Microsoft Office Remote Code Execution Vulnerability

[ Why it matters ]Priority signals

• Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2022-03-03
• EPSS: 81% chance of exploitation in the next 30 days (higher than 100% of CVEs)

[ Description ]Official description

Microsoft Office 2010, SharePoint Enterprise Server 2010, SharePoint Server 2010, Web Applications, Office Web Apps Server 2010 and 2013, Word Viewer, Word 2007, 2010, 2013 and 2016, Word Automation Services, and Office Online Server allow remote code execution when the software fails to properly handle objects in memory.

CISA: A remote code execution vulnerability exists in Microsoft Office software when the software fails to properly handle objects in memory. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the current user.

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 24 Mar 2022): Apply updates per vendor instructions.

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

[ References ]References

• www.securityfocus.com/bid/101219Broken LinkThird Party AdvisoryVDB Entry
• www.securitytracker.com/id/1039541Broken LinkThird Party AdvisoryVDB Entry
• 0patch.blogspot.com/2017/11/0patching-pretty-nasty-microsoft-word.htmlExploit
• portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11826PatchVendor Advisory
• securingtomorrow.mcafee.com/mcafee-labs/analyzing-microsoft-office-zero-day-exploit-cve…Broken LinkTechnical DescriptionThird Party Advisory
• www.tarlogic.com/en/blog/exploiting-word-cve-2017-11826ExploitThird Party Advisory
• www.cisa.gov/known-exploited-vulnerabilities-catalogUS Government Resource