cbcvebase.
CVE-2018-0805
published 2018-01-10

CVE-2018-0805: Equation Editor in Microsoft Office 2003, Microsoft Office 2007, Microsoft Office 2010, Microsoft Office 2013, and Microsoft Office 2016 allows a remote code…

PriorityP258high8.8CVSS 3.0
AVNACLPRNUIRSUCHIHAH
EPSS
24.40%
97.6th percentile
Equation Editor in Microsoft Office 2003, Microsoft Office 2007, Microsoft Office 2010, Microsoft Office 2013, and Microsoft Office 2016 allows a remote code execution vulnerability due to the way objects are handled in memory, aka "Microsoft Word Remote Code Execution Vulnerability". This CVE is unique from CVE-2018-0804, CVE-2018-0806, and CVE-2018-0807

Affected

21 ranges
VendorProductVersion rangeFixed in
microsoftoffice
microsoftoffice
microsoftoffice
microsoftoffice
microsoftword
microsoftword
microsoftword
microsoftword
microsoft_corporationequation_editor
msrcmicrosoft_office_2007_service_pack_3
msrcmicrosoft_office_2010_service_pack_2
msrcmicrosoft_office_2013_service_pack_1
msrcmicrosoft_office_2016
msrcmicrosoft_office_2016_click-to-run_for_32-bit_editions
msrcmicrosoft_office_2016_click-to-run_for_64-bit_editions
msrcmicrosoft_office_compatibility_pack_service_pack_3
msrcmicrosoft_word_2007_service_pack_3
msrcmicrosoft_word_2010_service_pack_2
msrcmicrosoft_word_2013_rt_service_pack_1
msrcmicrosoft_word_2013_service_pack_1
msrcmicrosoft_word_2016

Detection & IOCsextracted from sources · hover to see the quote

  • The vulnerability is triggered when a user opens a specially crafted file with an affected version of Microsoft Office or Microsoft WordPad software; detection should focus on suspicious Office/WordPad document opens, particularly via email attachments or web downloads.
  • The vulnerability resides in Equation Editor functionality; monitor for EQNEDT32.EXE process spawning child processes or exhibiting anomalous memory behavior.
  • Attack vector includes email-delivered specially crafted files; alert on Office/WordPad documents received via email that launch Equation Editor.
  • Web-based delivery is also a vector; monitor for Office/WordPad documents downloaded from the web that invoke Equation Editor.
  • ·CVE-2018-0805 is a distinct vulnerability from CVE-2018-0806, CVE-2018-0807, and CVE-2018-0849, all of which are also Equation Editor RCE bugs in Microsoft Office; ensure detections are not conflated across these CVEs.
  • ·Microsoft's fix removes Equation Editor entirely rather than patching it; patched systems will not have EQNEDT32.EXE present, so its presence post-patch is itself an indicator of an unpatched or tampered system.

CVSS provenance

nvdv3.08.8HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
nvdv2.09.3CRITICALAV:N/AC:M/Au:N/C:C/I:C/A:C
vendor_msrc8.8HIGH
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