Use-after-free in Mozilla Firefox - CVE-2018-18500

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Main Vulnerability Database Vulnerabilities #VU17258

Use-after-free in Mozilla Firefox - CVE-2018-18500

Published: January 29, 2019


Vulnerability identifier: #VU17258
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-2018-18500
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 HTML5 stream in concert with custom HTML elements. 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.


Affected software

Mozilla Firefox
Firefox ESR
Gentoo Linux
Arch Linux
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux for Power
Slackware Linux
Opensuse
Fedora
SUSE Package Hub for SUSE Linux Enterprise
thunderbird (Ubuntu package)
firefox-esr (Alpine package)
firefox-esr (Debian package)
thunderbird (Debian package)
firefox
Mozilla Thunderbird
Dell EMC Unity VSA Operating Environment (OE)
Dell EMC Unity Operating Environment (OE)

How to mitigate CVE-2018-18500

Install updates from vendor's website.

Mozilla Firefox - update to 65.0
thunderbird (Ubuntu package) - addressed in versions 1:60.5.1+build2-0ubuntu0.14.04.1, 1:60.5.1+build2-0ubuntu0.16.04.1, 1:60.5.1+build2-0ubuntu0.18.04.1, 1:60.5.1+build2-0ubuntu0.18.10.1
Mozilla Thunderbird - update to 60.5
Firefox ESR - update to 60.5.0
firefox-esr (Alpine package) - update to 60.5.0-r0
firefox-esr (Debian package) - update to 60.5.0esr-1~deb9u1
thunderbird (Debian package) - update to 1:60.5.1-1~deb9u1
Dell EMC Unity VSA Operating Environment (OE) - update to 5.0.0.0.5.116
Dell EMC Unity Operating Environment (OE) - update to 5.0.0.0.5.116
firefox - addressed in versions 65.0-1.fc28, 65.0-1.fc29

External References

Related Security Bulletins