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HomeResourcesAdvisoriesCritical Patches Issued for Microsoft Products, May 09, 2017

Critical Patches Issued for Microsoft Products, May 09, 2017

MS-ISAC ADVISORY NUMBER:

2017-046

DATE(S) ISSUED:

05/09/2017

OVERVIEW:

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.

THREAT INTELLIGENCE:

There are reports that some of these vulnerabilities are actively being exploited.

SYSTEMS AFFECTED:

  • Microsoft Internet Explorer 9, 10, 11
  • Microsoft Edge
  • Microsoft Windows: Vista, 7, 8.1, RT 8.1, 10
  • Microsoft Windows Server: 2008, 2008 R2, 2012, 2012 R2, 2016
  • Microsoft Windows Server Core Installations: 2008, 2008 R2, 2012, 2012 R2, 2016
  • Microsoft Office 2007, 2010, 2013, 2016
  • Microsoft .NET Framework
  • Skype for Business 2016

RISK:

Goverment:
  • 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:

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.

RECOMENDATIONS:

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 privileges) to diminish the effects of a successful attack.
  • Remind users not to visit un-trusted websites or follow links provided by unknown or un-trusted sources.
  • Inform and educate users regarding threats posed by hypertext links contained in emails or attachments especially from un-trusted sources.
  • Apply the Principle of Least Privilege to all systems and services.

REFERENCES: