Use-after-free in Firefox ESR and Mozilla Firefox - CVE-2020-6805

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Main Vulnerability Database Vulnerabilities #VU25849

Use-after-free in Firefox ESR and Mozilla Firefox - CVE-2020-6805

Published: March 10, 2020 / Updated: March 10, 2020


Vulnerability identifier: #VU25849
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-2020-6805
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 when removing data about origins in Quota manager in Mozilla Firefox. A remote attacker can create a specially crafted web page, trick the victim into visiting it, trigger a use-after-free error and execute arbitrary code on the target system.

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


Affected software

Firefox ESR
Mozilla Firefox
Arch Linux
Gentoo Linux
CentOS
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux for Power, big endian
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux for Power, big endian - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Oracle Solaris
Slackware Linux
Opensuse
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 (Ubuntu package)
thunderbird (Debian package)
firefox-esr (Debian package)
thunderbird (Ubuntu package)
thunderbird (Red Hat package)
firefox-esr (Alpine package)
mozjs68 (Alpine package)
thunderbird (Alpine package)
firefox (Alpine package)
Mozilla Thunderbird
Cloud App Management V2018

How to mitigate CVE-2020-6805

Install updates from vendor's website.

Firefox ESR - update to 68.6.0
Mozilla Firefox - update to 74.0
firefox (Ubuntu package) - addressed in versions 74.0+build3-0ubuntu0.16.04.1, 74.0+build3-0ubuntu0.18.04.1, 74.0+build3-0ubuntu0.19.10.1
thunderbird (Debian package) - addressed in versions 1:68.6.0-1~deb9u1, 1:68.6.0-1~deb10u1
Mozilla Thunderbird - update to 68.6.0
firefox-esr (Debian package) - addressed in versions 68.6.0esr-1~deb9u1, 68.6.0esr-1~deb10u1
thunderbird (Ubuntu package) - update to 1:68.7.0+build1-0ubuntu0.16.04.2
thunderbird (Red Hat package) - addressed in versions 68.6.0-1.el6_10, 68.6.0-1.el7_7, 68.6.0-1.el8_0, 68.6.0-1.el8_1
firefox-esr (Alpine package) - update to 68.6.0-r0
mozjs68 (Alpine package) - update to 68.6.0-r0
thunderbird (Alpine package) - update to 68.7.0-r0
firefox (Alpine package) - update to 74.0-r0
Cloud App Management V2018 - update to 2020.1.0

External References

Related Security Bulletins