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Critical Patches Issued for Microsoft Products, May 14, 2019

MS-ISAC ADVISORY NUMBER:

2019-053

DATE(S) ISSUED:

05/14/2019

OVERVIEW:

Multiple vulnerabilities have been discovered in Microsoft products, the most severe of which could allow for 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.

**May 16 – UPDATED OVERVIEW:
Microsoft has released an additional bulletin highlighting a Critical level vulnerability affecting Windows 7 systems and below (CVE-2019-0708).

THREAT INTELLIGENCE:

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

June 6 – UPDATED THREAT INTELLIGENCE:
Metasploit module scanning for systems vulnerable to CVE-2019-0708 is currently available.

SYSTEMS AFFECTED:

  • Team Foundation Server
  • Adobe Flash Player
  • Microsoft Windows
  • Internet Explorer
  • Microsoft Edge
  • Microsoft Office and Microsoft Office Services and Web Apps
  • Visual Studio
  • Azure DevOps Server
  • SQL Server
  • .NET Framework
  • .NET Core
  • ASP .NET Core
  • ChakraCore
  • Online Services
  • Azure
  • NuGet
  • Skype for Android
  • May 16 - UPDATED SYSTEMS AFFECTED: Windows 7
  • May 16 - UPDATED SYSTEMS AFFECTED: Windows Server 2008
  • May 16 - UPDATED SYSTEMS AFFECTED: Windows Server 2008 R2
  • May 16 - UPDATED SYSTEMS AFFECTED: Windows 2003
  • May 16 - UPDATED SYSTEMS AFFECTED: Windows XP

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

TECHNICAL SUMMARY:

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

A full list of all vulnerabilities can be found at the link below:
https://portal.msrc.microsoft.com/en-us/security-guidance

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.

**May 16 – UPDATED TECHINICAL SUMMARY:
Microsoft has released an additional bulletin highlighting a Critical level vulnerability affecting Windows 7 systems and below (CVE-2019-0708). This vulnerability exploits the Remote Desktop Protocol and allows for an unauthenticated attacker to connect to a system by sending specially crafted requests. Successful exploitation of this vulnerability could allow for remote code execution. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.

NOTE: This vulnerability was fixed in the May 14th patches released by Microsoft.

**For more information on this vulnerability please reference the Microsoft Advisory below:
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0708

RECOMMENDATIONS:

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.

REFERENCES:

Information Hub : Advisories


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Pencil Blog post 18 Jul 2019
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