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Use After Free Affecting firefox package, versions <66.0+build3-0ubuntu1

Severity

 Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.88% (84th percentile)

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  • Snyk IDSNYK-UBUNTU2004-FIREFOX-584027
  • published20 Mar 2019
  • disclosed26 Apr 2019
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Introduced: 20 Mar 2019

CVE-2019-9796  (opens in a new tab)
CWE-416  (opens in a new tab)
First added by Snyk

How to fix?

Upgrade Ubuntu:20.04 firefox to version 66.0+build3-0ubuntu1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream firefox package and not the firefox package as distributed by Ubuntu. See How to fix? for Ubuntu:20.04 relevant fixed versions and status.

A use-after-free vulnerability can occur when the SMIL animation controller incorrectly registers with the refresh driver twice when only a single registration is expected. When a registration is later freed with the removal of the animation controller element, the refresh driver incorrectly leaves a dangling pointer to the driver's observer array. This vulnerability affects Thunderbird < 60.6, Firefox ESR < 60.6, and Firefox < 66.