Use-after-free in Mozilla Firefox and Firefox ESR - CVE-2021-29970

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Main Vulnerability Database Vulnerabilities #VU54678

Use-after-free in Mozilla Firefox and Firefox ESR - CVE-2021-29970

Published: July 13, 2021


Vulnerability identifier: #VU54678
CSH Severity: High
CVSS v4 BT: 6.1 [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/E:U/U:Amber]
CVE-ID: CVE-2021-29970
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 accessibility features when processing HTML content. A remote attacker can track 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 Manager Server
SUSE Manager Retail Branch Server
SUSE Manager Proxy
SUSE CaaS Platform
SUSE Enterprise Storage
CentOS
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for Power, big endian
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for ARM 64
SUSE OpenStack Cloud Crowbar
SUSE OpenStack Cloud
Red Hat Enterprise Linux for x86_64
HPE Helion Openstack
Anolis OS
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - 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 - TUS
Red Hat Enterprise Linux Server - AUS
SUSE Linux Enterprise Debuginfo
SUSE Linux Enterprise Server
SUSE Linux Enterprise Server for SAP
SUSE Linux Enterprise Software Development Kit
SUSE Linux Enterprise High Performance Computing
SUSE Linux Enterprise Workstation Extension
Ubuntu
openEuler
Red Hat Enterprise Linux Server for x86_64 - Update Services for SAP Solutions
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
firefox-esr (Debian package)
thunderbird (Debian package)
firefox (Red Hat package)
thunderbird (Red Hat package)
firefox
thunderbird
MozillaFirefox-translations-other
MozillaFirefox-translations-common
MozillaFirefox-devel
MozillaFirefox-debugsource
MozillaFirefox-debuginfo
MozillaFirefox
MozillaThunderbird-translations-common
MozillaThunderbird-translations-other
MozillaThunderbird-debugsource
MozillaThunderbird
MozillaThunderbird-debuginfo
thunderbird (Ubuntu package)
mozilla-crashreporter-firefox-debuginfo
firefox-debugsource
firefox-debuginfo
firefox (Ubuntu package)
mail-client/thunderbird-bin
mail-client/thunderbird
IBM Cloud Application Performance Management (APM)
Mozilla Thunderbird

How to mitigate CVE-2021-29970

Install updates from vendor's website.

Mozilla Firefox - update to 90.0
Firefox ESR - update to 78.12.0
Mozilla Thunderbird - update to 78.12.0
firefox-esr (Debian package) - update to 78.12.0esr-1~deb10u1
thunderbird (Debian package) - update to 1:78.12.0-1~deb10u1
firefox (Red Hat package) - addressed in versions 78.12.0-1.el7_9, 78.12.0-1.el8_1, 78.12.0-1.el8_2, 78.12.0-1.el8_4
thunderbird (Red Hat package) - addressed in versions 78.12.0-2.el7_9, 78.12.0-2.el8_1, 78.12.0-2.el8_2, 78.12.0-3.el8_4
firefox - update to 78.12.0-1.0.1
thunderbird - addressed in versions 78.12.0-2.0.1, 91.6.0-1.0.1
MozillaFirefox-translations-other - addressed in versions 78.12.0-3.147.1, 78.12.0-78.134.1
MozillaFirefox-translations-common - addressed in versions 78.12.0-3.147.1, 78.12.0-78.134.1, 78.12.0-112.65.1
MozillaFirefox-devel - addressed in versions 78.12.0-3.147.1, 78.12.0-112.65.1
MozillaFirefox-debugsource - addressed in versions 78.12.0-3.147.1, 78.12.0-112.65.1
MozillaFirefox-debuginfo - addressed in versions 78.12.0-3.147.1, 78.12.0-78.134.1, 78.12.0-112.65.1
MozillaFirefox - addressed in versions 78.12.0-3.147.1, 78.12.0-78.134.1, 78.12.0-112.65.1
MozillaThunderbird-translations-common - update to 78.12.0-8.33.1
MozillaThunderbird-translations-other - update to 78.12.0-8.33.1
MozillaThunderbird-debugsource - update to 78.12.0-8.33.1
MozillaThunderbird - update to 78.12.0-8.33.1
MozillaThunderbird-debuginfo - update to 78.12.0-8.33.1
thunderbird (Ubuntu package) - addressed in versions 1:78.13.0+build1-0ubuntu0.18.04.1, 1:78.13.0+build1-0ubuntu0.20.04.2, 1:78.13.0+build1-0ubuntu0.21.04.2
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 (Ubuntu package) - addressed in versions 90.0+build1-0ubuntu0.18.04.1, 90.0+build1-0ubuntu0.20.04.1, 90.0+build1-0ubuntu0.20.10.1, 90.0+build1-0ubuntu0.21.04.1
mail-client/thunderbird-bin - update to 91.12.0
mail-client/thunderbird - update to 91.12.0

External References

Related Security Bulletins