Memory corruption in Firefox ESR and Mozilla Firefox - CVE-2021-38500

Vulnerability identifier: #VU57065

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-2021-38500

CWE-ID: CWE-119

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing HTML content. A remote attacker can trick the victim to visit a specially crafted web page, trigger a memory corruption and execute arbitrary code on the system.

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

Firefox ESR
Mozilla Firefox
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 for IBM z Systems
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for ARM 64
SUSE OpenStack Cloud Crowbar
SUSE OpenStack Cloud
HPE Helion Openstack
Anolis OS
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux for ARM 64 - 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
SUSE Linux Enterprise Module for Desktop Applications
Ubuntu
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 (Red Hat package)
MozillaFirefox
MozillaFirefox-translations-other
MozillaFirefox-translations-common
MozillaFirefox-devel
MozillaFirefox-debugsource
MozillaFirefox-debuginfo
firefox (Red Hat package)
thunderbird (Ubuntu package)
MozillaThunderbird-translations-common
MozillaThunderbird-debugsource
MozillaThunderbird-debuginfo
MozillaThunderbird
MozillaThunderbird-translations-other
thunderbird (Debian package)
MozillaFirefox-branding-SLE
firefox
thunderbird
MozillaFirefox-branding-SLED
firefox (Ubuntu package)
Mozilla Thunderbird
IBM Cloud Pak for Multicloud Management Monitoring

Install updates from vendor's website.

Firefox ESR - addressed in versions 78.15.0, 91.2.0
Mozilla Firefox - update to 93.0
firefox-esr (Debian package) - addressed in versions 78.15.0esr-1~deb10u1, 78.15.0esr-1~deb11u1
Mozilla Thunderbird - addressed in versions 78.15.0, 91.2.0
IBM Cloud Pak for Multicloud Management Monitoring - update to 2.3 Fix Pack 6
thunderbird (Red Hat package) - addressed in versions 91.2.0-1.el7_9, 91.2.0-1.el8_1, 91.2.0-1.el8_2, 91.2.0-1.el8_4
MozillaFirefox - addressed in versions 91.2.0-3.155.2, 91.2.0-8.54.1, 91.2.0-78.143.1, 91.2.0-112.74.1
MozillaFirefox-translations-other - addressed in versions 91.2.0-3.155.2, 91.2.0-8.54.1, 91.2.0-78.143.1
MozillaFirefox-translations-common - addressed in versions 91.2.0-3.155.2, 91.2.0-8.54.1, 91.2.0-78.143.1, 91.2.0-112.74.1
MozillaFirefox-devel - addressed in versions 91.2.0-3.155.2, 91.2.0-8.54.1, 91.2.0-112.74.1
MozillaFirefox-debugsource - addressed in versions 91.2.0-3.155.2, 91.2.0-8.54.1, 91.2.0-112.74.1
MozillaFirefox-debuginfo - addressed in versions 91.2.0-3.155.2, 91.2.0-8.54.1, 91.2.0-78.143.1, 91.2.0-112.74.1
firefox (Red Hat package) - addressed in versions 91.2.0-4.el7_9, 91.2.0-4.el8_1, 91.2.0-4.el8_2, 91.2.0-4.el8_4
thunderbird (Ubuntu package) - addressed in versions 1:91.2.1+build1-0ubuntu0.21.10.1, 1:91.5.0+build1-0ubuntu0.18.04.1, 1:91.5.0+build1-0ubuntu0.20.04.1
MozillaThunderbird-translations-common - update to 91.4.0-8.45.2
MozillaThunderbird-debugsource - update to 91.4.0-8.45.2
MozillaThunderbird-debuginfo - 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
thunderbird (Debian package) - addressed in versions 1:91.4.1-1~deb10u1, 1:91.4.1-1~deb11u1
MozillaFirefox-branding-SLE - addressed in versions 91-4.19.1, 91-9.5.1
firefox - update to 91.6.0-1.0.1
thunderbird - update to 91.6.0-1.0.1
MozillaFirefox-branding-SLED - update to 91-21.18.1
firefox (Ubuntu package) - addressed in versions 93.0+build1-0ubuntu0.18.04.1, 93.0+build1-0ubuntu0.20.04.1, 93.0+build1-0ubuntu0.21.04.1

• https://www.mozilla.org/en-US/security/advisories/mfsa2021-43/
• https://www.mozilla.org/en-US/security/advisories/mfsa2021-44/
• https://www.mozilla.org/en-US/security/advisories/mfsa2021-45/

• Multiple vulnerabilities in Mozilla Firefox
• Debian update for firefox-esr
• Multiple vulnerabilities in Mozilla Thunderbird
• Red Hat Enterprise Linux 8 update for firefox
• Red Hat Enterprise Linux 8.2 update for firefox
• Red Hat Enterprise Linux 8.1 update for firefox
• Red Hat Enterprise Linux 7 update for firefox
• Red Hat Enterprise Linux 8 update for thunderbird
• Red Hat Enterprise Linux 8.2 update for thunderbird
• Red Hat Enterprise Linux 8.1 update for thunderbird
• Red Hat Enterprise Linux 7 update for thunderbird
• CentOS 7 update for thunderbird
• CentOS 7 update for firefox
• Debian update for thunderbird
• SUSE update for MozillaFirefox
• SUSE update for MozillaFirefox
• SUSE update for MozillaFirefox
• SUSE update for MozillaFirefox, rust-cbindgen
• Ubuntu update for firefox
• Ubuntu update for thunderbird
• Multiple vulnerabilities in IBM Cloud Pak for Multicloud Management Monitoring
• SUSE update for MozillaThunderbird
• Ubuntu update for thunderbird
• Anolis OS update for thunderbird (Anolis OS 8.5)
• Anolis OS update for firefox