Integer overflow in Mozilla Firefox - CVE-2018-12393

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Main Vulnerability Database Vulnerabilities #VU15491

Integer overflow in Mozilla Firefox - CVE-2018-12393

Published: October 24, 2018


Vulnerability identifier: #VU15491
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-2018-12393
CWE-ID: CWE-190
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The weakness exists due to integer overflow during the conversion of scripts to an internal UTF-16 representation. A remote attacker can trick the victim into visiting a specially crafted website, trigger out-of-bounds write and execute arbitrary code with elevated privileges.

Successful exploitation of the vulnerability may result in system compromise.

Affected software

Mozilla Firefox
Firefox ESR
Debian Linux
Gentoo Linux
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux for Power
Opensuse
Mozilla Thunderbird

How to mitigate CVE-2018-12393

Update to version 63.0.

Mozilla Firefox - update to 63.0
Mozilla Thunderbird - update to 60.3
Firefox ESR - update to 60.3.0

External References

Related Security Bulletins