CVE-2018-0791 — Microsoft Office Remote Code Execution Vulnerability

Executive Summary

A remote code execution vulnerability exists in the way that Microsoft Offiice parses specially crafted email messages. An attacker who successfully exploited the vulnerability could take control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Exploitation of this vulnerability requires that a user open a specially crafted file with an affected version of Microsoft Offiice. In an email attack scenario, an attacker could exploit the vulnerability by sending a specially crafted file to the user and then convincing the user to open the file. The security update addresses the vulnerability by correcting the way that Microsoft Offiice parses specially crafted email messages.

Overview

Important

MS Severity

Not Exploited

MS Exploit Status

Less Likely

MS Exploit Likelihood

Category Remote Code Execution

Released Jan 9 2018

Last Updated Jan 9 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

10 affected products

Product	KB Article	Severity	Impact	Restart Required
Microsoft Office 2016 Click-to-Run (C2R) for 32-bit editions	`Click to Run (Security Update)`	Important	Remote Code Execution	Maybe
Microsoft Office 2016 Click-to-Run (C2R) for 64-bit editions	`Click to Run (Security Update)`	Important	Remote Code Execution	No
Microsoft Outlook 2007 Service Pack 3	`4011213 (Security Update)`	Important	Remote Code Execution	Maybe
Microsoft Outlook 2010 Service Pack 2 (32-bit editions)	`4011273 (Security Update)`	Important	Remote Code Execution	Maybe
Microsoft Outlook 2010 Service Pack 2 (64-bit editions)	`4011273 (Security Update)`	Important	Remote Code Execution	Maybe
Microsoft Outlook 2013 RT Service Pack 1	`4011637 (Security Update)`	Important	Remote Code Execution	Maybe
Microsoft Outlook 2013 Service Pack 1 (32-bit editions)	`4011637 (Security Update)`	Important	Remote Code Execution	Maybe
Microsoft Outlook 2013 Service Pack 1 (64-bit editions)	`4011637 (Security Update)`	Important	Remote Code Execution	Maybe
Microsoft Outlook 2016 (32-bit edition)	`4011626 (Security Update)`	Important	Remote Code Execution	Maybe
Microsoft Outlook 2016 (64-bit edition)	`4011626 (Security Update)`	Important	Remote Code Execution	Maybe

Patches

5 patches

Article	Type	Restart
`Click to Run`	Security Update	Maybe
`4011213`	Security Update	Maybe
`4011273`	Security Update	Maybe
`4011637`	Security Update	Maybe
`4011626`	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

Nicolas Joly of Microsoft Corporation

References

MSRC Advisory MITRE NVD