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CVE-2021-23960 Affecting firefox package, versions <85.0-1

0.0
high

Snyk CVSS

    Attack Complexity Low
    User Interaction Required
    Confidentiality High
    Integrity High
    Availability High

    Threat Intelligence

    EPSS 0.21% (60th percentile)
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NVD
8.8 high
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SUSE
6.1 medium
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Red Hat
8.8 high

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  • Snyk ID SNYK-DEBIANUNSTABLE-FIREFOX-1065067
  • published 27 Jan 2021
  • disclosed 26 Feb 2021
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Introduced: 27 Jan 2021

CVE-2021-23960 Open this link in a new tab

How to fix?

Upgrade Debian:unstable firefox to version 85.0-1 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 Debian. See How to fix? for Debian:unstable relevant fixed versions and status.

Performing garbage collection on re-declared JavaScript variables resulted in a user-after-poison, and a potentially exploitable crash. This vulnerability affects Firefox < 85, Thunderbird < 78.7, and Firefox ESR < 78.7.