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CVE-2019-9812

Published: 4 September 2019

Given a compromised sandboxed content process due to a separate vulnerability, it is possible to escape that sandbox by loading accounts.firefox.com in that process and forcing a log-in to a malicious Firefox Sync account. Preference settings that disable the sandbox are then synchronized to the local machine and the compromised browser would restart without the sandbox if a crash is triggered. This vulnerability affects Firefox ESR < 60.9, Firefox ESR < 68.1, and Firefox < 69.

Notes

AuthorNote
tyhicks
mozjs contains a copy of the SpiderMonkey JavaScript engine

Priority

Medium

Cvss 3 Severity Score

9.3

Score breakdown

Status

Package Release Status
mozjs38
Launchpad, Ubuntu, Debian
bionic Needs triage

disco Does not exist

eoan Does not exist

focal Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist

impish Does not exist

groovy Does not exist

kinetic Does not exist

hirsute Does not exist

jammy Does not exist

lunar Does not exist

mantic Does not exist

mozjs52
Launchpad, Ubuntu, Debian
bionic Needs triage

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

trusty Does not exist

upstream Needs triage

xenial Does not exist

impish Does not exist

groovy Ignored
(end of life)
kinetic Does not exist

hirsute Does not exist

jammy Does not exist

lunar Does not exist

mantic Does not exist

firefox
Launchpad, Ubuntu, Debian
impish
Released (69.0+build2-0ubuntu1)
groovy
Released (69.0+build2-0ubuntu1)
kinetic
Released (69.0+build2-0ubuntu1)
bionic
Released (69.0+build2-0ubuntu0.18.04.1)
disco
Released (69.0+build2-0ubuntu0.19.04.1)
eoan
Released (69.0+build2-0ubuntu1)
focal
Released (69.0+build2-0ubuntu1)
hirsute
Released (69.0+build2-0ubuntu1)
jammy
Released (69.0+build2-0ubuntu1)
lunar
Released (69.0+build2-0ubuntu1)
trusty Does not exist

upstream
Released (69.0)
xenial
Released (69.0+build2-0ubuntu0.16.04.4)
mantic
Released (69.0+build2-0ubuntu1)
mozjs60
Launchpad, Ubuntu, Debian
impish Does not exist

groovy Does not exist

kinetic Does not exist

bionic Does not exist

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

hirsute Does not exist

jammy Does not exist

lunar Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist

mantic Does not exist

Severity score breakdown

Parameter Value
Base score 9.3
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Scope Changed
Confidentiality None
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:H