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CVE-2009-3129 is a memory corruption vulnerability in Microsoft Excel spreadsheet processing. A specially crafted FEATHEADER record contains an invalid cbHdrData size element that is subsequently used as a pointer offset, enabling arbitrary code execution when the spreadsheet is opened. Affected products include Excel 2002 SP3, Excel 2003 SP3, Excel 2007 SP1 and SP2, Office 2004 and 2008 for Mac, Open XML File Format Converter for Mac, Excel Viewer 2003 SP3, Excel Viewer SP1 and SP2, and Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats SP1 and SP2. Microsoft addressed the vulnerability in security bulletin MS09-067.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos (1 hidden).
This repository contains a single Metasploit module (ms09_067_excel_featheader.rb) that exploits CVE-2009-3129, a vulnerability in Microsoft Excel's handling of the FEATHEADER record. The exploit generates a malicious Excel (.xls) file that, when opened in a vulnerable version of Microsoft Office (XP/2002, 2003, or 2007 on Windows XP SP3), allows for arbitrary code execution. The module allows the attacker to specify the output file name and path, and embeds a user-selected Metasploit payload (up to 1024 bytes, with null bytes filtered out) into the crafted Excel file. The attack vector is local, requiring social engineering to convince a user to open the malicious file. The main fingerprintable endpoint is the generated Excel file itself. The code is mature and weaponized, as it is part of the Metasploit framework and supports customizable payloads.
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14 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An Important-rated Featheader record memory corruption vulnerability in Excel file parsing. A user must open a crafted spreadsheet to trigger arbitrary code execution with their privileges. MS09-067 supplies parsing fixes; workarounds include Office File Block policy, MOICE, and avoiding untrusted files. Excel 2007 requires both KB973593 and KB973704 for bulletin coverage. Microsoft reported no observed attacks or published proof-of-concept code as of November 10, 2009.
Observed example where an invalid size field in a spreadsheet record is later used as an offset.
Unknown (only referenced via an AV detection name; the content does not describe the vulnerability details or usage).
Unknown (only referenced via an AV detection name; the content does not describe the vulnerability details or usage).
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Every observed campaign linking this CVE to a named adversary.
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Cross-references every affected SKU, including bundled OEM variants.
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