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Cross-site Scripting (XSS) Affecting firefox package, versions <0:52.4.0-1.el7_4

Severity

 Recommended
critical

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.39% (73rd percentile)

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  • Snyk IDSNYK-RHEL7-FIREFOX-4748468
  • published26 Jul 2021
  • disclosed28 Sept 2017
Report a new vulnerability Found a mistake?

Introduced: 28 Sep 2017

CVE-2017-7823  (opens in a new tab)
CWE-79  (opens in a new tab)

How to fix?

Upgrade RHEL:7 firefox to version 0:52.4.0-1.el7_4 or higher.
This issue was patched in RHSA-2017:2831.

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:7 relevant fixed versions and status.

The content security policy (CSP) "sandbox" directive did not create a unique origin for the document, causing it to behave as if the "allow-same-origin" keyword were always specified. This could allow a Cross-Site Scripting (XSS) attack to be launched from unsafe content. This vulnerability affects Firefox < 56, Firefox ESR < 52.4, and Thunderbird < 52.4.