Use-after-free in Mozilla Firefox - CVE-2019-11692

Vulnerability identifier: #VU18557

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-2019-11692

CWE-ID: CWE-416

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 use-after-free error when listeners are removed from the event listener manager while still in use. A remote attacker can create a specially crafted web page, trick the victim into visiting it, trigger 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.

Mozilla Firefox
Firefox ESR
Arch Linux
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for Power
Slackware Linux
Opensuse
SUSE Package Hub for SUSE Linux Enterprise
thunderbird (Ubuntu package)
firefox (Ubuntu package)
firefox-esr (Debian package)
firefox-esr (Alpine package)
thunderbird (Debian package)
Mozilla Thunderbird

Install updates from vendor's website.

Mozilla Firefox - update to 67.0
thunderbird (Ubuntu package) - addressed in versions 1:60.7.0+build1-0ubuntu0.16.04.1, 1:60.7.0+build1-0ubuntu0.18.04.1, 1:60.7.0+build1-0ubuntu0.18.10.1, 1:60.7.0+build1-0ubuntu0.19.04.1
firefox (Ubuntu package) - addressed in versions 67.0+build2-0ubuntu0.16.04.1, 67.0+build2-0ubuntu0.18.04.1, 67.0+build2-0ubuntu0.18.10.1, 67.0+build2-0ubuntu0.19.04.1, 67.0.1+build1-0ubuntu0.16.04.1, 67.0.1+build1-0ubuntu0.18.04.1, 67.0.1+build1-0ubuntu0.18.10.1, 67.0.1+build1-0ubuntu0.19.04.1, 67.0.2+build2-0ubuntu0.16.04.1, 67.0.2+build2-0ubuntu0.18.04.1, 67.0.2+build2-0ubuntu0.18.10.1, 67.0.2+build2-0ubuntu0.19.04.1
firefox-esr (Debian package) - update to 60.7.0esr-1~deb9u1
Firefox ESR - update to 60.7.0
Mozilla Thunderbird - update to 60.7.0
firefox-esr (Alpine package) - update to 60.7.0-r0
thunderbird (Debian package) - update to 1:60.7.0-1~deb9u1

• https://www.mozilla.org/en-US/security/advisories/mfsa2019-13/

• Multiple vulnerabilities in Mozilla Firefox
• Multiple vulnerabilities in Firefox ESR
• Ubuntu update for Firefox
• Multiple vulnerabilities in Mozilla Thunderbird
• Slackware Linux update for mozilla-firefox
• Arch Linux update for thunderbird
• Arch Linux update for firefox
• Debian update for firefox-esr
• Ubuntu update for Thunderbird
• OpenSUSE Linux update for MozillaThunderbird
• USN-3991-2: Firefox regression
• OpenSUSE Linux update for MozillaFirefox
• Ubuntu regression update for Firefox (regression update)
• OpenSUSE Linux update for MozillaThunderbird
• Debian update for thunderbird
• Red Hat update for thunderbird
• Red Hat update for thunderbird
• Red Hat update for firefox
• Red Hat update for firefox
• Red Hat update for thunderbird
• Red Hat update for firefox
• Use-after-free in firefox-esr (Alpine package)