Time-of-check Time-of-use (TOCTOU) Affecting firefox package, versions <0:91.7.0-3.el8_4


Severity

Recommended
critical

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.23% (63rd percentile)

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  • Snyk IDSNYK-RHEL8-FIREFOX-4158544
  • published10 Mar 2022
  • disclosed8 Mar 2022

Introduced: 8 Mar 2022

CVE-2022-26387  (opens in a new tab)
CWE-367  (opens in a new tab)

How to fix?

Upgrade RHEL:8 firefox to version 0:91.7.0-3.el8_4 or higher.
This issue was patched in RHSA-2022:0817.

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.

When installing an add-on, Firefox verified the signature before prompting the user; but while the user was confirming the prompt, the underlying add-on file could have been modified and Firefox would not have noticed. This vulnerability affects Firefox < 98, Firefox ESR < 91.7, and Thunderbird < 91.7.

CVSS Scores

version 3.1