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CVE-2018-12393

Published: 24 October 2018

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.

Notes

AuthorNote
tyhicks
mozjs contains a copy of the SpiderMonkey JavaScript engine

Priority

Medium

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
mozjs60
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Ignored
(end of life)
disco Ignored
(end of life)
eoan Ignored
(end of life)
focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

kinetic Does not exist

lunar Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist

mantic Does not exist

firefox
Launchpad, Ubuntu, Debian
bionic
Released (63.0+build2-0ubuntu0.18.04.2)
cosmic
Released (63.0+build2-0ubuntu0.18.10.2)
disco
Released (63.0+build1-0ubuntu1)
eoan
Released (63.0+build1-0ubuntu1)
focal
Released (63.0+build1-0ubuntu1)
groovy
Released (63.0+build1-0ubuntu1)
hirsute
Released (63.0+build1-0ubuntu1)
impish
Released (63.0+build1-0ubuntu1)
jammy
Released (63.0+build1-0ubuntu1)
kinetic
Released (63.0+build1-0ubuntu1)
lunar
Released (63.0+build1-0ubuntu1)
trusty
Released (63.0+build2-0ubuntu0.14.04.2)
upstream
Released (63.0)
xenial
Released (63.0+build2-0ubuntu0.16.04.2)
mantic
Released (63.0+build1-0ubuntu1)
firefox-esr
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

disco Does not exist

eoan Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

kinetic Does not exist

lunar Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist

mantic Does not exist

mozjs38
Launchpad, Ubuntu, Debian
bionic Needs triage

cosmic Does not exist

disco Does not exist

eoan Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

kinetic Does not exist

lunar Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist

mantic Does not exist

mozjs52
Launchpad, Ubuntu, Debian
bionic Needs triage

cosmic Ignored
(end of life)
disco Ignored
(end of life)
eoan Ignored
(end of life)
focal Needs triage

groovy Ignored
(end of life)
hirsute Does not exist

impish Does not exist

jammy Does not exist

kinetic Does not exist

lunar Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist

mantic Does not exist

thunderbird
Launchpad, Ubuntu, Debian
bionic
Released (1:60.4.0+build2-0ubuntu0.18.04.1)
cosmic
Released (1:60.4.0+build2-0ubuntu0.18.10.1)
disco
Released (1:60.4.0+build2-0ubuntu1)
eoan
Released (1:60.4.0+build2-0ubuntu1)
focal
Released (1:60.4.0+build2-0ubuntu1)
groovy
Released (1:60.4.0+build2-0ubuntu1)
hirsute
Released (1:60.4.0+build2-0ubuntu1)
impish
Released (1:60.4.0+build2-0ubuntu1)
jammy
Released (1:60.4.0+build2-0ubuntu1)
kinetic
Released (1:60.4.0+build2-0ubuntu1)
lunar
Released (1:60.4.0+build2-0ubuntu1)
trusty
Released (1:60.4.0+build2-0ubuntu0.14.04.1)
upstream
Released (60.3)
xenial
Released (1:60.4.0+build2-0ubuntu0.16.04.1)
mantic
Released (1:60.4.0+build2-0ubuntu1)

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H