Microsoft Internet Explorer Vulnerability Discovered

Microsoft Internet Explorer Vulnerability Discovered

A cybersecurity alert was issued Saturday, Jan. 18, 2020, regarding a vulnerability in Microsoft Internet Explorer. The vulnerability could allow an attacker to execute arbitrary code, which could potentially lead to a breach.

What It Is:
A vulnerability has been discovered in Microsoft Internet Explorer, which could allow for arbitrary code execution. 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.

Read the original Microsoft Security Update Guide.

Threat Intelligence:
There are reports of limited CVE-2020-0674 exploitation in the wild.

Systems Affected:

• 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, 2008 R2, 2012, 2012 R2, 2016, 2019

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

What It Means:
If you and/or your business utilize the Microsoft Internet Explorer versions mentioned above, you will need to apply the workaround provided by the Microsoft Security Update Guide since there is currently no patch for this vulnerability. Once a patch is available from Microsoft, apply it to vulnerable systems following proper testing.

Technical Summary:
A vulnerability has been discovered in Microsoft Internet Explorer, which could allow for arbitrary code execution. The vulnerability occurs due to a memory corruption issue in the Internet Explorer Scripting Engine. In a web-based attack scenario, an attacker could convince a user to view a specially crafted website via Internet Explorer. The workaround addresses the vulnerability by modifying how the scripting engine handles objects in memory.

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

• Apply the mitigating workarounds provided by Microsoft, until patches are available, 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.