CVE-2018-12393
7.5
HIGH
CVSS 3.1
EPSS 3.0%
Description
A potential vulnerability was found in 32-bit builds where an integer overflow during the conversion of scripts to an internal UTF-16 representation could result in allocating a buffer too small for the conversion. This leads to a possible out-of-bounds write. *Note: 64-bit builds are not vulnerable to this issue.*. This vulnerability affects Firefox < 63, Firefox ESR < 60.3, and Thunderbird < 60.3.
How to fix CVE-2018-12393
To remediate CVE-2018-12393, upgrade the affected package to a fixed version below.
- —upgrade to 60.3.0esr-1 or later
- —upgrade to 1:60.3.0-1 or later
Is CVE-2018-12393 being exploited?
Low — EPSS is 3.0%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 60.3.0esr-1
- from 0, < 1:60.3.0-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |