Flaw Discovered in Adobe Flash Player

Flaw Discovered in Adobe Flash Player

A cybersecurity advisory was issued Wednesday, Nov. 21, 2018, regarding a vulnerability in Adobe Flash Player that could allow for arbitrary code execution. Successful exploitation of this vulnerability could allow a breach.

What It Is:
Adobe Flash Player is a widely distributed multimedia and application player used to enhance the user experience when visiting web pages or reading email messages. Successful exploitation of this vulnerability could result in the attacker gaining control of the affected system.

Depending on the privileges associated with this application, an attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. If this application has been configured to have fewer user rights on the system, exploitation of this vulnerability could have less impact than if it was configured with administrative rights.

See the Adobe Security Bulletin.

Threat Intelligence:
A Proof-of-Concept has been developed by the researchers who discovered this vulnerability to demonstrate this issue.

What It Means:
If your business or organization uses Microsoft Edge, you will need to install the updates after appropriate testing to prevent a possible security breach.

Systems Affected Include:
• Adobe Flash Player Desktop Runtime for Windows, Macintosh, and Linux versions and earlier
• Adobe Flash Player for Google Chrome versions and earlier
• Adobe Flash Player for Microsoft Edge and Internet Explorer 11 versions and earlier

• 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 Adobe Flash Player that could allow for arbitrary code execution. This vulnerability occurs due to the interpreter code of the Action Script Virtual Machine (AVM) not resetting a with-scope pointer when an exception is caught, leading later to a type confusion bug, and eventually to arbitrary code execution.

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

• Apply the update provided by Adobe to vulnerable systems immediately after appropriate testing.
• Enable click-to-play to require user interaction before enabling SWF content for Internet Explorer 7 and below.
• Enable read-only protected view for Microsoft Office.
• 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 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 un-trusted 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 any of the above products 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.