Use-after-free in Firefox ESR - CVE-2020-15669

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Main Vulnerability Database Vulnerabilities #VU46018

Use-after-free in Firefox ESR - CVE-2020-15669

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


Vulnerability identifier: #VU46018
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-2020-15669
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 aborting operations in browser. 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 system.

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


Affected software

Firefox ESR
Gentoo Linux
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux for Power, big endian
CentOS
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Desktop
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 Power, little endian - Extended Update Support
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux Server - AUS
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
thunderbird (Debian package)
firefox-esr (Debian package)
thunderbird (Red Hat package)
firefox (Red Hat package)
Mozilla Thunderbird

How to mitigate CVE-2020-15669

Install updates from vendor's website.

Firefox ESR - update to 68.12.0
thunderbird (Debian package) - update to 1:68.12.0-1~deb10u1
Mozilla Thunderbird - update to 68.12.0
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

External References

Related Security Bulletins