Microsoft Excel Featheader Record Memory Corruption Vulnerability (CVE-2009-3129)
Severity: high · Patch status: patched · Since 2022-03-03 · CVE-2009-3129
Microsoft Office Excel 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. CISA added CVE-2009-3129 to its Known Exploited Vulnerabilities catalog on Mar 3, 2022, which means attackers are exploiting it in the wild.
What to do
- Apply updates per vendor instructions.
- US federal agencies must remediate by Mar 24, 2022 (BOD 22-01); treat that as the outer limit.
Sources
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