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