Information Exposure Affecting firefox package, versions <0:91.4.0-1.el8_5


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
1.56% (88th percentile)

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  • Snyk IDSNYK-RHEL8-FIREFOX-4174535
  • published8 Dec 2021
  • disclosed7 Dec 2021

Introduced: 7 Dec 2021

CVE-2021-43542  (opens in a new tab)
CWE-209  (opens in a new tab)

How to fix?

Upgrade RHEL:8 firefox to version 0:91.4.0-1.el8_5 or higher.
This issue was patched in RHSA-2021:5013.

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.

Using XMLHttpRequest, an attacker could have identified installed applications by probing error messages for loading external protocols. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.

CVSS Scores

version 3.1