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[email protected]CVE-2021-43533

HistoryDec 08, 2021 - 10:15 p.m.

CVE-2021-43533

2021-12-0822:15:09

[email protected]

web.nvd.nist.gov

cve-2021-43533

firefox

url parsing

internationalized domain names

security vulnerability

nvd

phishing

CVSS2

4.3

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:M/Au:N/C:N/I:P/A:N

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

4.8

Confidence

High

EPSS

0.001

Percentile

33.3%

JSON

When parsing internationalized domain names, high bits of the characters in the URLs were sometimes stripped, resulting in inconsistencies that could lead to user confusion or attacks such as phishing. This vulnerability affects Firefox < 94.

Affected configurations

Vulners

NVD

Node

mozillafirefoxRange≤94

VendorProductVersionCPE
mozillafirefox*cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
mozilla	firefox	*	cpe:2.3:a:mozilla:firefox::::::::

CNA Affected

[
  {
    "product": "Firefox",
    "vendor": "Mozilla",
    "versions": [
      {
        "lessThan": "94",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      }
    ]
  }
]