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CVE-2017-7831

Published: 15 November 2017

A vulnerability where the security wrapper does not deny access to some exposed properties using the deprecated "_exposedProps_" mechanism on proxy objects. These properties should be explicitly unavailable to proxy objects. This vulnerability affects Firefox < 57.

Notes

AuthorNote
tyhicks
mozjs contains a copy of the SpiderMonkey JavaScript engine
chrisccoulson
This is not fixed in mozjs52, but it's unclear whether it is
unaffected or just ignored as https://bugzilla.mozilla.org/show_bug.cgi?id=1392026
is still private and I can't find a changeset referencing it)

Priority

Medium

Cvss 3 Severity Score

5.3

Score breakdown

Status

Package Release Status
firefox
Launchpad, Ubuntu, Debian
artful
Released (57.0+build4-0ubuntu0.17.10.5)
bionic
Released (57.0.1+build2-0ubuntu1)
cosmic
Released (57.0.1+build2-0ubuntu1)
disco
Released (57.0.1+build2-0ubuntu1)
eoan
Released (57.0.1+build2-0ubuntu1)
focal
Released (57.0.1+build2-0ubuntu1)
groovy
Released (57.0.1+build2-0ubuntu1)
hirsute
Released (57.0.1+build2-0ubuntu1)
impish
Released (57.0.1+build2-0ubuntu1)
jammy
Released (57.0.1+build2-0ubuntu1)
kinetic
Released (57.0.1+build2-0ubuntu1)
lunar
Released (57.0.1+build2-0ubuntu1)
trusty
Released (57.0+build4-0ubuntu0.14.04.4)
upstream
Released (57.0)
xenial
Released (57.0+build4-0ubuntu0.16.04.5)
zesty
Released (57.0+build4-0ubuntu0.17.04.5)
mozjs38
Launchpad, Ubuntu, Debian
artful Ignored
(reached end-of-life)
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

zesty Ignored
(reached end-of-life)
mozjs52
Launchpad, Ubuntu, Debian
artful Ignored
(reached end-of-life)
bionic Deferred

cosmic Ignored
(reached end-of-life)
disco Ignored
(reached end-of-life)
eoan Ignored
(reached end-of-life)
focal Deferred

groovy Ignored
(reached 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

zesty 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:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N