Excel 2007
• Microsoft Excel 2010
• Microsoft Excel Services installed on Microsoft Office SharePoint Server 2 SP1
• Microsoft Excel Services installed on Microsoft Office SharePoint Server 2 SP2
• Microsoft Excel Services installed on Microsoft Office SharePoint Server 2
• Microsoft Excel Viewer SP2
• Microsoft Excel Web App
• Microsoft Office 2004 for Mac
• Microsoft Office 2008 for Mac
• Microsoft Office 2011 for Mac SP1
• Microsoft Office 2011 for Mac
• Microsoft Office Compatibility Pack 2007 SP1
• Microsoft Office Compatibility Pack 2007 SP2
• Microsoft Office Compatibility Pack 2007
• Microsoft Open Xml File Format Converter Mac

References

• BugTraq: 49518
• CVE: CVE-2011-1989