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CVE-2020-15680

Published: 22 October 2020

If a valid external protocol handler was referenced in an image tag, the resulting broken image size could be distinguished from a broken image size of a non-existent protocol handler. This allowed an attacker to successfully probe whether an external protocol handler was registered. This vulnerability affects Firefox < 82.

Notes

AuthorNote
tyhicks
mozjs contains a copy of the SpiderMonkey JavaScript engine

Priority

Medium

Cvss 3 Severity Score

5.3

Score breakdown

Status

Package Release Status
mozjs52
Launchpad, Ubuntu, Debian
groovy Ignored
(end of life)
bionic Needs triage

focal Needs triage

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

mozjs68
Launchpad, Ubuntu, Debian
groovy Ignored
(end of life)
bionic Does not exist

focal Needs triage

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 (82.0+build2-0ubuntu0.18.04.1)
focal
Released (82.0+build2-0ubuntu0.20.04.1)
trusty Does not exist

groovy
Released (82.0+build2-0ubuntu0.20.10.1)
xenial
Released (82.0+build2-0ubuntu0.16.04.5)
hirsute
Released (82.0.2+build1-0ubuntu1)
impish
Released (82.0.2+build1-0ubuntu1)
jammy
Released (82.0.2+build1-0ubuntu1)
kinetic
Released (82.0.2+build1-0ubuntu1)
lunar
Released (82.0.2+build1-0ubuntu1)
upstream
Released (82)
mantic
Released (82.0.2+build1-0ubuntu1)
mozjs38
Launchpad, Ubuntu, Debian
trusty Does not exist

upstream Needs triage

xenial Does not exist

bionic Needs triage

hirsute Does not exist

focal Does not exist

groovy Does not exist

impish Does not exist

jammy Does not exist

kinetic Does not exist

lunar Does not exist

mantic Does not exist

mozjs60
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Does not exist

hirsute Does not exist

groovy 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

Severity score breakdown

Parameter Value
Base score 5.3
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality Low
Integrity impact None
Availability impact None
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N