What’s Vulnerable › Vulnerabilities

CVE-2018-12392

• Severity: critical (CVSS 9.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-02-28 · updated 2026-06-17

Description

When manipulating user events in nested loops while opening a document through script, it is possible to trigger a potentially exploitable crash due to poor event handling. This vulnerability affects Firefox < 63, Firefox ESR < 60.3, and Thunderbird < 60.3.

Affected products

• Canonical Ubuntu Linux: 14.04, 16.04, 18.04, 18.10
• Debian Linux: 8.0, 9.0
• Mozilla Firefox: before 60.3.0; before 63.0 — fixed in 60.3.0, 63.0
• Mozilla Thunderbird: before 60.3.0 — fixed in 60.3.0
• RedHat Enterprise Linux Desktop: 6.0, 7.0
• RedHat Enterprise Linux Server: 6.0, 7.0
• RedHat Enterprise Linux Server Aus: 7.6
• RedHat Enterprise Linux Server Eus: 7.5, 7.6
• RedHat Enterprise Linux Server Tus: 7.6
• RedHat Enterprise Linux Workstation: 6.0, 7.0

How to fix

Upgrade to a fixed version: Mozilla Firefox 60.3.0, 63.0; Mozilla Thunderbird 60.3.0. Check the vendor advisory for mitigations.

References

• http://www.securityfocus.com/bid/105718
• http://www.securityfocus.com/bid/105769
• http://www.securitytracker.com/id/1041944
• https://access.redhat.com/errata/RHSA-2018:3005
• https://access.redhat.com/errata/RHSA-2018:3006
• https://access.redhat.com/errata/RHSA-2018:3531
• https://access.redhat.com/errata/RHSA-2018:3532
• https://bugzilla.mozilla.org/show_bug.cgi?id=1492823
• https://lists.debian.org/debian-lts-announce/2018/11/msg00008.html
• https://lists.debian.org/debian-lts-announce/2018/11/msg00011.html
• https://security.gentoo.org/glsa/201811-04
• https://security.gentoo.org/glsa/201811-13

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