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CVE-2017-5386

Published: 25 January 2017

WebExtension scripts can use the "data:" protocol to affect pages loaded by other web extensions using this protocol, leading to potential data disclosure or privilege escalation in affected extensions. This vulnerability affects Firefox ESR < 45.7 and Firefox < 51.

Priority

Medium

Cvss 3 Severity Score

7.3

Score breakdown

Status

Package Release Status
firefox
Launchpad, Ubuntu, Debian
precise
Released (51.0.1+build2-0ubuntu0.12.04.1)
trusty
Released (51.0.1+build2-0ubuntu0.14.04.1)
upstream
Released (51)
xenial
Released (51.0.1+build2-0ubuntu0.16.04.1)
yakkety
Released (51.0.1+build2-0ubuntu0.16.10.1)
zesty
Released (52.0.1+build2-0ubuntu1)
thunderbird
Launchpad, Ubuntu, Debian
precise Not vulnerable

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 7.3
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality Low
Integrity impact Low
Availability impact Low
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L