CVE-2011-1987

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CVE

Array index error in Microsoft Excel 2003 SP3 and 2007 SP2; Excel in Office 2007 SP2; Excel 2010 Gold and SP1; Excel in

Array index error in Microsoft Excel 2003 SP3 and 2007 SP2.

Excel in Office 2007 SP2.

Excel 2010 Gold and SP1.

Excel in Office 2010 Gold and SP1.

Office 2004, 2008, and 2011 for Mac.

Open XML File Format Converter for Mac.

Excel Viewer SP2.

and Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats SP2 allows remote attackers to execute arbitrary code via a crafted spreadsheet, aka "Excel Out of Bounds Array Indexing Vulnerability.".

HIGH · CVSS 9.3 EPSS 0.6115

Act now

EPSS ≥ 0.50 - high probability of exploitation in the next 30 days
EPSS percentile: top 2% of all CVEs by exploitation likelihood
CVSS base score ≥ 7.0

Sigma rules13 YARA rules0

⬡

Weakness Classification

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer

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Affected Products & Versions

microsoft excelall versions
microsoft excel viewerall versions
microsoft officeall versions
microsoft office compatibility packall versions
microsoft open xml file format converterall versions

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Sigma Hunt Rules

Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.

producthighPython Function Execution Security Warning Disabled In Excel

producthighPotential Excel.EXE DCOM Lateral Movement Via ActivateMicrosoftApp

producthighPotential Persistence Via Excel Add-in - Registry

producthighPython Function Execution Security Warning Disabled In Excel - Registry

productmediumMicrosoft Excel Add-In Loaded From Uncommon Location

producthighSuspicious Microsoft Office Child Process - MacOS

Show all 13 top matchesproducthighCode Executed Via Office Add-in XLL File
producthighPotential Persistence Via Microsoft Office Add-In
producthighPotential Persistence Via Microsoft Office Startup Folder
producthighFile With Uncommon Extension Created By An Office Application
producthighOffice Macro File Creation From Suspicious Process
producthighUncommon File Created In Office Startup Folder
producthighPotentially Suspicious Office Document Executed From Trusted Location

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Scoring & Timeline

9.3

HIGH · CVSS v2 (legacy) · secure@microsoft.com

View on NVD

This CVE predates CVSS v3; the legacy v2 score is shown so triage still has a severity to work with.

v2 Vector

AV:N/AC:M/Au:N/C:C/I:C/A:C

Published to NVD15 Sep 2011 · 12:26 PM

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References & Sources

Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.

http://www.us-cert.gov/cas/techalerts/TA11-256A.htmlUS Government Resource

https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-072

https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12953

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