Exposed Dangerous Method or Function Affecting firefox package, versions <0:68.2.0-2.el8_0


Severity

Recommended
critical

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.3% (71st percentile)

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  • Snyk IDSNYK-RHEL8-FIREFOX-3454642
  • published26 Jul 2021
  • disclosed22 Oct 2019

Introduced: 22 Oct 2019

CVE-2019-11761  (opens in a new tab)
CWE-749  (opens in a new tab)

How to fix?

Upgrade RHEL:8 firefox to version 0:68.2.0-2.el8_0 or higher.
This issue was patched in RHSA-2019:3196.

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.

By using a form with a data URI it was possible to gain access to the privileged JSONView object that had been cloned into content. Impact from exposing this object appears to be minimal, however it was a bypass of existing defense in depth mechanisms. This vulnerability affects Firefox < 70, Thunderbird < 68.2, and Firefox ESR < 68.2.

CVSS Scores

version 3.1