The impact of this issue announcement is medium – high. Please act accordingly to rectify the issue, as stated below.
- Adobe Flash Player Desktop Runtime for Windows and macOS versions prior to 188.8.131.523
- Adobe Flash Player Desktop Runtime for Linux versions prior to 184.108.40.2063
- Adobe Flash Player for Google Chrome for Windows, macOS, Linux and Chrome OS versions prior to 220.127.116.113
- Adobe Flash Player for Microsoft Edge and Internet Explorer 11 for Windows 10 and 8.1 versions prior to 18.104.22.1687
What you need to know:
A NULL Pointer Dereference vulnerability was discovered in Adobe Flash Player, which could allow for arbitrary code execution. Exploitation of CVE-2020-9746 requires an attacker to insert malicious strings in an HTTP response that is by default delivered over TLS/SSL. 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 were configured with administrative rights.
Actions to be taken:
- Install the updates provided by Adobe 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 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.
What is the impact of not doing the actions?
Successful exploitation of this vulnerability could result in an attacker executing arbitrary code in the context of the affected application.