Cross-site Scripting (XSS) Affecting firefox package, versions <0:68.4.1-1.el8_1


Severity

Recommended
critical

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.24% (65th percentile)

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  • Snyk IDSNYK-RHEL8-FIREFOX-3649938
  • published26 Jul 2021
  • disclosed7 Jan 2020

Introduced: 7 Jan 2020

CVE-2019-17022  (opens in a new tab)
CWE-79  (opens in a new tab)

How to fix?

Upgrade RHEL:8 firefox to version 0:68.4.1-1.el8_1 or higher.
This issue was patched in RHSA-2020:0111.

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 pasting a &lt;style&gt; tag from the clipboard into a rich text editor, the CSS sanitizer does not escape &lt; and &gt; characters. Because the resulting string is pasted directly into the text node of the element this does not result in a direct injection into the webpage; however, if a webpage subsequently copies the node's innerHTML, assigning it to another innerHTML, this would result in an XSS vulnerability. Two WYSIWYG editors were identified with this behavior, more may exist. This vulnerability affects Firefox ESR < 68.4 and Firefox < 72.

CVSS Scores

version 3.1