Use-after-free in Mozilla Firefox - CVE-2019-11757

Vulnerability identifier: #VU22163

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-2019-11757

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 storing a value in IndexedDB. 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.

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

Install updates from vendor's website.

Mozilla Firefox - update to 70.0
firefox (Ubuntu package) - addressed in versions 70.0+build2-0ubuntu0.16.04.1, 70.0+build2-0ubuntu0.18.04.1, 70.0+build2-0ubuntu0.19.04.1, 70.0+build2-0ubuntu0.19.10.1
thunderbird (Ubuntu package) - addressed in versions 1:68.2.1+build1-0ubuntu0.18.04.1, 1:68.2.1+build1-0ubuntu0.19.10.1, 1:68.2.2+build1-0ubuntu0.18.04.1, 1:68.2.2+build1-0ubuntu0.19.10.1, 1:68.7.0+build1-0ubuntu0.16.04.2
thunderbird (Debian package) - addressed in versions 1:68.2.2-1~deb9u1, 1:68.2.2-1~deb10u1
Mozilla Thunderbird - update to 68.2.0
Firefox ESR - update to 68.2.0
firefox-esr (Debian package) - update to 68.2.0esr-1~deb10u1
firefox-esr (Alpine package) - update to 68.2.0-r0

• https://www.mozilla.org/en-US/security/advisories/mfsa2019-34/

• Multiple vulnerabilities in Mozilla Firefox
• Multiple vulnerabilities in Firefox ESR
• Slackware Linux update for mozilla-firefox
• Multiple vulnerabilities in Mozilla Thunderbird
• Ubuntu update for Firefox
• Red Hat update for firefox
• Debian update for firefox-esr
• Arch Linux update for firefox
• Arch Linux update for thunderbird
• Red Hat update for firefox
• Red Hat update for thunderbird
• Red Hat update for thunderbird
• Red Hat update for firefox
• Red Hat update for thunderbird
• OpenSUSE update for Mozilla Thunderbird
• OpenSUSE update for Mozilla Thunderbird
• OpenSUSE Linux update for MozillaFirefox, MozillaFirefox-branding-SLE
• OpenSUSE Linux update for MozillaFirefox, MozillaFirefox-branding-SLE
• Debian update for thunderbird
• Ubuntu update for Thunderbird
• Ubuntu update for Thunderbird
• Gentoo update for Mozilla Thunderbird
• Ubuntu update for Thunderbird
• Use-after-free in firefox (Alpine package)
• Use-after-free in firefox-esr (Alpine package)