ALAS2-2020-1496

Related Vulnerabilities: CVE-2020-15664   CVE-2020-15669  

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%2D2020%2D15664 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%2D2020%2D15669

ALAS2-2020-1496


Amazon Linux 2 Security Advisory: ALAS-2020-1496
Advisory Release Date: 2020-09-28 22:12 Pacific
Advisory Updated Date: 2020-09-30 22:12 Pacific
Severity: Important

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%2D2020%2D15664

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%2D2020%2D15669


Affected Packages:

thunderbird


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