CVE-2018-12393 — Integer Overflow or Wraparound in Mozilla Firefox

CWE-190 — Integer Overflow or WraparoundCWE-787 — Out-of-bounds WriteCWE-120 — Classic Buffer Overflow8 documents6 sources
Severity
7.5HIGHNVD
OSV8.8
EPSS
5.8%
top 9.50%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
11
Mozilla FirefoxMozilla Firefox ESRMozilla Thunderbird+8 more
Timeline
Latest updateJan 24
PublishedFeb 28

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.

CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6

Affected Packages10 packages

▶CVEListV5mozilla/firefoxunspecified — 63
▶NVDmozilla/firefox< 63.0
▶CVEListV5mozilla/firefox_esrunspecified — 60.3
▶Ubuntumozilla/firefox< 63.0+build2-0ubuntu0.14.04.2+2

Also affects: Debian Linux 8.0, 9.0, Ubuntu Linux 14.04, 16.04, 18.04, 18.10, Enterprise Linux 7.6

🔴Vulnerability Details

2
OSV
firefox regressions↗2018-11-23
▶
OSV
firefox vulnerabilities↗2018-10-24
▶

📋Vendor Advisories

4
Ubuntu
Thunderbird vulnerabilities↗2019-01-24
▶
Ubuntu
Firefox vulnerabilities↗2018-10-24
▶
Red Hat
Mozilla: Integer overflow during Unicode conversion while loading JavaScript↗2018-10-23
▶
Debian
CVE-2018-12393: firefox - A potential vulnerability was found in 32-bit builds where an integer overflow d...↗2018
▶

💬Community

1
Bugzilla
CVE-2018-12393 Mozilla: Integer overflow during Unicode conversion while loading JavaScript↗2018-10-23
▶
CVE-2018-12393 — Integer Overflow or Wraparound | cvebase