Improper Restriction of Rendered UI Layers or Frames Affecting firefox package, versions <0:91.3.0-1.el8_4.alma


Severity

Recommended
high

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.62% (80th percentile)

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  • Snyk IDSNYK-ALMALINUX8-FIREFOX-5610372
  • published28 May 2023
  • disclosed4 Nov 2021

Introduced: 4 Nov 2021

CVE-2021-38506  (opens in a new tab)
CWE-1021  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:8 firefox to version 0:91.3.0-1.el8_4.alma or higher.
This issue was patched in ALSA-2021:4123.

NVD Description

Note: Versions mentioned in the description apply only to the upstream firefox package and not the firefox package as distributed by AlmaLinux. See How to fix? for AlmaLinux:8 relevant fixed versions and status.

Through a series of navigations, Firefox could have entered fullscreen mode without notification or warning to the user. This could lead to spoofing attacks on the browser UI including phishing. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.

CVSS Scores

version 3.1