Vulnerability Details : CVE-2021-43546

It was possible to recreate previous cursor spoofing attacks against users with a zoomed native cursor. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.

Published 2021-12-08 22:15:10

Updated 2022-12-09 19:28:51

Source Mozilla Corporation

View at NVD, CVE.org

Exploit prediction scoring system (EPSS) score for CVE-2021-43546

Probability of exploitation activity in the next 30 days: 0.12%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 45 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2021-43546

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Source
4.3	MEDIUM	AV:N/AC:M/Au:N/C:N/I:P/A:N	8.6	2.9	nvd@nist.gov
Access Vector: Network Access Complexity: Medium Authentication: None Confidentiality Impact: None Integrity Impact: Partial Availability Impact: None
4.3	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N	2.8	1.4	nvd@nist.gov
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: Required Scope: Unchanged Confidentiality: None Integrity: Low Availability: None

CWE ids for CVE-2021-43546

CWE-1021 Improper Restriction of Rendered UI Layers or Frames

The web application does not restrict or incorrectly restricts frame objects or UI layers that belong to another application or domain, which can lead to user confusion about which interface the user is interacting with.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2021-43546

https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html

[SECURITY] [DLA 2874-1] thunderbird security update
Mailing List;Third Party Advisory

CVEs referencing this url
https://lists.debian.org/debian-lts-announce/2021/12/msg00030.html

[SECURITY] [DLA 2863-1] firefox-esr security update
Mailing List;Third Party Advisory

CVEs referencing this url
https://www.mozilla.org/security/advisories/mfsa2021-53/

Security Vulnerabilities fixed in Firefox ESR 91.4.0 — Mozilla
Vendor Advisory

CVEs referencing this url
https://www.debian.org/security/2021/dsa-5026

Debian -- Security Information -- DSA-5026-1 firefox-esr
Third Party Advisory

CVEs referencing this url
https://security.gentoo.org/glsa/202202-03

Mozilla Firefox: Multiple vulnerabilities (GLSA 202202-03) — Gentoo security
Third Party Advisory

CVEs referencing this url
https://bugzilla.mozilla.org/show_bug.cgi?id=1737751

Access Denied
Issue Tracking;Vendor Advisory
https://www.debian.org/security/2022/dsa-5034

Debian -- Security Information -- DSA-5034-1 thunderbird
Third Party Advisory

CVEs referencing this url
https://security.gentoo.org/glsa/202208-14

Mozilla Thunderbird: Multiple Vulnerabilities (GLSA 202208-14) — Gentoo security
Third Party Advisory

CVEs referencing this url
https://www.mozilla.org/security/advisories/mfsa2021-54/

Security Vulnerabilities fixed in Thunderbird 91.4.0 — Mozilla
Vendor Advisory

CVEs referencing this url
https://www.mozilla.org/security/advisories/mfsa2021-52/

Security Vulnerabilities fixed in Firefox 95 — Mozilla
Vendor Advisory

CVEs referencing this url

Products affected by CVE-2021-43546

Debian » Debian Linux » Version: 9.0
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
Matching versions
Debian » Debian Linux » Version: 10.0
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
Matching versions
Debian » Debian Linux » Version: 11.0
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
Matching versions
Mozilla » Firefox
Versions before (<) 95.0
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
Matching versions
Mozilla » Thunderbird
Versions before (<) 91.4.0
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
Matching versions
Mozilla » Firefox Esr
Versions before (<) 91.4.0
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*
Matching versions