Use-after-free in Mozilla Firefox - CVE-2019-11752

Vulnerability identifier: #VU20823

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-2019-11752

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 extracting a key value in IndexedDB. A remote attacker can create specially crafted webpage, trick the victim into visiting it, trigger a user-after-free error by deleting the IndexedDB key value and subsequently make the application try to extract it during conversion.

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

Install updates from vendor's website.

Mozilla Firefox - update to 69.0
firefox (Ubuntu package) - addressed in versions 69.0+build2-0ubuntu0.16.04.4, 69.0+build2-0ubuntu0.18.04.1, 69.0+build2-0ubuntu0.19.04.1, 69.0.2+build1-0ubuntu0.16.04.1, 69.0.2+build1-0ubuntu0.18.04.1, 69.0.2+build1-0ubuntu0.19.04.1
thunderbird (Debian package) - addressed in versions 1:60.9.0-1~deb9u1, 1:60.9.0-1~deb10u1
thunderbird (Ubuntu package) - addressed in versions 1:60.9.0+build1-0ubuntu0.16.04.2, 1:60.9.0+build1-0ubuntu0.18.04.1, 1:60.9.0+build1-0ubuntu0.19.04.1
Mozilla Thunderbird - addressed in versions 60.9.0, 68.1.0
Firefox ESR - addressed in versions 60.9.0, 68.1.0
firefox-esr (Alpine package) - update to 60.9.0-r0
firefox-esr (Debian package) - update to 60.9.0esr-1~deb10u1

• https://www.mozilla.org/en-US/security/advisories/mfsa2019-25/

• Multiple vulnerabilities in Mozilla Firefox
• Multiple vulnerabilities in Mozilla Firefox ESR
• Multiple vulnerabilities in Mozilla Firefox ESR
• Arch Linux update for firefox
• Ubuntu update for Firefox
• Red Hat update for firefox
• Red Hat update for firefox
• Multiple vulnerabilities in Mozilla Thunderbird
• Debian update for thunderbird
• Red Hat update for thunderbird
• Red Hat update for thunderbird
• Red Hat update for thunderbird
• Red Hat update for firefox
• Debian update for firefox-esr
• Ubuntu update for Thunderbird
• Ubuntu regressions update for Firefox
• Gentoo update for Mozilla Firefox
• Use-after-free in firefox-esr (Alpine package)