CVE-2017-5448

Publication date 20 April 2017

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

An out-of-bounds write in "ClearKeyDecryptor" while decrypting some Clearkey-encrypted media content. The "ClearKeyDecryptor" code runs within the Gecko Media Plugin (GMP) sandbox. If a second mechanism is found to escape the sandbox, this vulnerability allows for the writing of arbitrary data within memory, resulting in a potentially exploitable crash. This vulnerability affects Firefox ESR < 45.9, Firefox ESR < 52.1, and Firefox < 53.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
firefox	17.04 zesty	Fixed 53.0+build6-0ubuntu0.17.04.1
	16.10 yakkety	Fixed 53.0+build6-0ubuntu0.16.10.1
	16.04 LTS xenial	Fixed 53.0+build6-0ubuntu0.16.04.1
	14.04 LTS trusty	Fixed 53.0+build6-0ubuntu0.14.04.1
	12.04 LTS precise	Ignored
thunderbird	17.04 zesty	Not affected
	16.10 yakkety	Not affected
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not in release
	12.04 LTS precise	Ignored end of life

Severity score breakdown

Parameter	Value
Base score	8.6 · High
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	Low
Integrity impact	Low
Availability impact	High
Vector	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

References

Related Ubuntu Security Notices (USN)

USN-3260-1
Firefox vulnerabilities
21 April 2017