Critical Patches Issued for Microsoft Products, July 11, 2023
MS-ISAC ADVISORY NUMBER:2023-075
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.
There are currently no reports of these vulnerabilities being exploited in the wild.
July 12 - UPDATED THREAT INTELLIGENCE:
There have been five vulnerabilities within Microsoft's critical patches that have been exploited in the wild. The CVEs are CVE-2023-32046, CVE-2023-32049, CVE-2023-35311, CVE-2023-36874, and CVE-2023-36884.
- .NET and Visual Studio
- ASP.NET and .NET
- Azure Active Directory
- Microsoft Dynamics
- Microsoft Graphics Component
- Microsoft Media-Wiki Extensions
- Microsoft Office
- Microsoft Office Access
- Microsoft Office Excel
- Microsoft Office Outlook
- Microsoft Office Share-Point
- Microsoft Power Apps
- Microsoft Printer Drivers
- Microsoft Windows Codecs Library
- Mono Authenticode
- Paint 3D
- Role: DNS Server
- Service Fabric
- Visual Studio Code
- Windows Active Directory Certificate Services
- Windows Active Template Library
- Windows Admin Center
- Windows App Store
- Windows Authentication Methods
- Windows CDP User Components
- Windows CNG Key Isolation Service
- Windows Certificates
- Windows Clip Service
- Windows Cloud Files Mini Filter Driver
- Windows Cluster Server
- Windows Common Log File System Driver
- Windows Connected User Experiences and Telemetry
- Windows Crypto-API
- Windows Cryptographic Services
- Windows Defender
- Windows Deployment Services
- Windows EFI Partition
- Windows Error Reporting
- Windows Failover Cluster
- Windows Geolocation Service
- Windows HTTP.sys
- Windows Image Acquisition
- Windows Installer
- Windows Kernel
- Windows Layer 2 Tunneling Protocol
- Windows Layer2 Bridge Network Driver
- Windows Local Security Authority (LSA)
- Windows MSHTML Platform
- Windows Media
- Windows Message Queuing
- Windows NT OS Kernel
- Windows Netlogon
- Windows Network Load Balancing
- Windows ODBC Driver
- Windows OLE
- Windows Online Certificate Status Protocol (OCSP Snap-In)
- Windows PGM
- Windows Partition Management Driver
- Windows Peer Name Resolution Protocol
- Windows Print Spooler Components
- Windows Remote Desktop
- Windows Remote Procedure Call
- Windows Routing and Remote Access Service (RRAS)
- Windows SPNEGO Extended Negotiation
- Windows Server Update Service
- Windows Smart-Screen
- Windows Transaction Manager
- Windows Update Orchestrator Service
- Windows VOLSNAP.SYS
- Windows Volume Shadow Copy
- Windows Win32K
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:
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.
July 12 - UPDATED TECHNICAL SUMMARY:
Microsoft has not released any patches for CVE-2023-36884. However, Microsoft has provided mitigation guidance that can be used to avoid exploitation. The provided guidance can be found below:
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.