Use-after-free in Mozilla Firefox and Firefox ESR - CVE-2021-43539

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Main Vulnerability Database Vulnerabilities #VU58608

Use-after-free in Mozilla Firefox and Firefox ESR - CVE-2021-43539

Published: December 7, 2021


Vulnerability identifier: #VU58608
CSH Severity: High
CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-43539
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error in GC rooting when calling wasm instance methods. A remote attacker can trick the victim to open a specially crafted web page, trigger a use-after-free error and execute arbitrary code on the system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.


Affected software

Mozilla Firefox
Firefox ESR
Arch Linux
Gentoo Linux
SUSE CaaS Platform
SUSE Enterprise Storage
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, big endian
Red Hat Enterprise Linux for Power, little endian
CentOS
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for ARM 64
HPE Helion Openstack
SUSE OpenStack Cloud
SUSE OpenStack Cloud Crowbar
Anolis OS
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
SUSE Linux Enterprise Debuginfo
SUSE Linux Enterprise Server
Oracle Solaris
SUSE Linux Enterprise Server for SAP
SUSE Linux Enterprise Software Development Kit
SUSE Linux Enterprise High Performance Computing
SUSE Linux Enterprise Module for Desktop Applications
SUSE Linux Enterprise Workstation Extension
Ubuntu
openEuler
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
Red Hat Enterprise Linux Server for x86_64 - Update Services for SAP Solutions
firefox-esr (Debian package)
thunderbird (Red Hat package)
firefox (Red Hat package)
mozilla-crashreporter-firefox-debuginfo
firefox-debugsource
firefox-debuginfo
firefox
thunderbird
MozillaThunderbird-debuginfo
MozillaThunderbird-translations-common
MozillaThunderbird-debugsource
MozillaThunderbird
MozillaThunderbird-translations-other
MozillaFirefox-debuginfo
MozillaFirefox-translations-other
MozillaFirefox-translations-common
MozillaFirefox
MozillaFirefox-debugsource
MozillaFirefox-devel
thunderbird (Debian package)
thunderbird (Ubuntu package)
mail-client/thunderbird-bin
mail-client/thunderbird
firefox (Ubuntu package)
Mozilla Thunderbird
IBM Cloud Pak for Multicloud Management Monitoring

How to mitigate CVE-2021-43539

Install updates from vendor's website.

Mozilla Firefox - update to 95.0
Firefox ESR - update to 91.4.0
firefox-esr (Debian package) - update to 91.4.1esr-1~deb11u1
Mozilla Thunderbird - update to 91.4.0
thunderbird (Red Hat package) - addressed in versions 91.4.0-2.el8_1, 91.4.0-2.el8_2, 91.4.0-2.el8_4, 91.4.0-2.el8_5, 91.4.0-3.el7_9
firefox (Red Hat package) - addressed in versions 91.4.0-1.el7_9, 91.4.0-1.el8_1, 91.4.0-1.el8_2, 91.4.0-1.el8_4, 91.4.0-1.el8_5
IBM Cloud Pak for Multicloud Management Monitoring - update to 2.3 Fix Pack 6
mozilla-crashreporter-firefox-debuginfo - update to 79.0-34
firefox-debugsource - update to 79.0-34
firefox-debuginfo - update to 79.0-34
firefox - update to 79.0-34
firefox - update to 91.4.0-1.0.1
thunderbird - update to 91.4.0-2.0.1
MozillaThunderbird-debuginfo - update to 91.4.0-8.45.2
MozillaThunderbird-translations-common - update to 91.4.0-8.45.2
MozillaThunderbird-debugsource - update to 91.4.0-8.45.2
MozillaThunderbird - update to 91.4.0-8.45.2
MozillaThunderbird-translations-other - update to 91.4.0-8.45.2
MozillaFirefox-debuginfo - addressed in versions 91.4.0-78.154.1, 91.4.0-112.83.1, 91.4.0-150.9.1, 91.4.0-152.9.1
MozillaFirefox-translations-other - addressed in versions 91.4.0-78.154.1, 91.4.0-150.9.1, 91.4.0-152.9.1
MozillaFirefox-translations-common - addressed in versions 91.4.0-78.154.1, 91.4.0-112.83.1, 91.4.0-150.9.1, 91.4.0-152.9.1
MozillaFirefox - addressed in versions 91.4.0-78.154.1, 91.4.0-112.83.1, 91.4.0-150.9.1, 91.4.0-152.9.1
MozillaFirefox-debugsource - addressed in versions 91.4.0-112.83.1, 91.4.0-150.9.1, 91.4.0-152.9.1
MozillaFirefox-devel - addressed in versions 91.4.0-112.83.1, 91.4.0-150.9.1, 91.4.0-152.9.1
thunderbird (Debian package) - addressed in versions 1:91.4.1-1~deb10u1, 1:91.4.1-1~deb11u1
thunderbird (Ubuntu package) - addressed in versions 1:91.5.0+build1-0ubuntu0.18.04.1, 1:91.5.0+build1-0ubuntu0.20.04.1, 1:91.5.0+build1-0ubuntu0.21.10.1
mail-client/thunderbird-bin - update to 91.12.0
mail-client/thunderbird - update to 91.12.0
firefox (Ubuntu package) - addressed in versions 95.0+build1-0ubuntu0.18.04.1, 95.0+build1-0ubuntu0.20.04.1, 95.0+build1-0ubuntu0.21.04.1, 95.0+build1-0ubuntu0.21.10.1, 95.0.1+build2-0ubuntu0.18.04.1, 95.0.1+build2-0ubuntu0.20.04.1, 95.0.1+build2-0ubuntu0.21.04.1, 95.0.1+build2-0ubuntu0.21.10.1

External References

Related Security Bulletins