CVE-2021-38506

CVSS V2 Medium 4.3 CVSS V3 Medium 4.3
Description
Through a series of navigations, Firefox could have entered fullscreen mode without notification or warning to the user. This could lead to spoofing attacks on the browser UI including phishing. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.
Overview
  • CVE ID
  • CVE-2021-38506
  • Assigner
  • security@mozilla.org
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2021-12-08T22:15:08
  • Last Modified Date
  • 2022-12-09T15:31:26
Weakness Enumerations
CWE URL
CWE-1021 http://cwe.mitre.org/data/definitions/1021.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* 1 OR 94.0
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* 1 OR 91.3.0
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* 1 OR 91.3.0
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* 1 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:M/Au:N/C:N/I:P/A:N
  • Access Vector
  • NETWORK
  • Access Compatibility
  • MEDIUM
  • Authentication
  • NONE
  • Confidentiality Impact
  • NONE
  • Integrity Impact
  • PARTIAL
  • Availability Impact
  • NONE
  • Base Score
  • 4.3
  • Severity
  • MEDIUM
  • Exploitability Score
  • 8.6
  • Impact Score
  • 2.9
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • NONE
  • User Interaction
  • REQUIRED
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • NONE
  • Availability Impact
  • NONE
  • Base Score
  • 4.3
  • Base Severity
  • MEDIUM
  • Exploitability Score
  • 2.8
  • Impact Score
  • 1.4
References
Reference URL Reference Tags
https://bugzilla.mozilla.org/show_bug.cgi?id=1730750 Issue Tracking Permissions Required Vendor Advisory
https://lists.debian.org/debian-lts-announce/2021/12/msg00030.html Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html Mailing List Third Party Advisory
https://security.gentoo.org/glsa/202202-03 Third Party Advisory
https://security.gentoo.org/glsa/202208-14
https://www.debian.org/security/2021/dsa-5026 Third Party Advisory
https://www.debian.org/security/2022/dsa-5034 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2021-48/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2021-49/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2021-50/ Vendor Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2021-38506
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-38506
History
Created Old Value New Value Data Type Notes
2022-05-10 15:48:07 Added to TrackCVE
2022-12-06 03:24:43 2021-12-08T22:15Z 2021-12-08T22:15:08 CVE Published Date updated
2022-12-06 03:24:43 2022-08-10T20:15:21 CVE Modified Date updated
2022-12-06 03:24:43 Undergoing Analysis Vulnerability Status updated
2022-12-06 03:24:49 References updated
2022-12-09 16:13:12 2022-12-09T15:31:26 CVE Modified Date updated
2022-12-09 16:13:12 Undergoing Analysis Analyzed Vulnerability Status updated