Microsoft Office Memory Corruption Vulnerability

[ Why it matters ]Priority signals

• Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2021-11-03
• EPSS: 97% chance of exploitation in the next 30 days (higher than 100% of CVEs)

[ Description ]Official description

Microsoft Word 2007 SP3, Office 2010 SP2, Word 2010 SP2, Word 2013 SP1, Word 2013 RT SP1, Word for Mac 2011, Office Compatibility Pack SP3, Word Automation Services on SharePoint Server 2010 SP2 and 2013 SP1, and Office Web Apps Server 2010 SP2 and 2013 SP1 allow remote attackers to execute arbitrary code via a crafted RTF document, aka "Microsoft Office Memory Corruption Vulnerability."

CISA: Microsoft Office contains a memory corruption vulnerability due to failure to properly handle rich text format files in memory. Successful exploitation allows for remote code execution in the context of the current user.

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 3 May 2022): Apply updates per vendor instructions.

• Patch on docs.microsoft.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD

[ References ]References

• www.securityfocus.com/bid/73995Broken LinkThird Party AdvisoryVDB Entry
• www.securitytracker.com/id/1032104Broken LinkThird Party AdvisoryVDB Entry
• docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-033PatchVendor Advisory
• www.cisa.gov/known-exploited-vulnerabilities-catalogUS Government Resource