Important: thunderbird

Issue Overview:

By holding a reference to the eval() function from an about:blank window, a malicious webpage could have gained access to the InstallTrigger object which would allow them to prompt the user to install an extension. Combined with user confusion, this could result in an unintended or malicious extension being installed. (cve-2020-15664)
See: https://www.mozilla.org/en-US/security/advisories/mfsa2020-40/#CVE-2020-15664

When aborting an operation, such as a fetch, an abort signal may be deleted while alerting the objects to be notified. This results in a use-after-free and we presume that with enough effort it could have been exploited to run arbitrary code. (cve-2020-15669)
See: https://www.mozilla.org/en-US/security/advisories/mfsa2020-40/#CVE-2020-15669

Affected Packages:

thunderbird

Note:

This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.

Issue Correction:
Run yum update thunderbird to update your system.

New Packages:

aarch64:  
    thunderbird-68.12.0-1.amzn2.aarch64  
    thunderbird-debuginfo-68.12.0-1.amzn2.aarch64  
  
src:  
    thunderbird-68.12.0-1.amzn2.src  
  
x86_64:  
    thunderbird-68.12.0-1.amzn2.x86_64  
    thunderbird-debuginfo-68.12.0-1.amzn2.x86_64  

Additional References

Red Hat: CVE-2020-15664, CVE-2020-15669

Mitre: CVE-2020-15664, CVE-2020-15669