Zscaler protects against 11 new vulnerabilities for Internet Explorer, Microsoft Edge, Microsoft Windows, ChakraCore and Microsoft Word.

Zscaler, working with Microsoft through their MAPP program, has proactively deployed protection for the following 11 vulnerabilities included in the February 2018 Microsoft security bulletins. Zscaler will continue to monitor exploits associated with all vulnerabilities in the February release and deploy additional protections as necessary. 

CVE-2018-0742 – Windows Kernel Elevation of Privilege Vulnerability

Severity: Important
Affected Software

• Windows 7 for 32-bit Systems Service Pack 1
• Windows 7 for x64-based Systems Service Pack 1
• Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
• Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1
• Windows Server 2008 R2 for x64-based Systems Service Pack 1
• Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)
• Windows Server 2012
• Windows Server 2012 (Server Core installation)
• Windows 8.1 for 32-bit systems
• Windows 8.1 for x64-based systems
• Windows Server 2012 R2
• Windows RT 8.1
• Windows Server 2012 R2 (Server Core installation)
• Windows 10 for 32-bit Systems
• Windows 10 for x64-based Systems
• Windows 10 Version 1511 for x64-based Systems
• Windows 10 Version 1511 for 32-bit Systems
• Windows Server 2016
• Windows 10 Version 1607 for 32-bit Systems
• Windows 10 Version 1607 for x64-based Systems
• Windows Server 2016  (Server Core installation)
• Windows 10 Version 1703 for 32-bit Systems
• Windows 10 Version 1703 for x64-based Systems
• Windows 10 Version 1709 for 32-bit Systems
• Windows 10 Version 1709 for x64-based Systems
• Windows Server, version 1709  (Server Core Installation)
• Windows Server 2008 for Itanium-Based Systems Service Pack 2
• Windows Server 2008 for 32-bit Systems Service Pack 2
• Windows Server 2008 for x64-based Systems Service Pack 2
• Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)

An elevation of privilege vulnerability exists in the way that the Windows Kernel handles objects in memory. An attacker who successfully exploited the vulnerability could execute code with elevated permissions. To exploit the vulnerability, a locally authenticated attacker could run a specially crafted application. The security update addresses the vulnerability by ensuring the Windows Kernel properly handles objects in memory.

CVE-2018-0825 – StructuredQuery Remote Code Execution Vulnerability

Severity: Critical
Affected Software

• Windows 7 for 32-bit Systems Service Pack 1
• Windows 7 for x64-based Systems Service Pack 1
• Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
• Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1
• Windows Server 2008 R2 for x64-based Systems Service Pack 1
• Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)
• Windows Server 2012
• Windows Server 2012 (Server Core installation)
• Windows 8.1 for 32-bit systems
• Windows 8.1 for x64-based systems
• Windows Server 2012 R2
• Windows RT 8.1
• Windows Server 2012 R2 (Server Core installation)
• Windows 10 for 32-bit Systems
• Windows 10 for x64-based Systems
• Windows 10 Version 1511 for x64-based Systems
• Windows 10 Version 1511 for 32-bit Systems
• Windows Server 2016
• Windows 10 Version 1607 for 32-bit Systems
• Windows 10 Version 1607 for x64-based Systems
• Windows Server 2016  (Server Core installation)
• Windows 10 Version 1703 for 32-bit Systems
• Windows 10 Version 1703 for x64-based Systems
• Windows 10 Version 1709 for 32-bit Systems
• Windows 10 Version 1709 for x64-based Systems
• Windows Server, version 1709  (Server Core Installation)
• Windows Server 2008 for Itanium-Based Systems Service Pack 2
• Windows Server 2008 for 32-bit Systems Service Pack 2
• Windows Server 2008 for x64-based Systems Service Pack 2
• Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)

A remote code execution vulnerability exists in StructuredQuery when the 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 typically requires that a user open a specially crafted file. 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) containing 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 StructuredQuery handles objects in memory.

CVE-2018-0834 – Scripting Engine Memory Corruption Vulnerability

Severity: Critical
Affected Software

• Microsoft Edge on Windows 10 for 32-bit Systems
• Microsoft Edge on Windows 10 for x64-based Systems
• Microsoft Edge on Windows 10 Version 1511 for x64-based Systems
• Microsoft Edge on Windows 10 Version 1511 for 32-bit Systems
• Microsoft Edge on Windows Server 2016
• Microsoft Edge on Windows 10 Version 1607 for 32-bit Systems
• Microsoft Edge on Windows 10 Version 1607 for x64-based Systems
• Microsoft Edge on Windows 10 Version 1703 for 32-bit Systems
• Microsoft Edge on Windows 10 Version 1703 for x64-based Systems
• Microsoft Edge on Windows 10 Version 1709 for 32-bit Systems
• Microsoft Edge on Windows 10 Version 1709 for x64-based Systems
• ChakraCore

A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Microsoft Edge. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. If the current user is logged on with administrative user rights, 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. In a web-based attack scenario, an attacker could host a specially crafted website that is designed to exploit the vulnerability through Microsoft Edge and then convince a user to view the website. The attacker could also take advantage of compromised websites and websites that accept or host user-provided content or advertisements. These websites could contain specially crafted content that could exploit the vulnerability. The security update addresses the vulnerability by modifying how the scripting engine handles objects in memory.

CVE-2018-0835 – Scripting Engine Memory Corruption Vulnerability

Severity: Critical
Affected Software

• Microsoft Edge on Windows 10 for 32-bit Systems
• Microsoft Edge on Windows 10 for x64-based Systems
• Microsoft Edge on Windows 10 Version 1511 for x64-based Systems
• Microsoft Edge on Windows 10 Version 1511 for 32-bit Systems
• Microsoft Edge on Windows Server 2016
• Microsoft Edge on Windows 10 Version 1607 for 32-bit Systems
• Microsoft Edge on Windows 10 Version 1607 for x64-based Systems
• Microsoft Edge on Windows 10 Version 1703 for 32-bit Systems
• Microsoft Edge on Windows 10 Version 1703 for x64-based Systems
• Microsoft Edge on Windows 10 Version 1709 for 32-bit Systems
• Microsoft Edge on Windows 10 Version 1709 for x64-based Systems
• ChakraCore

A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Microsoft Edge. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. If the current user is logged on with administrative user rights, 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. In a web-based attack scenario, an attacker could host a specially crafted website that is designed to exploit the vulnerability through Microsoft Edge and then convince a user to view the website. The attacker could also take advantage of compromised websites and websites that accept or host user-provided content or advertisements. These websites could contain specially crafted content that could exploit the vulnerability. The security update addresses the vulnerability by modifying how the scripting engine handles objects in memory.

CVE-2018-0837 – Scripting Engine Memory Corruption Vulnerability

Severity: Critical
Affected Software

• Microsoft Edge on Windows 10 for 32-bit Systems
• Microsoft Edge on Windows 10 for x64-based Systems
• Microsoft Edge on Windows 10 Version 1511 for x64-based Systems
• Microsoft Edge on Windows 10 Version 1511 for 32-bit Systems
• Microsoft Edge on Windows Server 2016
• Microsoft Edge on Windows 10 Version 1607 for 32-bit Systems
• Microsoft Edge on Windows 10 Version 1607 for x64-based Systems
• Microsoft Edge on Windows 10 Version 1703 for 32-bit Systems
• Microsoft Edge on Windows 10 Version 1703 for x64-based Systems
• Microsoft Edge on Windows 10 Version 1709 for 32-bit Systems
• Microsoft Edge on Windows 10 Version 1709 for x64-based Systems
• ChakraCore

A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Microsoft Edge. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. If the current user is logged on with administrative user rights, 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. In a web-based attack scenario, an attacker could host a specially crafted website that is designed to exploit the vulnerability through Microsoft Edge and then convince a user to view the website. The attacker could also take advantage of compromised websites and websites that accept or host user-provided content or advertisements. These websites could contain specially crafted content that could exploit the vulnerability. The security update addresses the vulnerability by modifying how the scripting engine handles objects in memory.

CVE-2018-0838 – Scripting Engine Memory Corruption Vulnerability

Severity: Critical
Affected Software

• Microsoft Edge on Windows 10 for 32-bit Systems
• Microsoft Edge on Windows 10 for x64-based Systems
• Microsoft Edge on Windows 10 Version 1511 for x64-based Systems
• Microsoft Edge on Windows 10 Version 1511 for 32-bit Systems
• Microsoft Edge on Windows Server 2016
• Microsoft Edge on Windows 10 Version 1607 for 32-bit Systems
• Microsoft Edge on Windows 10 Version 1607 for x64-based Systems
• Microsoft Edge on Windows 10 Version 1703 for 32-bit Systems
• Microsoft Edge on Windows 10 Version 1703 for x64-based Systems
• Microsoft Edge on Windows 10 Version 1709 for 32-bit Systems
• Microsoft Edge on Windows 10 Version 1709 for x64-based Systems
• ChakraCore

A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Microsoft Edge. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. If the current user is logged on with administrative user rights, 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. In a web-based attack scenario, an attacker could host a specially crafted website that is designed to exploit the vulnerability through Microsoft Edge and then convince a user to view the website. The attacker could also take advantage of compromised websites and websites that accept or host user-provided content or advertisements. These websites could contain specially crafted content that could exploit the vulnerability. The security update addresses the vulnerability by modifying how the scripting engine handles objects in memory.

CVE-2018-0840 – Scripting Engine Memory Corruption Vulnerability

Severity: Critical
Affected Software

• Internet Explorer 11 on Windows 7 for 32-bit Systems Service Pack 1
• Internet Explorer 11 on Windows 7 for x64-based Systems Service Pack 1
• Internet Explorer 11 on Windows Server 2008 R2 for x64-based Systems Service Pack 1
• Internet Explorer 11 on Windows 8.1 for 32-bit systems
• Internet Explorer 11 on Windows 8.1 for x64-based systems
• Internet Explorer 11 on Windows Server 2012 R2
• Internet Explorer 11 on Windows RT 8.1
• Internet Explorer 11 on Windows 10 for 32-bit Systems
• Internet Explorer 11 on Windows 10 for x64-based Systems
• Internet Explorer 11 on Windows 10 Version 1511 for x64-based Systems
• Internet Explorer 11 on Windows 10 Version 1511 for 32-bit Systems
• Internet Explorer 11 on Windows Server 2016
• Internet Explorer 11 on Windows 10 Version 1607 for 32-bit Systems
• Internet Explorer 11 on Windows 10 Version 1607 for x64-based Systems
• Internet Explorer 11 on Windows 10 Version 1703 for 32-bit Systems
• Internet Explorer 11 on Windows 10 Version 1703 for x64-based Systems
• Internet Explorer 11 on Windows 10 Version 1709 for 32-bit Systems
• Internet Explorer 11 on Windows 10 Version 1709 for x64-based Systems
• Internet Explorer 10 on Windows Server 2012
• Microsoft Edge on Windows 10 for 32-bit Systems
• Microsoft Edge on Windows 10 for x64-based Systems
• Microsoft Edge on Windows 10 Version 1511 for x64-based Systems
• Microsoft Edge on Windows 10 Version 1511 for 32-bit Systems
• Microsoft Edge on Windows Server 2016
• Microsoft Edge on Windows 10 Version 1607 for 32-bit Systems
• Microsoft Edge on Windows 10 Version 1607 for x64-based Systems
• Microsoft Edge on Windows 10 Version 1703 for 32-bit Systems
• Microsoft Edge on Windows 10 Version 1703 for x64-based Systems
• Microsoft Edge on Windows 10 Version 1709 for 32-bit Systems
• Microsoft Edge on Windows 10 Version 1709 for x64-based Systems
• ChakraCore

A remote code execution vulnerability exists in the way the scripting engine handles objects in memory in Microsoft browsers. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. If the current user is logged on with administrative user rights, 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. In a web-based attack scenario, an attacker could host a specially crafted website designed to exploit the vulnerability through a Microsoft browser and then convince a user to view the website. An attacker could also embed an ActiveX control marked "safe for initialization; in an application or Microsoft Office document that hosts the browser rendering engine. The attacker could also take advantage of compromised websites and websites that accept or host user-provided content or advertisements. These websites could contain specially crafted content that could exploit the vulnerability. The security update addresses the vulnerability by modifying how the scripting engine handles objects in memory.

CVE-2018-0842 – Windows Remote Code Execution Vulnerability

Severity: Important
Affected Software

• Windows 7 for 32-bit Systems Service Pack 1
• Windows 7 for x64-based Systems Service Pack 1
• Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
• Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1
• Windows Server 2008 R2 for x64-based Systems Service Pack 1
• Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)
• Windows Server 2012
• Windows Server 2012 (Server Core installation)
• Windows 8.1 for 32-bit systems
• Windows 8.1 for x64-based systems
• Windows Server 2012 R2
• Windows RT 8.1
• Windows Server 2012 R2 (Server Core installation)
• Windows 10 for 32-bit Systems
• Windows 10 for x64-based Systems
• Windows 10 Version 1511 for x64-based Systems
• Windows 10 Version 1511 for 32-bit Systems
• Windows Server 2016
• Windows 10 Version 1607 for 32-bit Systems
• Windows 10 Version 1607 for x64-based Systems
• Windows Server 2016  (Server Core installation)
• Windows 10 Version 1703 for 32-bit Systems
• Windows 10 Version 1703 for x64-based Systems
• Windows 10 Version 1709 for 32-bit Systems
• Windows 10 Version 1709 for x64-based Systems
• Windows Server, version 1709  (Server Core Installation)
• Windows Server 2008 for Itanium-Based Systems Service Pack 2
• Windows Server 2008 for 32-bit Systems Service Pack 2
• Windows Server 2008 for x64-based Systems Service Pack 2
• Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)

A remote code execution vulnerability exists when Windows improperly handles objects in memory. An attacker who successfully exploited these vulnerabilities could take control of an affected system. To exploit the vulnerabilities, an attacker would first have to log on to the target system and then run a specially crafted application. The updates address the vulnerabilities by correcting how Windows handles objects in memory.

CVE-2018-0858 – Scripting Engine Memory Corruption Vulnerability

Severity: Critical
Affected Software

• ChakraCore

A remote code execution vulnerability exists in the way that the ChakraCore scripting engine handles objects in memory. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. If the current user is logged on with administrative user rights, 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. The security update addresses the vulnerability by modifying how the ChakraCore scripting engine handles objects in memory.

CVE-2018-0860 – Scripting Engine Memory Corruption Vulnerability

Severity: Critical
Affected Software

• Microsoft Edge on Windows 10 for 32-bit Systems
• Microsoft Edge on Windows 10 for x64-based Systems
• Microsoft Edge on Windows 10 Version 1511 for x64-based Systems
• Microsoft Edge on Windows 10 Version 1511 for 32-bit Systems
• Microsoft Edge on Windows Server 2016
• Microsoft Edge on Windows 10 Version 1607 for 32-bit Systems
• Microsoft Edge on Windows 10 Version 1607 for x64-based Systems
• Microsoft Edge on Windows 10 Version 1703 for 32-bit Systems
• Microsoft Edge on Windows 10 Version 1703 for x64-based Systems
• Microsoft Edge on Windows 10 Version 1709 for 32-bit Systems
• Microsoft Edge on Windows 10 Version 1709 for x64-based Systems
• ChakraCore

A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Microsoft Edge. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. If the current user is logged on with administrative user rights, 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. In a web-based attack scenario, an attacker could host a specially crafted website that is designed to exploit the vulnerability through Microsoft Edge and then convince a user to view the website. The attacker could also take advantage of compromised websites and websites that accept or host user-provided content or advertisements. These websites could contain specially crafted content that could exploit the vulnerability. The security update addresses the vulnerability by modifying how the scripting engine handles objects in memory.

CVE-2018-0866 – Scripting Engine Memory Corruption Vulnerability

Severity: Important
Affected Software

• Microsoft Edge on Windows 10 for 32-bit Systems
• Microsoft Edge on Windows 10 for x64-based Systems
• Microsoft Edge on Windows 10 Version 1511 for x64-based Systems
• Microsoft Edge on Windows 10 Version 1511 for 32-bit Systems
• Microsoft Edge on Windows Server 2016
• Microsoft Edge on Windows 10 Version 1607 for 32-bit Systems
• Microsoft Edge on Windows 10 Version 1607 for x64-based Systems
• Microsoft Edge on Windows 10 Version 1703 for 32-bit Systems
• Microsoft Edge on Windows 10 Version 1703 for x64-based Systems
• Microsoft Edge on Windows 10 Version 1709 for 32-bit Systems
• Microsoft Edge on Windows 10 Version 1709 for x64-based Systems
• ChakraCore

A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Microsoft Edge. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. If the current user is logged on with administrative user rights, 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. In a web-based attack scenario, an attacker could host a specially crafted website that is designed to exploit the vulnerability through Microsoft Edge and then convince a user to view the website. The attacker could also take advantage of compromised websites and websites that accept or host user-provided content or advertisements. These websites could contain specially crafted content that could exploit the vulnerability. The security update addresses the vulnerability by modifying how the scripting engine handles objects in memory.