CVE-2018-8247 — Microsoft Office Elevation of Privilege Vulnerability

Executive Summary

An elevation of privilege vulnerability exists when Office Web Apps Server 2013 and Office Online Server fail to properly handle web requests. An attacker who successfully exploited this vulnerability could perform script/content injection attacks and attempt to trick the user into disclosing sensitive information. To exploit the vulnerability, an attacker could send an email message containing a malicious link to a user. Alternatively, an attacker could use a chat client to social engineer a user into clicking the malicious link. The user must click the malicious link for the vulnerability to be exploited. The security update addresses the vulnerability by correcting how Office Web Apps Server 2013 and Office Online Server validate web requests.

Overview

Important

MS Severity

Not Exploited

MS Exploit Status

Less Likely

MS Exploit Likelihood

Category Elevation of Privilege

Released Jun 12 2018

Last Updated Jun 12 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

2 affected products

Product	KB Article	Severity	Impact	Restart Required
Microsoft Office Online Server 2016	`4011026 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft Office Web Apps Server 2013 Service Pack 1	`4022183 (Security Update)`	Important	Elevation of Privilege	Maybe

Patches

2 patches

Article	Type	Restart
`4011026`	Security Update	Maybe
`4022183`	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

Ashar Javed

References

MSRC Advisory MITRE NVD