CVE-2009-3129

CVE-2009-3129 is a high-severity (CVSS 7.8) vulnerability in Microsoft Excel. CISA added it to the Known Exploited Vulnerabilities catalog on March 3, 2022, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by March 24, 2022. CISA does not currently list it as used in ransomware campaigns. Microsoft has 390 vulnerabilities in the KEV catalog, 117 of them linked to ransomware.

Microsoft Office Excel 2002 SP3, 2003 SP3, and 2007 SP1 and SP2; Office 2004 and 2008 for Mac; Open XML File Format Converter for Mac; Office Excel Viewer 2003 SP3; Office Excel Viewer SP1 and SP2; and Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats SP1 and SP2 allows remote attackers to execute arbitrary code via a spreadsheet with a FEATHEADER record containing an invalid cbHdrData size element that affects a pointer offset, aka "Excel Featheader Record Memory Corruption Vulnerability."

CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

• http://archives.neohapsis.com/archives/bugtraq/2009-11/0080.html
• http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=832
• http://osvdb.org/59860
• http://www.exploit-db.com/exploits/14706
• http://www.securityfocus.com/bid/36945
• http://www.securitytracker.com/id?1023157
• http://www.us-cert.gov/cas/techalerts/TA09-314A.html
• http://www.zerodayinitiative.com/advisories/ZDI-09-083