Type Confusion in Firefox ESR and Mozilla Firefox - CVE-2018-12386
Published: October 3, 2018 / Updated: April 12, 2020
Vulnerability identifier: #VU15149
CSH Severity: High
CVSS v4.0: 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/E:P/U:Amber
CVE-ID: CVE-2018-12386
CWE-ID: CWE-843
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vendor: Mozilla
Affected software:
Firefox ESR
Mozilla Firefox
Firefox ESR
Mozilla Firefox
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a type confusion error in register allocation within the JavaScript engine. A remote attacker can create a specially crafted web page, trick the victim into visiting it, trigger a type confusion error that will allow arbitrary read and write operations within the sandboxed content process.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
How to mitigate CVE-2018-12386
Install updates from vendor's website.