Resource management error in Firefox ESR and Mozilla Firefox - CVE-2020-15664

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Main Vulnerability Database Vulnerabilities #VU46016

Resource management error in Firefox ESR and Mozilla Firefox - CVE-2020-15664

Published: August 25, 2020 / Updated: August 26, 2020


Vulnerability identifier: #VU46016
CSH Severity: Medium
CVSS v4: 7.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-15664
CWE-ID: CWE-399
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to bypass certain security restrictions.

The vulnerability exists due to the way Firefox handles prompts. By holding a reference to the eval() function from an about:blank window, a malicious webpage could have gained access to the InstallTrigger object which would allow them to prompt the user to install an extension. Combined with user confusion, this could result in an unintended or malicious extension being installed.


Affected software

Firefox ESR
Mozilla Firefox
Gentoo Linux
Red Hat Enterprise Linux Desktop
CentOS
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux for Power, big endian
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for x86_64
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 Power, little endian - 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
Slackware Linux
Opensuse
Ubuntu
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 (Alpine package)
firefox-esr (Alpine package)
thunderbird (Debian package)
firefox-esr (Debian package)
thunderbird (Red Hat package)
firefox (Red Hat package)
firefox (Ubuntu package)
Firefox for Android
Mozilla Thunderbird

How to mitigate CVE-2020-15664

Install updates from vendor's website.

Firefox ESR - addressed in versions 68.12.0, 78.2.0
Mozilla Firefox - update to 80.0
thunderbird (Debian package) - update to 1:68.12.0-1~deb10u1
Firefox for Android - update to 80.1.2
Mozilla Thunderbird - addressed in versions 68.12.0, 78.2.0
firefox-esr (Debian package) - update to 68.12.0esr-1~deb10u1
thunderbird (Red Hat package) - addressed in versions 68.12.0-1.el6_10, 68.12.0-1.el7_8, 68.12.0-1.el8_0, 68.12.0-1.el8_1, 68.12.0-1.el8_2
firefox (Red Hat package) - addressed in versions 68.12.0-1.el6_10, 68.12.0-1.el7_8, 78.2.0-2.el8_2, 78.2.0-3.el8_0, 78.2.0-3.el8_1
firefox (Ubuntu package) - addressed in versions 80.0+build2-0ubuntu0.16.04.1, 80.0+build2-0ubuntu0.18.04.1, 80.0+build2-0ubuntu0.20.04.1, 80.0.1+build1-0ubuntu0.16.04.1, 80.0.1+build1-0ubuntu0.18.04.1, 80.0.1+build1-0ubuntu0.20.04.1

External References

Related Security Bulletins