Описание
Microsoft Office Memory Corruption Vulnerability
A remote code execution vulnerability exists in Microsoft Office software when the Office software fails to properly handle objects in memory. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the current user. If the current user is logged on with administrative user rights, an attacker could take control of the affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.
Exploitation of the vulnerability requires that a user open a specially crafted file with an affected version of Microsoft Office software. In an email attack scenario, an attacker could exploit the vulnerability by sending the specially crafted file to the user and convincing the user to open the file. In a web-based attack scenario, an attacker could host a website (or leverage a compromised website that accepts or hosts user-provided content) that contains a specially crafted file designed to exploit the vulnerability. An attacker would have no way to force users to visit the website. Instead, an attacker would have to convince users to click a link, typically by way of an enticement in an email or instant message, and then convince them to open the specially crafted file.
Note that where severity is indicated as Critical in the Affected Products table, the Preview Pane is an attack vector.
The security update addresses the vulnerability by correcting how Office handles objects in memory.
Обходное решение
Use Microsoft Office File Block policy to prevent Office from opening RTF documents from unknown or untrusted sources Warning If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.
For Office 2016
- Run regedit.exe as Administrator and navigate to the following subkey:
[HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Word\Security\FileBlock]
- Set the RtfFiles DWORD value to 2.
- Set the OpenInProtectedView DWORD value to 0.
Impact of Workaround. Users who have configured the File Block policy and have not configured a special “exempt directory” as discussed in Microsoft Knowledge Base Article 922849 will be unable to open documents saved in the RTF format.
How to undo the workaround. For Office 2016
- Run regedit.exe as Administrator and navigate to the following subkey:
[HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Word\Security\FileBlock]
- Set the RtfFiles DWORD value to 0.
- Set the OpenInProtectedView DWORD value to 0.
Обновления
| Продукт | Статья | Обновление |
|---|---|---|
| Microsoft Word 2016 (32-bit edition) | ||
| Microsoft Word 2016 (64-bit edition) |
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Возможность эксплуатации
Publicly Disclosed
Exploited
Latest Software Release
Older Software Release
DOS
EPSS
Связанные уязвимости
Microsoft Word 2016 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted document, aka "Microsoft Office Memory Corruption Vulnerability." This vulnerability is different from those described in CVE-2017-0006, CVE-2017-0020, CVE-2017-0030, CVE-2017-0031, CVE-2017-0052, and CVE-2017-0053.
Microsoft Word 2016 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted document, aka "Microsoft Office Memory Corruption Vulnerability." This vulnerability is different from those described in CVE-2017-0006, CVE-2017-0020, CVE-2017-0030, CVE-2017-0031, CVE-2017-0052, and CVE-2017-0053.
Уязвимость текстового редактора Microsoft Word, позволяющая нарушителю вызвать отказ в обслуживании или выполнить произвольный код
EPSS