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CVE-2017-7781

Published: 10 August 2017

An error occurs in the elliptic curve point addition algorithm that uses mixed Jacobian-affine coordinates where it can yield a result "POINT_AT_INFINITY" when it should not. A man-in-the-middle attacker could use this to interfere with a connection, resulting in an attacked party computing an incorrect shared secret. This vulnerability affects Firefox < 55.

Notes

AuthorNote
tyhicks
mozjs38 contains a copy of the SpiderMonkey JavaScript engine

Priority

Medium

Cvss 3 Severity Score

5.9

Score breakdown

Status

Package Release Status
firefox
Launchpad, Ubuntu, Debian
hirsute
Released (55.0.2+build1-0ubuntu4)
artful
Released (55.0.2+build1-0ubuntu4)
bionic
Released (55.0.2+build1-0ubuntu4)
cosmic
Released (55.0.2+build1-0ubuntu4)
disco
Released (55.0.2+build1-0ubuntu4)
eoan
Released (55.0.2+build1-0ubuntu4)
focal
Released (55.0.2+build1-0ubuntu4)
groovy
Released (55.0.2+build1-0ubuntu4)
impish
Released (55.0.2+build1-0ubuntu4)
jammy
Released (55.0.2+build1-0ubuntu4)
kinetic
Released (55.0.2+build1-0ubuntu4)
lunar
Released (55.0.2+build1-0ubuntu4)
trusty
Released (55.0.1+build2-0ubuntu0.14.04.2)
upstream
Released (55.0)
xenial
Released (55.0.1+build2-0ubuntu0.16.04.2)
zesty
Released (55.0.1+build2-0ubuntu0.17.04.2)
mantic
Released (55.0.2+build1-0ubuntu4)
mozjs38
Launchpad, Ubuntu, Debian
hirsute Does not exist

artful Ignored
(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

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
(end of life)
mantic Does not exist

Severity score breakdown

Parameter Value
Base score 5.9
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N