CVE-2017-7813

Inside the JavaScript parser, a cast of an integer to a narrower type can result in data read from outside the buffer being parsed. This usually results in a non-exploitable crash, but can leak a limited amount of information from memory if it matches JavaScript identifier syntax. This vulnerability affects Firefox < 56.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
firefox	24.04 LTS noble	Fixed 56.0+build6-0ubuntu1
	23.10 mantic	Fixed 56.0+build6-0ubuntu1
	23.04 lunar	Fixed 56.0+build6-0ubuntu1
	22.10 kinetic	Fixed 56.0+build6-0ubuntu1
	22.04 LTS jammy	Fixed 56.0+build6-0ubuntu1
	21.10 impish	Fixed 56.0+build6-0ubuntu1
	21.04 hirsute	Fixed 56.0+build6-0ubuntu1
	20.10 groovy	Fixed 56.0+build6-0ubuntu1
	20.04 LTS focal	Fixed 56.0+build6-0ubuntu1
	19.10 eoan	Fixed 56.0+build6-0ubuntu1
	19.04 disco	Fixed 56.0+build6-0ubuntu1
	18.10 cosmic	Fixed 56.0+build6-0ubuntu1
	18.04 LTS bionic	Fixed 56.0+build6-0ubuntu1
	17.10 artful	Fixed 56.0+build6-0ubuntu1
	17.04 zesty	Fixed 56.0+build6-0ubuntu0.17.04.1
	16.04 LTS xenial	Fixed 56.0+build6-0ubuntu0.16.04.1
	14.04 LTS trusty	Fixed 56.0+build6-0ubuntu0.14.04.1
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
mozjs52	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 affected
	20.04 LTS focal	Not affected
	19.10 eoan	Not affected
	19.04 disco	Not affected
	18.10 cosmic	Not affected
	18.04 LTS bionic	Not affected
	17.10 artful	Not affected
	17.04 zesty	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release

Notes

tyhicks

mozjs contains a copy of the SpiderMonkey JavaScript engine

Severity score breakdown

Parameter	Value
Base score	8.2 · High
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	Low
Integrity impact	None
Availability impact	High
Vector	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H

References

Related Ubuntu Security Notices (USN)

USN-3435-1
Firefox vulnerabilities
2 October 2017