CVE Vulnerabilities

CVE-2021-23995

Operation on a Resource after Expiration or Release

Published: Jun 24, 2021 | Modified: Jul 02, 2021
CVSS 3.x
8.8
HIGH
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 2.x
5.1 MEDIUM
AV:N/AC:H/Au:N/C:P/I:P/A:P
RedHat/V2
RedHat/V3
8.8 IMPORTANT
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Ubuntu
MEDIUM

When Responsive Design Mode was enabled, it used references to objects that were previously freed. We presume that with enough effort this could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88.

Weakness

The product uses, accesses, or otherwise operates on a resource after that resource has been expired, released, or revoked.

Affected Software

Name Vendor Start Version End Version
Firefox Mozilla * 88.0 (excluding)
Firefox_esr Mozilla * 78.10 (excluding)
Thunderbird Mozilla * 78.10 (excluding)
Red Hat Enterprise Linux 7 RedHat thunderbird-0:78.10.0-1.el7_9 *
Red Hat Enterprise Linux 7 RedHat firefox-0:78.10.0-1.el7_9 *
Red Hat Enterprise Linux 8 RedHat thunderbird-0:78.10.0-1.el8_3 *
Red Hat Enterprise Linux 8 RedHat firefox-0:78.10.0-1.el8_3 *
Red Hat Enterprise Linux 8.1 Extended Update Support RedHat thunderbird-0:78.10.0-1.el8_1 *
Red Hat Enterprise Linux 8.1 Extended Update Support RedHat firefox-0:78.10.0-1.el8_1 *
Red Hat Enterprise Linux 8.2 Extended Update Support RedHat thunderbird-0:78.10.0-1.el8_2 *
Red Hat Enterprise Linux 8.2 Extended Update Support RedHat firefox-0:78.10.0-1.el8_2 *
Firefox Ubuntu bionic *
Firefox Ubuntu devel *
Firefox Ubuntu focal *
Firefox Ubuntu groovy *
Firefox Ubuntu hirsute *
Firefox Ubuntu impish *
Firefox Ubuntu jammy *
Firefox Ubuntu kinetic *
Firefox Ubuntu lunar *
Firefox Ubuntu mantic *
Firefox Ubuntu noble *
Firefox Ubuntu trusty *
Firefox Ubuntu upstream *
Firefox Ubuntu xenial *
Firefox-esr Ubuntu trusty *
Mozjs38 Ubuntu bionic *
Mozjs52 Ubuntu bionic *
Mozjs52 Ubuntu groovy *
Mozjs68 Ubuntu groovy *
Mozjs78 Ubuntu groovy *
Mozjs78 Ubuntu hirsute *
Mozjs78 Ubuntu impish *
Mozjs78 Ubuntu kinetic *
Mozjs78 Ubuntu lunar *
Thunderbird Ubuntu bionic *
Thunderbird Ubuntu devel *
Thunderbird Ubuntu focal *
Thunderbird Ubuntu groovy *
Thunderbird Ubuntu hirsute *
Thunderbird Ubuntu impish *
Thunderbird Ubuntu jammy *
Thunderbird Ubuntu kinetic *
Thunderbird Ubuntu lunar *
Thunderbird Ubuntu mantic *
Thunderbird Ubuntu noble *
Thunderbird Ubuntu trusty *
Thunderbird Ubuntu upstream *
Thunderbird Ubuntu xenial *

References