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


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.62% (80th percentile)

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  • Snyk IDSNYK-RHEL8-FIREFOX-4160055
  • published3 Nov 2021
  • disclosed2 Nov 2021

Introduced: 2 Nov 2021

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

How to fix?

Upgrade RHEL:8 firefox to version 0:91.3.0-1.el8_4 or higher.
This issue was patched in RHSA-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 RHEL. See How to fix? for RHEL: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