CVE-2020-1147 PoC Affects Multiple Microsoft Products

CVE-2020-1147 PoC Affects Multiple Microsoft Products

An update to July's Critical Patches for Microsoft Products cybersecurity advisory was issued Tuesday, July 21, 2020. A working proof of concept (PoC) for the .NET Framework, SharePoint Server, and Visual Studio vulnerability (CVE-2020-1147) has been published by Steven Steeley.

What It Is:
Multiple vulnerabilities have been discovered in Microsoft products, the most severe of which could allow for remote code execution.

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.

Read the original Microsoft Security Bulletins below for more information:

Security Update Guide
July 2020 Security Updates
KB4569509: Guidance for DNS Server Vulnerability CVE-2020-1350

Threat Intelligence:
Updated 7/21/2020: A working proof of concept for the .NET Framework, SharePoint Server, and Visual Studio vulnerability (CVE-2020-1147) has been published by Steven Steeley.

Systems Affected:

• Microsoft Windows
• Microsoft Edge (EdgeHTML-based)
• Microsoft Edge (Chromium-based) in IE Mode
• Microsoft ChakraCore
• Internet Explorer
• Microsoft Office and Microsoft Office Services and Web Apps
• Windows Defender
• Skype for Business
• Visual Studio
• Microsoft OneDrive
• Open Source Software
• .NET Framework
• Azure DevOps

Risk:
Government:
• Large and medium government entities: High
• Small government entities: Medium
Businesses:
• Large and medium business entities: High
• Small business entities: Medium
Home users: Low

What It Means:
If you and/or your business utilize the Microsoft products mentioned above, you will need to apply appropriate patches or appropriate mitigations provided by Microsoft to vulnerable systems immediately following proper testing.

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 here.

What To Do:
We recommend the following actions be taken:

• Apply appropriate patches or appropriate mitigations provided by Microsoft to vulnerable systems immediately after appropriate testing.
• Run all software as a non-privileged user (one without administrative rights) to diminish the effects of a successful attack.
• Remind all users not to visit untrusted websites or follow links provided by unknown or untrusted sources.
• Inform and educate users regarding threats posed by hypertext links contained in emails or attachments especially from untrusted sources.
• Apply the Principle of Least Privilege to all systems and services.

Negative Consequences of Lost or Stolen Data:
The loss or theft of proprietary data can have severe impacts, particularly if the compromise becomes public and sensitive information is exposed. Possible impacts include:

• Temporary or permanent loss of sensitive or proprietary information.
• Disruption to regular operations.
• Financial losses incurred to restore systems and files.
• Potential harm to an organization’s reputation.

Should your agency or business need assistance with issues arising from vulnerabilities in Microsoft products including updates and/or patches, Dox can help. Please contact Dox if there is anything we can do to assist in securing your agency, business, or organization.

Thank you for your time and stay safe online.