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Use After Free Affecting firefox-esr package, versions <68.6.1esr-1

0.0
high

Snyk CVSS

    Attack Complexity High
    Confidentiality High
    Integrity High
    Availability High

    Threat Intelligence

    Exploit Maturity Mature
    EPSS 2.36% (90th percentile)
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NVD
8.1 high
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SUSE
8.8 high
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Red Hat
8.8 high

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  • Snyk ID SNYK-DEBIAN12-FIREFOXESR-1546471
  • published 3 Apr 2020
  • disclosed 24 Apr 2020
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Introduced: 3 Apr 2020

CVE-2020-6819 Open this link in a new tab
CWE-416 Open this link in a new tab

How to fix?

Upgrade Debian:12 firefox-esr to version 68.6.1esr-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream firefox-esr package and not the firefox-esr package as distributed by Debian. See How to fix? for Debian:12 relevant fixed versions and status.

Under certain conditions, when running the nsDocShell destructor, 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.