New Vulnerability Found in Microsoft Internet Explorer

New Vulnerability Found in Microsoft Internet Explorer

A cybersecurity update was issued by Microsoft on Dec. 19, 2018, regarding a new vulnerability in Internet Explorer that could allow for arbitrary code execution. Successful exploitation of this vulnerability could allow a breach. Updates are available.

What It Is:
Microsoft Internet Explorer is a web browser available for Microsoft Windows. Successful exploitation of this vulnerability could allow for arbitrary code execution. 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.

See the original Microsoft Security Update and the Microsoft Update Guide.

Threat Intelligence:
There are reports of this vulnerability being exploited in the wild.

What It Means:
If your business or organization uses Microsoft Internet Explorer, you will need to install the updates issued by Mircosoft immediately after testing to address this vulnerability in order to prevent a possible security breach.

Systems Affected Include:

• Internet Explorer 8 for Windows Embedded Standard 2009 XP, POSReady 2009
• Internet Explorer 9 for Windows Server 2008
• Internet Explorer 10 for Windows Server 2012
• Internet Explorer 11 for Windows 7, 8.1, RT 8.1, 10
• Internet Explorer 11 for Windows Server 2008 R2, 2012 R2, 2016, 2019

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

Technical Summary:
A vulnerability has been discovered in Microsoft Internet Explorer, which could allow for arbitrary code execution. In a web-based attack scenario, an attacker could host a specially crafted website that is designed to exploit the vulnerability through Internet Explorer and then convince a user to view the website, for example, by sending an email. The security update addresses the vulnerability by modifying how the scripting engine handles objects in memory.

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

• Install updates provided by Microsoft, when available, 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 untrusted websites or follow links provided by unknown or untrusted sources.
• Inform and educate users regarding the 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 Include:
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 the detection of vulnerabilities in Microsoft Internet Explorer or updates to include 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.