Security updates available for Flash Player | APSB18-39
Bulletin ID Date Published Priority
APSB18-39 November 13, 2018  2

Summary

Adobe has released security updates for Adobe Flash Player for Windows, macOS, Linux and Chrome OS. These updates address an important vulnerability in Adobe Flash Player 31.0.0.122 and earlier versions.  Successful exploitation could lead to information disclosure.

Affected Product Versions

1Product Version Platform
Adobe Flash Player Desktop Runtime 31.0.0.122 and earlier versions Windows, macOS and Linux
Adobe Flash Player for Google Chrome 31.0.0.122 and earlier versions Windows, macOS, Linux and Chrome OS 
Adobe Flash Player for Microsoft Edge and Internet Explorer 11 31.0.0.122 and earlier versions Windows 10 and 8.1

To verify the version of Adobe Flash Player installed on your system, access the About Flash Player page, or right- click on content running in Flash Player and select "About Adobe (or Macromedia) Flash Player" from the menu. If you use multiple browsers, perform the check for each browser you have installed on your system.

Solution

Adobe categorizes these updates with the following priority ratings and recommends users update their installation to the latest version:

Product Version Platform Priority Availability
Adobe Flash Player Desktop Runtime 31.0.0.148 Windows, macOS 2

Flash Player Download Center

Flash Player Distribution

Adobe Flash Player for Google Chrome 31.0.0.148 Windows, macOS, Linux, and Chrome OS  2 Google Chrome Releases
Adobe Flash Player for Microsoft Edge and Internet Explorer 11 31.0.0.148 Windows 10 and 8.1 2 Microsoft Security Advisory
Adobe Flash Player Desktop Runtime 31.0.0.148 Linux 3 Flash Player Download Center

Note:

  • Adobe recommends users of the Adobe Flash Player Desktop Runtime for Windows, macOS and Linux update to Adobe Flash Player 31.0.0.148 via the update mechanism within the product [1] or by visiting the Adobe Flash Player Download Center.
  • Adobe Flash Player installed with Google Chrome will be automatically updated to the latest Google Chrome version, which will include Adobe Flash Player 31.0.0.148 for Windows, macOS, Linux and Chrome OS.
  • Adobe Flash Player installed with Microsoft Edge and Internet Explorer 11 for Windows 10 and 8.1 will be automatically updated to the latest version, which will include Adobe Flash Player 31.0.0.148.
  • Please visit the Flash Player Help page for assistance in installing Flash Player.

[1] Users who have selected the option to 'Allow Adobe to install updates' will receive the update automatically. Users who do not have the 'Allow Adobe to install updates' option enabled can install the update via the update mechanism within the product when prompted.

Vulnerability details

Vulnerability Category Vulnerability Impact Severity CVE Number
Out-of-bounds Read Information Disclosure Important CVE-2018-15978

Acknowledgments

Adobe would like to thank @j00sean for notifying us of this issue and for working with Adobe to help protect our customers.