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CVE-2020-15669

Published: 1 October 2020

When aborting an operation, such as a fetch, an abort signal may be deleted while alerting the objects to be notified. This results in a use-after-free and we presume that with enough effort it could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 68.12 and Thunderbird < 68.12.

Priority

Medium

Cvss 3 Severity Score

8.8

Score breakdown

Status

Package Release Status
thunderbird
Launchpad, Ubuntu, Debian
trusty Does not exist

hirsute Not vulnerable
(1:78.4.3+build1-0ubuntu1)
bionic
Released (1:78.8.1+build1-0ubuntu0.18.04.1)
focal
Released (78.7.1+build1-0ubuntu0.20.04.1)
groovy Not vulnerable
(1:78.3.2+build1-0ubuntu1)
impish Not vulnerable
(1:78.4.3+build1-0ubuntu1)
jammy Not vulnerable
(1:78.4.3+build1-0ubuntu1)
kinetic Not vulnerable
(1:78.4.3+build1-0ubuntu1)
lunar Not vulnerable
(1:78.4.3+build1-0ubuntu1)
upstream
Released (68.12)
xenial Ignored
(end of standard support, was needed)
firefox-esr
Launchpad, Ubuntu, Debian
impish Does not exist

trusty Does not exist

upstream
Released (68.12.0esr-1)
xenial Does not exist

bionic Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

jammy Does not exist

kinetic Does not exist

lunar Does not exist

Severity score breakdown

Parameter Value
Base score 8.8
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H