Improper Restriction of Rendered UI Layers or Frames Affecting thunderbird-debuginfo package, versions <0:78.6.0-1.amzn2


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.12% (48th percentile)

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  • Snyk IDSNYK-AMZN2-THUNDERBIRDDEBUGINFO-1693186
  • published27 Sept 2021
  • disclosed9 Dec 2020

Introduced: 9 Dec 2020

CVE-2020-26953  (opens in a new tab)
CWE-1021  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2 thunderbird-debuginfo to version 0:78.6.0-1.amzn2 or higher.
This issue was patched in ALAS2-2021-1586.

NVD Description

Note: Versions mentioned in the description apply only to the upstream thunderbird-debuginfo package and not the thunderbird-debuginfo package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 relevant fixed versions and status.

It was possible to cause the browser to enter fullscreen mode without displaying the security UI; thus making it possible to attempt a phishing attack or otherwise confuse the user. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.

CVSS Scores

version 3.1