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CVE-2017-5448

Published: 20 April 2017

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.

Priority

Medium

Cvss 3 Severity Score

8.6

Score breakdown

Status

Package Release Status
firefox
Launchpad, Ubuntu, Debian
precise Ignored

trusty
Released (53.0+build6-0ubuntu0.14.04.1)
upstream
Released (53.0)
xenial
Released (53.0+build6-0ubuntu0.16.04.1)
yakkety
Released (53.0+build6-0ubuntu0.16.10.1)
zesty
Released (53.0+build6-0ubuntu0.17.04.1)
thunderbird
Launchpad, Ubuntu, Debian
precise Ignored
(end of life)
trusty Does not exist
(trusty was not-affected)
upstream Not vulnerable

xenial Not vulnerable

yakkety Not vulnerable

zesty Not vulnerable

Severity score breakdown

Parameter Value
Base score 8.6
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