CVE-2021-4221

Severity Score

4.3

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

If a domain name contained a RTL character, it would cause the domain to be rendered to the right of the path. This could lead to user confusion and spoofing attacks. <br>*This bug only affects Firefox for Android. Other operating systems are unaffected.*<br>*Note*: Due to a clerical error this advisory was not included in the original announcement, and was added in Feburary 2022. This vulnerability affects Firefox < 92.

Si un nombre de dominio contuviera un carácter RTL, el dominio se representaría a la derecha de la ruta. Esto podría generar confusión en el usuario y ataques de suplantación de identidad. <br>*Este error sólo afecta a Firefox para Android. Otros sistemas operativos no se ven afectados.*<br>*Nota*: Debido a un error administrativo, este aviso no se incluyó en el anuncio original y se agregó en febrero de 2022. Esta vulnerabilidad afecta a Firefox < 92.

*Credits: N/A

CVSS Scores

NISTv3.1 4.3

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2022-02-18 CVE Reserved
2022-12-22 CVE Published
2024-07-14 EPSS Updated
2024-08-03 CVE Updated
2024-08-03 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CAPEC

References (2)

URL	Tag	Source

URL	Date	SRC
https://bugzilla.mozilla.org/show_bug.cgi?id=1704422	2024-08-03

URL	Date	SRC

URL	Date	SRC
https://www.mozilla.org/security/advisories/mfsa2021-38	2022-12-24

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"	< 92.0 Search vendor "Mozilla" for product "Firefox" and version " < 92.0"	-	Affected	in	Google Search vendor "Google"	Android Search vendor "Google" for product "Android"	-	-	Safe