CVE-2021-4221

2022-12-2220:15:12

mozilla

web.nvd.nist.gov

cve-2021-4221

domain name

rtl character

rendering issue

user confusion

spoofing attacks

firefox for android

CVSS3

4.3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

AI Score

5.3

Confidence

Low

EPSS

0.001

Percentile

37.2%

JSON

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.

Affected configurations

Nvd

Vulners

Node

mozillafirefoxRange<92.0

AND

googleandroidMatch-

VendorProductVersionCPE
mozillafirefox*cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
googleandroid-cpe:2.3:o:google:android:-:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
mozilla	firefox	*	cpe:2.3:a:mozilla:firefox::::::::
google	android	-	cpe:2.3:o:google:android:-:::::::*

CNA Affected

[
  {
    "vendor": "Mozilla",
    "product": "Firefox",
    "versions": [
      {
        "version": "unspecified",
        "lessThan": "92",
        "status": "affected",
        "versionType": "custom"
      }
    ]
  }
]