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CVE-2018-12379

Published: 18 October 2018

When the Mozilla Updater opens a MAR format file which contains a very long item filename, an out-of-bounds write can be triggered, leading to a potentially exploitable crash. This requires running the Mozilla Updater manually on the local system with the malicious MAR file in order to occur. This vulnerability affects Firefox < 62, Firefox ESR < 60.2, and Thunderbird < 60.2.1.

Notes

AuthorNote
chrisccoulson
Affects the upstream updater

Priority

Medium

Cvss 3 Severity Score

7.8

Score breakdown

Status

Package Release Status
firefox
Launchpad, Ubuntu, Debian
bionic Not vulnerable

trusty Does not exist
(trusty was not-affected)
upstream
Released (62.0)
xenial Not vulnerable

firefox-esr
Launchpad, Ubuntu, Debian
bionic Does not exist

trusty Does not exist

upstream
Released (60.2.0esr-1)
xenial Does not exist

thunderbird
Launchpad, Ubuntu, Debian
bionic Not vulnerable

trusty Does not exist
(trusty was not-affected)
upstream
Released (60.2.1)
xenial Not vulnerable

Severity score breakdown

Parameter Value
Base score 7.8
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H