KLA11069 Multiple vulnerabilities in Microsoft Office

Multiple serious vulnerabilities have been found in Microsoft Office. Malicious users can exploit these vulnerabilities to execute arbitrary code, gain privileges and spoof user interface.

Below is a complete list of vulnerabilities:

1. Multiple vulnerabilities related to improper handling of objects in memory in Microsoft Office can be exploited via a specially designed file to execute arbitrary code;
2. Multiple vulnerabilities related to incorrect handling of web requests in Microsoft Exchange Outlook Web Access can be exploited by sending a specially designed email message containing a malicious link to a user to execute arbitrary code;
3. An improper sanitization of web requests in Microsoft SharePoint Server can be exploited via a specially designed web request to gain privileges;
4. An open redirect vulnerability in Microsoft Exchange can be exploited by sending a link that has a specially designed URL and convincing a user to open it to spoof user interface.

Original advisories

CVE-2017-0243

CVE-2017-8501

CVE-2017-8502

CVE-2017-8569

CVE-2017-8570

CVE-2017-0243

CVE-2017-8501

CVE-2017-8502

CVE-2017-8570

Exploitation

This vulnerability can be exploited by the following malware:

https://threats.kaspersky.com/en/threat/Exploit.MSOffice.CVE-2017-8570/

Public exploits exist for this vulnerability.

Related products

Microsoft-Office

Microsoft-Excel

Microsoft-Sharepoint-Server

Microsoft-Exchange-Server

CVE list

CVE-2017-0243 critical

CVE-2017-8501 critical

CVE-2017-8502 critical

CVE-2017-8570 critical

CVE-2017-8569 critical

KB list

3213537

2880514

3191833

3191894

3191897

3191902

3191907

3203459

3203468

3203469

3203477

3212224

3213544

3213545

3213555

3213559

3213624

3213640

3213657

Solution

Install necessary updates from the KB section, that are listed in your Windows Update (Windows Update usually can be accessed from the Control Panel)

Impacts

• ACE

Arbitrary code execution. Exploitation of vulnerabilities with this impact can lead to executing by abuser any code or commands at vulnerable machine or process.

• SB

Security bypass. Exploitation of vulnerabilities with this impact can lead to performing actions restricted by current security settings.

• PE

Privilege escalation. Exploitation of vulnerabilities with this impact can lead to performing by abuser actions, which are normally disallowed for current role.

• SUI

Spoof user interface. Exploitation of vulnerabilities with this impact can lead to changes in user interface to beguile user into inaccurate behavior.

Affected Products

• Microsoft Exchange Server 2016 Cumulative Update 5Microsoft Business Productivity Servers 2010 Service Pack 2Microsoft Office 2007 Service Pack 3Microsoft Office 2010 Service Pack 2Microsoft Office 2013 RT Service Pack 1Microsoft Office 2013 Service Pack 1Microsoft Office 2016Microsoft Office Web Apps 2010 Service Pack 2Microsoft Office 2016 for MacMicrosoft Office Compatibility Pack Service Pack 3Microsoft Office for Mac 2011Microsoft Office Online Server 2016Microsoft Excel 2007 Service Pack 3Microsoft Excel 2010 Service Pack 2Microsoft Excel 2013 Service Pack 1Microsoft Excel 2013 RT Service Pack 1Microsoft Excel 2016Microsoft Excel Viewer 2007 Service Pack 3Microsoft SharePoint Enterprise Server 2013Microsoft SharePoint Enterprise Server 2016Microsoft Exchange Server 2010 Service Pack 3Microsoft Exchange Server 2013 Cumulative Update 16Microsoft Exchange Server 2013 Service Pack 1