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Improper Restriction of Rendered UI Layers or Frames Affecting firefox-esr package, versions <91.3.0esr-1

0.0
medium

Snyk CVSS

    Attack Complexity Low
    User Interaction Required

    Threat Intelligence

    EPSS 0.11% (43rd percentile)
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NVD
4.3 medium
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SUSE
7.5 high
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Red Hat
7.5 high

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  • Snyk ID SNYK-DEBIAN10-FIREFOXESR-1909750
  • published 3 Nov 2021
  • disclosed 8 Dec 2021
Report a new vulnerability Found a mistake?

Introduced: 3 Nov 2021

CVE-2021-38506 Open this link in a new tab
CWE-1021 Open this link in a new tab

How to fix?

Upgrade Debian:10 firefox-esr to version 91.3.0esr-1 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:10 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.