CVE-2017-7781

Publication date 10 August 2017

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

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.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
firefox	24.04 LTS noble	Fixed 55.0.2+build1-0ubuntu4
	23.10 mantic	Fixed 55.0.2+build1-0ubuntu4
	23.04 lunar	Fixed 55.0.2+build1-0ubuntu4
	22.10 kinetic	Fixed 55.0.2+build1-0ubuntu4
	22.04 LTS jammy	Fixed 55.0.2+build1-0ubuntu4
	21.10 impish	Fixed 55.0.2+build1-0ubuntu4
	21.04 hirsute	Fixed 55.0.2+build1-0ubuntu4
	20.10 groovy	Fixed 55.0.2+build1-0ubuntu4
	20.04 LTS focal	Fixed 55.0.2+build1-0ubuntu4
	19.10 eoan	Fixed 55.0.2+build1-0ubuntu4
	19.04 disco	Fixed 55.0.2+build1-0ubuntu4
	18.10 cosmic	Fixed 55.0.2+build1-0ubuntu4
	18.04 LTS bionic	Fixed 55.0.2+build1-0ubuntu4
	17.10 artful	Fixed 55.0.2+build1-0ubuntu4
	17.04 zesty	Fixed 55.0.1+build2-0ubuntu0.17.04.2
	16.04 LTS xenial	Fixed 55.0.1+build2-0ubuntu0.16.04.2
	14.04 LTS trusty	Fixed 55.0.1+build2-0ubuntu0.14.04.2
mozjs38	24.04 LTS noble	Not in release
	23.10 mantic	Not in release
	23.04 lunar	Not in release
	22.10 kinetic	Not in release
	22.04 LTS jammy	Not in release
	21.10 impish	Not in release
	21.04 hirsute	Not in release
	20.10 groovy	Not in release
	20.04 LTS focal	Not in release
	19.10 eoan	Not in release
	19.04 disco	Not in release
	18.10 cosmic	Not in release
	18.04 LTS bionic	Ignored
	17.10 artful	Ignored end of life
	17.04 zesty	Ignored end of life
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release

Notes

tyhicks

mozjs38 contains a copy of the SpiderMonkey JavaScript engine

Severity score breakdown

Parameter	Value
Base score	5.9 · Medium
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