Rule Category

FILE-OFFICE -- Snort detected traffic targeting vulnerabilities in files belonging to the Microsoft Office suite of software (Excel, PowerPoint, Word, Visio, Access, Outlook, etc.).

Alert Message

FILE-OFFICE Microsoft Office Word CoCreateInstance elevation of privilege attempt

Rule Explanation

Microsoft Access 2007 SP3, Excel 2007 SP3, InfoPath 2007 SP3, OneNote 2007 SP3, PowerPoint 2007 SP3, Project 2007 SP3, Publisher 2007 SP3, Visio 2007 SP3, Word 2007 SP3, Office 2007 IME (Japanese) SP3, Access 2010 SP2, Excel 2010 SP2, InfoPath 2010 SP2, OneNote 2010 SP2, PowerPoint 2010 SP2, Project 2010 SP2, Publisher 2010 SP2, Visio 2010 SP2, Word 2010 SP2, Pinyin IME 2010, Access 2013 SP1, Excel 2013 SP1, InfoPath 2013 SP1, OneNote 2013 SP1, PowerPoint 2013 SP1, Project 2013 SP1, Publisher 2013 SP1, Visio 2013 SP1, Word 2013 SP1, Excel 2013 RT SP1, OneNote 2013 RT SP1, PowerPoint 2013 RT SP1, Word 2013 RT SP1, Access 2016, Excel 2016, OneNote 2016, PowerPoint 2016, Project 2016, Publisher 2016, Visio 2016, Word 2016, Skype for Business 2016, and Lync 2013 SP1 allow remote attackers to bypass a sandbox protection mechanism and gain privileges via a crafted web site that is accessed with Internet Explorer, as demonstrated by a transition from Low Integrity to Medium Integrity, aka "Microsoft Office Elevation of Privilege Vulnerability." Impact: CVSS base score 9.3 CVSS impact score 10.0 CVSS exploitability score 8.6 confidentialityImpact COMPLETE integrityImpact COMPLETE availabilityImpact COMPLETE Details: Ease of Attack:

What To Look For

Known Usage

No public information

False Positives

No known false positives

Contributors

Talos research team. This document was generated from data supplied by the national vulnerability database, a product of the national institute of standards and technology. For more information see [nvd].

MITRE ATT&CK Framework

Tactic:

Technique:

For reference, see the MITRE ATT&CK vulnerability types here: https://attack.mitre.org

CVE

Additional Links

Rule Vulnerability

CVE Additional Information

CVE-2015-2503
Microsoft Access 2007 SP3, Excel 2007 SP3, InfoPath 2007 SP3, OneNote 2007 SP3, PowerPoint 2007 SP3, Project 2007 SP3, Publisher 2007 SP3, Visio 2007 SP3, Word 2007 SP3, Office 2007 IME (Japanese) SP3, Access 2010 SP2, Excel 2010 SP2, InfoPath 2010 SP2, OneNote 2010 SP2, PowerPoint 2010 SP2, Project 2010 SP2, Publisher 2010 SP2, Visio 2010 SP2, Word 2010 SP2, Pinyin IME 2010, Access 2013 SP1, Excel 2013 SP1, InfoPath 2013 SP1, OneNote 2013 SP1, PowerPoint 2013 SP1, Project 2013 SP1, Publisher 2013 SP1, Visio 2013 SP1, Word 2013 SP1, Excel 2013 RT SP1, OneNote 2013 RT SP1, PowerPoint 2013 RT SP1, Word 2013 RT SP1, Access 2016, Excel 2016, OneNote 2016, PowerPoint 2016, Project 2016, Publisher 2016, Visio 2016, Word 2016, Skype for Business 2016, and Lync 2013 SP1 allow remote attackers to bypass a sandbox protection mechanism and gain privileges via a crafted web site that is accessed with Internet Explorer, as demonstrated by a transition from Low Integrity to Medium Integrity, aka "Microsoft Office Elevation of Privilege Vulnerability."
Details
SeverityHIGH Base Score9.3
Impact Score10.0 Exploit Score8.6
Confidentiality ImpactCOMPLETE Integrity ImpactCOMPLETE
Availability ImpactCOMPLETE Access Vector
AuthenticationNONE Ease of Access