Critical Patches Issued for Microsoft Products

Critical Patches Issued for Microsoft Products

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OVERVIEW
Multiple vulnerabilities have been discovered in Microsoft products, the most severe of which could allow for remote code execution in the context of the logged-on user. Depending on the privileges associated with the user, 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 those who operate with administrative user rights.

THREAT INTELLIGENCE
There are currently no reports of these vulnerabilities being exploited in the wild.

SYSTEMS AFFECTED
.NET and Visual Studio
.NET Core
.NET Framework
ASP .NET
Azure DevOps
Microsoft Dynamics
Microsoft Edge (Chromium-based)
Microsoft Exchange Server
Microsoft Office
Microsoft Office Excel
Microsoft Office OneNote
Microsoft Office Outlook
Microsoft Office SharePoint
Microsoft Power Apps
Microsoft Printer Drivers
Microsoft WDAC OLE DB provider for SQL
Microsoft Windows Codecs Library
NuGet Client
Remote Desktop Client
Role: DNS Server
SysInternals
Visual Studio
Visual Studio Code
Windows Authentication Methods
Windows Bus Filter Driver
Windows Cloud Files Mini Filter Driver
Windows Collaborative Translation Framework
Windows Container Manager Service
Windows CryptoAPI
Windows DHCP Server
Windows Filtering
Windows GDI
Windows Geolocation Service
Windows Group Policy
Windows Hello
Windows Hyper-V
Windows Installer
Windows iSCSI
Windows Kernel
Windows NTFS
Windows ODBC Driver
Windows OLE
Windows PGM
Windows Remote Procedure Call Runtime
Windows Resilient File System (ReFS)
Windows Server Service
Windows SMB
Windows TPM Device Driver
Windows Win32K

RISK
Government:
• Large and medium government entities: High
• Small government entities: Medium

Businesses:
• Large and medium business entities: High
• Small business entities: Medium

Home Use: Low Risk

TECHNICAL SUMMARY
Multiple vulnerabilities have been discovered in Microsoft products, the most severe of which could allow for remote code execution.

A full list of all vulnerabilities can be found at the link below:
https://learn.cisecurity.org/e/799323/update-guide/4szkqn/984153334?h=G0SCv2rVq7TbOX-iBlEVhbuv8iVjtIORYEz63tLpEu0

Successful exploitation of the most severe of these vulnerabilities could result in an attacker gaining the same privileges as the logged-on user. Depending on the privileges associated with the user, 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 those who operate with administrative user rights.

RECOMMENDATIONS
We recommend the following actions be taken:

Apply appropriate patches or appropriate mitigations provided by Microsoft to vulnerable systems immediately after appropriate testing. (M1051: Update Software)

o Safeguard 7.1: Establish and Maintain a Vulnerability Management Process: Establish and maintain a documented vulnerability management process for enterprise assets. Review and update documentation annually, or when significant enterprise changes occur that could impact this Safeguard.

o Safeguard 7.4: Perform Automated Application Patch Management: Perform application updates on enterprise assets through automated patch management on a monthly, or more frequent, basis.
Apply the Principle of Least Privilege to all systems and services, and run all software as a non-privileged user (one without administrative rights) to diminish the effects of a successful attack. (M1026: Privileged Account Management)

o Safeguard 4.7: Manage Default Accounts on Enterprise Assets and Software: Manage default accounts on enterprise assets and software, such as root, administrator, and other pre-configured vendor accounts. Example implementations can include: disabling default accounts or making them unusable.

o Safeguard 5.4: Restrict Administrator Privileges to Dedicated Administrator Accounts: Restrict administrator privileges to dedicated administrator accounts on enterprise assets. Conduct general computing activities, such as internet browsing, email, and productivity suite use, from the user’s primary, non-privileged account.
Remind all users not to visit untrusted websites or follow links/open files provided by unknown or untrusted sources. (M1017: User Training)

o Safeguard 14.1: Establish and Maintain a Security Awareness Program: Establish and maintain a security awareness program. The purpose of a security awareness program is to educate the enterprise’s workforce on how to interact with enterprise assets and data in a secure manner. Conduct training at hire and, at a minimum, annually. Review and update content annually, or when significant enterprise changes occur that could impact this Safeguard.

o Safeguard 14.2: Train Workforce Members to Recognize Social Engineering Attacks: Train workforce members to recognize social engineering attacks, such as phishing, pre-texting, and tailgating.
Use capabilities to prevent suspicious behavior patterns from occurring on endpoint systems. This could include suspicious process, file, API call, etc. behavior. (M1040 : Behavior Prevention on Endpoint)

o Safeguard 13.2 : Deploy a Host-Based Intrusion Detection Solution: Deploy a host-based intrusion detection solution on enterprise assets, where appropriate and/or supported.

o Safeguard 13.7 : Deploy a Host-Based Intrusion Prevention Solution: Deploy a host-based intrusion prevention solution on enterprise assets, where appropriate and/or supported. Example implementations include use of an Endpoint Detection and Response (EDR) client or host-based IPS agent.

 

REFERENCES
Microsoft: https://msrc.microsoft.com/update-guide/
https://msrc.microsoft.com/update-guide/releaseNote/2023-Jun

BleepingComputer: https://www.bleepingcomputer.com/news/microsoft/microsoft-june-2023-patch-tuesday-fixes-78-flaws-38-rce-bugs/

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