KLA11139 Multiple vulnerabilities in Microsoft Office

Multiple serious vulnerabilities have been found in Microsoft Office. Malicious users can exploit these vulnerabilities to execute arbitrary code, bypass security restrictions and privilege escalations.

Below is a complete list of vulnerabilities:

1. Multiple vulnerabilities related to an incorrect handing of objects in memory in Microsoft Office can be exploited remotely via sending a specially designed document to affected system to execute arbitrary code;
2. An improper user sessions management in Microsoft Project Server can be exploited remotely via a specially designed website to gain privileges;
3. An incorrect process of processing macros settings in Excel document can be exploited remotely to bypass security restrictions;

Technical details

Vulnerability (1) requires that a user open a file with an affected version of Microsoft Office.

Original advisories

ADV170020

CVE-2017-11854

CVE-2017-11876

CVE-2017-11877

CVE-2017-11878

CVE-2017-11882

CVE-2017-11884

Exploitation

This vulnerability can be exploited by the following malware:

https://threats.kaspersky.com/en/threat/Exploit.MSOffice.CVE-2017-11882/

https://threats.kaspersky.com/en/threat/Exploit.Win32.CVE-2017-11882/

https://threats.kaspersky.com/en/threat/Trojan.Win32.FormBook/

https://threats.kaspersky.com/en/threat/Trojan-PSW.Win32.Azorult/

Public exploits exist for this vulnerability.

Related products

Microsoft-Office-Professional-Plus-2010

Microsoft-Office

Microsoft-Excel

Microsoft-Word

CVE list

CVE-2017-11854 critical

CVE-2017-11876 critical

CVE-2017-11877 high

CVE-2017-11878 critical

CVE-2017-11882 critical

CVE-2017-11884 critical

KB list

4011242

4011247

4011268

4011245

4011244

4011265

4011264

4011267

4011266

4011262

4011206

4011205

4011220

3162047

4011233

4011250

4011199

4011257

4011270

4011271

4011197

4011618

4011020

4011604

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 Word 2016 for MacMicrosoft Excel 2016 Click-to-Run (C2R) for 32-bit editionsMicrosoft Excel 2016 Click-to-Run (C2R) for 64-bit editionsMicrosoft Excel 2007 Service Pack 3Microsoft Excel 2010 Service Pack 2 (32-bit editions)Microsoft Excel 2010 Service Pack 2 (64-bit editions)Microsoft Excel 2013 RT Service Pack 1Microsoft Excel 2013 Service Pack 1 (32-bit editions)Microsoft Excel 2013 Service Pack 1 (64-bit editions)Microsoft Excel 2016 (32-bit edition)Microsoft Excel 2016 (64-bit edition)Microsoft Excel 2016 for MacMicrosoft Excel Viewer 2007 Service Pack 3Microsoft Office 2007 Service Pack 3Microsoft Office 2010 Service Pack 2 (32-bit editions)Microsoft Office 2010 Service Pack 2 (64-bit editions)Microsoft Office 2013 Service Pack 1 (32-bit editions)Microsoft Office 2013 Service Pack 1 (64-bit editions)Microsoft Office 2016 (32-bit edition)Microsoft Office 2016 (64-bit edition)Microsoft Office Compatibility Pack Service Pack 3Microsoft Office Web Apps 2010 Service Pack 2Microsoft Office Web Apps Server 2013 Service Pack 1Microsoft Office Word ViewerMicrosoft Project Server 2013 Service Pack 1Microsoft SharePoint Enterprise Server 2016Microsoft Word 2007 Service Pack 3Microsoft Word 2010 Service Pack 2 (32-bit editions)Microsoft Word 2010 Service Pack 2 (64-bit editions)Microsoft Word 2013 RT Service Pack 1Microsoft Word 2013 Service Pack 1 (32-bit editions)Microsoft Word 2013 Service Pack 1 (64-bit editions)Microsoft Word 2016 (32-bit edition)Microsoft Word 2016 (64-bit edition)