Race Condition Affecting firefox package, versions <0:91.4.0-1.0.1.el7_9


Severity

Recommended
high

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.69% (81st percentile)

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  • Snyk IDSNYK-ORACLE7-FIREFOX-2597306
  • published10 Apr 2022
  • disclosed8 Dec 2021

Introduced: 8 Dec 2021

CVE-2021-43538  (opens in a new tab)
CWE-362  (opens in a new tab)

How to fix?

Upgrade Oracle:7 firefox to version 0:91.4.0-1.0.1.el7_9 or higher.
This issue was patched in ELSA-2021-5014.

NVD Description

Note: Versions mentioned in the description apply only to the upstream firefox package and not the firefox package as distributed by Oracle. See How to fix? for Oracle:7 relevant fixed versions and status.

By misusing a race in our notification code, an attacker could have forcefully hidden the notification for pages that had received full screen and pointer lock access, which could have been used for spoofing attacks. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.

CVSS Scores

version 3.1