CVE-2018-0950 — Microsoft Office Information Disclosure Vulnerability

Executive Summary

An information disclosure vulnerability exists when Office renders Rich Text Format (RTF) email messages containing OLE objects when a message is opened or previewed. This vulnerability could potentially result in the disclosure of sensitive information to a malicious site. To exploit the vulnerability, an attacker would have to send an RTF-formatted email to a user and convince the user to open or preview the email. A connection to a remote SMB server could then be automatically initiated, enabling the attacker to brute-force attack the corresponding NTLM challenge and response in order to disclose the corresponding hash password. The security update addresses the vulnerability by correcting how Office processes OLE objects.

Overview

Important

MS Severity

Not Exploited

MS Exploit Status

More Likely

MS Exploit Likelihood

Category Information Disclosure

Released Apr 10 2018

Last Updated Apr 10 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

13 affected products

Product	KB Article	Severity	Impact	Restart Required
Microsoft Office 2010 Service Pack 2 (32-bit editions)	`4018357 (Security Update)`	Important	Information Disclosure	Maybe
Microsoft Office 2010 Service Pack 2 (64-bit editions)	`4018357 (Security Update)`	Important	Information Disclosure	Maybe
Microsoft Office 2016 Click-to-Run (C2R) for 32-bit editions	`Click to Run (Security Update)`	Important	Information Disclosure	Maybe
Microsoft Office 2016 Click-to-Run (C2R) for 64-bit editions	`Click to Run (Security Update)`	Important	Information Disclosure	Maybe
Microsoft Office Compatibility Pack Service Pack 3	`4018354 (Security Update)`	Important	Information Disclosure	Maybe
Microsoft Word 2007 Service Pack 3	`4018355 (Security Update)`	Important	Information Disclosure	Maybe
Microsoft Word 2010 Service Pack 2 (32-bit editions)	`4018359 (Security Update)`	Important	Information Disclosure	Maybe
Microsoft Word 2010 Service Pack 2 (64-bit editions)	`4018359 (Security Update)`	Important	Information Disclosure	Maybe
Microsoft Word 2013 RT Service Pack 1	`4018347 (Security Update)`	Important	Information Disclosure	Maybe
Microsoft Word 2013 Service Pack 1 (32-bit editions)	`4018347 (Security Update)`	Important	Information Disclosure	Maybe
Microsoft Word 2013 Service Pack 1 (64-bit editions)	`4018347 (Security Update)`	Important	Information Disclosure	Maybe
Microsoft Word 2016 (32-bit edition)	`4018339 (Security Update)`	Important	Information Disclosure	Maybe
Microsoft Word 2016 (64-bit edition)	`4018339 (Security Update)`	Important	Information Disclosure	Maybe

Patches

7 patches

Article	Type	Restart
`4018357`	Security Update	Maybe
`Click to Run`	Security Update	Maybe
`4018354`	Security Update	Maybe
`4018355`	Security Update	Maybe
`4018359`	Security Update	Maybe
`4018347`	Security Update	Maybe
`4018339`	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

Will Dormann CERT/CC

References

MSRC Advisory MITRE NVD