CVE-2016-5271

Publication date 22 September 2016

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

The PropertyProvider::GetSpacingInternal function in Mozilla Firefox before 49.0 allows remote attackers to cause a denial of service (out-of-bounds read and application crash) via text runs in conjunction with a "display: contents" Cascading Style Sheets (CSS) property.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
firefox	16.10 yakkety	Fixed 49.0+build4-0ubuntu2
	16.04 LTS xenial	Fixed 49.0+build4-0ubuntu0.16.04.1
	14.04 LTS trusty	Fixed 49.0+build4-0ubuntu0.14.04.1
	12.04 LTS precise	Fixed 49.0+build4-0ubuntu0.12.04.1
thunderbird	16.10 yakkety	Not affected
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not in release
	12.04 LTS precise	Not affected

Severity score breakdown

Parameter	Value
Base score	6.5 · Medium
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	Required
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

USN-3076-1
Firefox vulnerabilities
22 September 2016