VULNERABILITY INTELLIGENCE
CVE-2018-12393
CVSS score7.5 HIGH
EPSS probability3.92%
CISA KEVNot currently listed
Published2019-02-28
Last modified2026-06-17
CVSS vectorCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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.
Weakness classification
- CWE-190: Integer Overflow or Wraparound
- CWE-787: Out-of-bounds Write
Primary references
- security@mozilla.org — Third Party Advisory, VDB Entry
- security@mozilla.org — Third Party Advisory, VDB Entry
- security@mozilla.org — Third Party Advisory, VDB Entry
- security@mozilla.org — Third Party Advisory
- security@mozilla.org — Third Party Advisory
- security@mozilla.org — Third Party Advisory
- security@mozilla.org — Third Party Advisory
- security@mozilla.org — Issue Tracking, Permissions Required, Vendor Advisory
- security@mozilla.org — Third Party Advisory
- security@mozilla.org — Third Party Advisory
- security@mozilla.org — Third Party Advisory
- security@mozilla.org — Third Party Advisory