Use After Free Affecting firefox package, versions <0:68.6.1-1.el8_1


Severity

Recommended
critical

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

Exploit Maturity
Mature
EPSS
0.89% (84th percentile)

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  • Snyk IDSNYK-RHEL8-FIREFOX-3649503
  • published26 Jul 2021
  • disclosed3 Apr 2020

Introduced: 3 Apr 2020

CVE-2020-6820  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade RHEL:8 firefox to version 0:68.6.1-1.el8_1 or higher.
This issue was patched in RHSA-2020:1341.

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.

Under certain conditions, when handling a ReadableStream, a race condition can cause a use-after-free. We are aware of targeted attacks in the wild abusing this flaw. This vulnerability affects Thunderbird < 68.7.0, Firefox < 74.0.1, and Firefox ESR < 68.6.1.

CVSS Scores

version 3.1