CVE-2021-38506
Mozilla: Firefox could be coaxed into going into fullscreen mode without notification or warning
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
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.
Mediante de una serie de navegaciones, Firefox podría haber entrado en modo de pantalla completa sin notificación o advertencia al usuario. Esto podría conllevar a ataques de suplantación de identidad en la Interfaz de Usuario del navegador, incluido el phishing. Esta vulnerabilidad afecta a Firefox versiones anteriores a 94, Thunderbird versiones anteriores a 91.3, y Firefox ESR versiones anteriores a 91.3
The Mozilla Foundation Security Advisory describes this flaw as:
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.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2021-08-10 CVE Reserved
- 2021-11-03 CVE Published
- 2024-08-04 CVE Updated
- 2024-08-23 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-1021: Improper Restriction of Rendered UI Layers or Frames
CAPEC
References (11)
| URL | Tag | Source |
|---|---|---|
| https://lists.debian.org/debian-lts-announce/2021/12/msg00030.html | Mailing List |
|
| https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html | Mailing List |
|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://security.gentoo.org/glsa/202202-03 | 2022-12-09 | |
| https://security.gentoo.org/glsa/202208-14 | 2022-12-09 | |
| https://www.debian.org/security/2021/dsa-5026 | 2022-12-09 | |
| https://www.debian.org/security/2022/dsa-5034 | 2022-12-09 | |
| https://www.mozilla.org/security/advisories/mfsa2021-48 | 2022-12-09 | |
| https://www.mozilla.org/security/advisories/mfsa2021-49 | 2022-12-09 | |
| https://www.mozilla.org/security/advisories/mfsa2021-50 | 2022-12-09 | |
| https://access.redhat.com/security/cve/CVE-2021-38506 | 2021-11-10 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2019624 | 2021-11-10 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Mozilla Search vendor "Mozilla" | Firefox Search vendor "Mozilla" for product "Firefox" | < 94.0 Search vendor "Mozilla" for product "Firefox" and version " < 94.0" | - |
Affected
| ||||||
| Mozilla Search vendor "Mozilla" | Firefox Esr Search vendor "Mozilla" for product "Firefox Esr" | < 91.3.0 Search vendor "Mozilla" for product "Firefox Esr" and version " < 91.3.0" | - |
Affected
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| Mozilla Search vendor "Mozilla" | Thunderbird Search vendor "Mozilla" for product "Thunderbird" | < 91.3.0 Search vendor "Mozilla" for product "Thunderbird" and version " < 91.3.0" | - |
Affected
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| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0" | - |
Affected
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| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0" | - |
Affected
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| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 11.0 Search vendor "Debian" for product "Debian Linux" and version "11.0" | - |
Affected
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