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Incorrect Type Conversion or Cast Affecting firefox-esr package, versions <91.4.0esr-1

0.0
high

Snyk CVSS

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

    Threat Intelligence

    EPSS 0.4% (74th percentile)
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NVD
8.8 high
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SUSE
7.5 high
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Red Hat
8.8 high

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  • Snyk ID SNYK-DEBIANUNSTABLE-FIREFOXESR-2311980
  • published 8 Dec 2021
  • disclosed 8 Dec 2021
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Introduced: 8 Dec 2021

CVE-2021-43537 Open this link in a new tab
CWE-704 Open this link in a new tab

How to fix?

Upgrade Debian:unstable firefox-esr to version 91.4.0esr-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:unstable relevant fixed versions and status.

An incorrect type conversion of sizes from 64bit to 32bit integers allowed an attacker to corrupt memory leading to a potentially exploitable crash. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.