Improper Validation of Integrity Check Value Affecting firefox package, versions <0:78.5.0-1.el8_3


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.08% (37th percentile)

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  • Snyk IDSNYK-RHEL8-FIREFOX-3909837
  • published26 Jul 2021
  • disclosed17 Nov 2020

Introduced: 17 Nov 2020

CVE-2020-26951  (opens in a new tab)
CWE-354  (opens in a new tab)

How to fix?

Upgrade RHEL:8 firefox to version 0:78.5.0-1.el8_3 or higher.
This issue was patched in RHSA-2020:5237.

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.

A parsing and event loading mismatch in Firefox's SVG code could have allowed load events to fire, even after sanitization. An attacker already capable of exploiting an XSS vulnerability in privileged internal pages could have used this attack to bypass our built-in sanitizer. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.

CVSS Scores

version 3.1