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CVE Vulnerabilities

CVE-2021-23995

Operation on a Resource after Expiration or Release

Published: Jun 24, 2021 | Modified: Nov 21, 2024
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
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2021-23995
CWEhttps://cwe.mitre.org/data/definitions/672.html

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

NameVendorStart VersionEnd Version
FirefoxMozilla*88.0 (excluding)
Firefox_esrMozilla*78.10 (excluding)
ThunderbirdMozilla*78.10 (excluding)
Red Hat Enterprise Linux 7RedHatthunderbird-0:78.10.0-1.el7_9*
Red Hat Enterprise Linux 7RedHatfirefox-0:78.10.0-1.el7_9*
Red Hat Enterprise Linux 8RedHatthunderbird-0:78.10.0-1.el8_3*
Red Hat Enterprise Linux 8RedHatfirefox-0:78.10.0-1.el8_3*
Red Hat Enterprise Linux 8.1 Extended Update SupportRedHatthunderbird-0:78.10.0-1.el8_1*
Red Hat Enterprise Linux 8.1 Extended Update SupportRedHatfirefox-0:78.10.0-1.el8_1*
Red Hat Enterprise Linux 8.2 Extended Update SupportRedHatthunderbird-0:78.10.0-1.el8_2*
Red Hat Enterprise Linux 8.2 Extended Update SupportRedHatfirefox-0:78.10.0-1.el8_2*
FirefoxUbuntubionic*
FirefoxUbuntudevel*
FirefoxUbuntufocal*
FirefoxUbuntugroovy*
FirefoxUbuntuhirsute*
FirefoxUbuntuimpish*
FirefoxUbuntujammy*
FirefoxUbuntukinetic*
FirefoxUbuntulunar*
FirefoxUbuntumantic*
FirefoxUbuntunoble*
FirefoxUbuntutrusty*
FirefoxUbuntuupstream*
FirefoxUbuntuxenial*
Firefox-esrUbuntutrusty*
Mozjs38Ubuntubionic*
Mozjs38Ubuntuesm-apps/bionic*
Mozjs38Ubuntuupstream*
Mozjs52Ubuntubionic*
Mozjs52Ubuntuesm-apps/focal*
Mozjs52Ubuntuesm-infra/bionic*
Mozjs52Ubuntufocal*
Mozjs52Ubuntugroovy*
Mozjs52Ubuntuupstream*
Mozjs68Ubuntuesm-infra/focal*
Mozjs68Ubuntufocal*
Mozjs68Ubuntugroovy*
Mozjs68Ubuntuupstream*
Mozjs78Ubuntuesm-apps/jammy*
Mozjs78Ubuntugroovy*
Mozjs78Ubuntuhirsute*
Mozjs78Ubuntuimpish*
Mozjs78Ubuntujammy*
Mozjs78Ubuntukinetic*
Mozjs78Ubuntulunar*
Mozjs78Ubuntuupstream*
ThunderbirdUbuntubionic*
ThunderbirdUbuntudevel*
ThunderbirdUbuntufocal*
ThunderbirdUbuntugroovy*
ThunderbirdUbuntuhirsute*
ThunderbirdUbuntuimpish*
ThunderbirdUbuntujammy*
ThunderbirdUbuntukinetic*
ThunderbirdUbuntulunar*
ThunderbirdUbuntumantic*
ThunderbirdUbuntunoble*
ThunderbirdUbuntutrusty*
ThunderbirdUbuntuupstream*
ThunderbirdUbuntuxenial*

References

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