CVE-2018-18493

Published: 11 December 2018

A buffer overflow can occur in the Skia library during buffer offset calculations with hardware accelerated canvas 2D actions due to the use of 32-bit calculations instead of 64-bit. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 60.4, Firefox ESR < 60.4, and Firefox < 64.

Priority

Cvss 3 Severity Score

9.8

Score breakdown

Status

Package	Release	Status
firefox Launchpad, Ubuntu, Debian	bionic	Released (64.0+build3-0ubuntu0.18.04.1)
	cosmic	Released (64.0+build3-0ubuntu0.18.10.1)
	trusty	Released (64.0+build3-0ubuntu0.14.04.1)
	upstream	Released (64.0)
	xenial	Released (64.0+build3-0ubuntu0.16.04.1)
thunderbird Launchpad, Ubuntu, Debian	bionic	Released (1:60.4.0+build2-0ubuntu0.18.04.1)
	cosmic	Released (1:60.4.0+build2-0ubuntu0.18.10.1)
	trusty	Released (1:60.4.0+build2-0ubuntu0.14.04.1)
	upstream	Released (60.4)
	xenial	Released (1:60.4.0+build2-0ubuntu0.16.04.1)

Severity score breakdown

Parameter	Value
Base score	9.8
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Join the discussion

Canonical is offering Expanded Security Maintenance

Canonical is offering Ubuntu Expanded Security Maintenance (ESM) for security fixes and essential packages.

Find out more about ESM ›