Use After Free Affecting firefox package, versions <84.0-1


0.0
critical

Snyk CVSS

    Attack Complexity Low
    Confidentiality High
    Integrity High
    Availability High

    Threat Intelligence

    EPSS 0.24% (64th percentile)
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NVD
9.8 critical

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  • Snyk ID SNYK-DEBIANUNSTABLE-FIREFOX-1051639
  • published 16 Dec 2020
  • disclosed 7 Jan 2021

How to fix?

Upgrade Debian:unstable firefox to version 84.0-1 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.

The lifecycle of IPC Actors allows managed actors to outlive their manager actors; and the former must ensure that they are not attempting to use a dead actor they have a reference to. Such a check was omitted in WebGL, resulting in a use-after-free and a potentially exploitable crash. This vulnerability affects Firefox < 84.

References