Improper Restriction of Rendered UI Layers or Frames Affecting firefox-esr package, versions <91.4.1esr-1~deb11u1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.98% (85th percentile)

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  • Snyk IDSNYK-DEBIAN11-FIREFOXESR-1909753
  • published3 Nov 2021
  • disclosed8 Dec 2021

Introduced: 3 Nov 2021

CVE-2021-38508  (opens in a new tab)
CWE-1021  (opens in a new tab)

How to fix?

Upgrade Debian:11 firefox-esr to version 91.4.1esr-1~deb11u1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream firefox-esr package and not the firefox-esr package as distributed by Debian. See How to fix? for Debian:11 relevant fixed versions and status.

By displaying a form validity message in the correct location at the same time as a permission prompt (such as for geolocation), the validity message could have obscured the prompt, resulting in the user potentially being tricked into granting the permission. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.

CVSS Scores

version 3.1