Use After Free Affecting firefox package, versions <0:91.4.0-1.el7_9


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.68% (80th percentile)

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  • Snyk IDSNYK-RHEL7-FIREFOX-8016050
  • published17 Sept 2024
  • disclosed7 Dec 2021

Introduced: 7 Dec 2021

CVE-2021-43539  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade RHEL:7 firefox to version 0:91.4.0-1.el7_9 or higher.
This issue was patched in RHSA-2021:5014.

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.

Failure to correctly record the location of live pointers across wasm instance calls resulted in a GC occurring within the call not tracing those live pointers. This could have led to a use-after-free causing a potentially exploitable crash. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.

CVSS Scores

version 3.1