Cross-site Scripting (XSS) Affecting firefox package, versions <0:68.4.1-1.el6_10


Severity

Recommended
critical

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.31% (71st percentile)

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  • Snyk IDSNYK-RHEL6-FIREFOX-1524209
  • published26 Jul 2021
  • disclosed7 Jan 2020

Introduced: 7 Jan 2020

CVE-2019-17016  (opens in a new tab)
CWE-79  (opens in a new tab)

How to fix?

Upgrade RHEL:6 firefox to version 0:68.4.1-1.el6_10 or higher.
This issue was patched in RHSA-2020:0086.

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:6 relevant fixed versions and status.

When pasting a &lt;style&gt; tag from the clipboard into a rich text editor, the CSS sanitizer incorrectly rewrites a @namespace rule. This could allow for injection into certain types of websites resulting in data exfiltration. This vulnerability affects Firefox ESR < 68.4 and Firefox < 72.

CVSS Scores

version 3.1