Improper Restriction of Rendered UI Layers or Frames Affecting firefox package, versions <0:91.2.0-4.el7_9


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.2% (58th percentile)

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  • Snyk IDSNYK-RHEL7-FIREFOX-1728495
  • published6 Oct 2021
  • disclosed5 Oct 2021

Introduced: 5 Oct 2021

CVE-2021-38497  (opens in a new tab)
CWE-1021  (opens in a new tab)

How to fix?

Upgrade RHEL:7 firefox to version 0:91.2.0-4.el7_9 or higher.
This issue was patched in RHSA-2021:3791.

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:7 relevant fixed versions and status.

Through use of reportValidity() and window.open(), a plain-text validation message could have been overlaid on another origin, leading to possible user confusion and spoofing attacks. This vulnerability affects Firefox < 93, Thunderbird < 91.2, and Firefox ESR < 91.2.

CVSS Scores

version 3.1