CVE-2018-8627 — Microsoft Excel Information Disclosure Vulnerability

Executive Summary

An information disclosure vulnerability exists when Microsoft Excel software reads out of bound memory due to an uninitialized variable, which could disclose the contents of memory. An attacker who successfully exploited the vulnerability could view out of bound memory. Exploitation of the vulnerability requires that a user open a specially crafted file with an affected version of Microsoft Excel software. The security update addresses the vulnerability by properly initializing the affected variable.

Overview

Important

MS Severity

Not Exploited

MS Exploit Status

Less Likely

MS Exploit Likelihood

Category Information Disclosure

Released Dec 11 2018

Last Updated Dec 11 2018

Publicly Disclosed No

CISA KEV Not Listed

Known Exploits None Known

EPSS Score

No EPSS score available for this CVE.

View on FIRST.org

Affected Products

19 affected products

Product	KB Article	Severity	Impact	Restart Required
Excel Services on Microsoft SharePoint Server 2010 Service Pack 2	`4461569 (Security Update)`	Important	Information Disclosure	Maybe
Microsoft Excel 2010 Service Pack 2 (32-bit editions)	`4461577 (Security Update)`	Important	Information Disclosure	Maybe
Microsoft Excel 2010 Service Pack 2 (64-bit editions)	`4461577 (Security Update)`	Important	Information Disclosure	Maybe
Microsoft Excel 2013 RT Service Pack 1	`4461559 (Security Update)`	Important	Information Disclosure	Maybe
Microsoft Excel 2013 Service Pack 1 (32-bit editions)	`4461559 (Security Update)`	Important	Information Disclosure	Maybe
Microsoft Excel 2013 Service Pack 1 (64-bit editions)	`4461559 (Security Update)`	Important	Information Disclosure	Maybe
Microsoft Excel 2016 (32-bit edition)	`4461542 (Security Update)`	Important	Information Disclosure	Maybe
Microsoft Excel 2016 (64-bit edition)	`4461542 (Security Update)`	Important	Information Disclosure	Maybe
Microsoft Excel Viewer 2007 Service Pack 3	`4461566 (Security Update)`	Important	Information Disclosure	Maybe
Microsoft Office 2010 Service Pack 2 (32-bit editions)	`4461570 (Security Update)`	Important	Information Disclosure	Maybe
Microsoft Office 2010 Service Pack 2 (64-bit editions)	`4461570 (Security Update)`	Important	Information Disclosure	Maybe
Microsoft Office 2016 for Mac	`Release Notes (Security Update)`	Important	Information Disclosure	No
Microsoft Office 2019 for 32-bit editions	`Click to Run (Security Update)`	Important	Information Disclosure	No
Microsoft Office 2019 for 64-bit editions	`Click to Run (Security Update)`	Important	Information Disclosure	No
Microsoft Office 2019 for Mac	`Release Notes (Security Update)`	Important	Information Disclosure	No
Microsoft Office Compatibility Pack Service Pack 3	`4461565 (Security Update)`	Important	Information Disclosure	Maybe
Microsoft Office Online Server	`4011027 (Security Update)`	Important	Information Disclosure	Maybe
Office 365 ProPlus for 32-bit Systems	`Click to Run (Security Update)`	Important	Information Disclosure	No
Office 365 ProPlus for 64-bit Systems	`Click to Run (Security Update)`	Important	Information Disclosure	No

Patches

10 patches

Article	Type	Restart
`4461569`	Security Update	Maybe
`4461577`	Security Update	Maybe
`4461559`	Security Update	Maybe
`4461542`	Security Update	Maybe
`4461566`	Security Update	Maybe
`4461570`	Security Update	Maybe
`Release Notes`	Security Update	No
`Click to Run`	Security Update	No
`4461565`	Security Update	Maybe
`4011027`	Security Update	Maybe

Known Exploits

No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.

Acknowledgments

Yangkang( @dnpushme

References

MSRC Advisory MITRE NVD