CVE-2024-3651 Denial of Service via Quadratic Complexity in kjd/idna

2024-07-0717:22:10

CWE-400

@huntr_ai

www.cve.org

denial of service

quadratic complexity

crafted input

CVSS3

6.2

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

0.001

Percentile

17.3%

JSON

A vulnerability was identified in the kjd/idna library, specifically within the idna.encode() function, affecting version 3.6. The issue arises from the function’s handling of crafted input strings, which can lead to quadratic complexity and consequently, a denial of service condition. This vulnerability is triggered by a crafted input that causes the idna.encode() function to process the input with considerable computational load, significantly increasing the processing time in a quadratic manner relative to the input size.

CNA Affected

[
  {
    "vendor": "kjd",
    "product": "kjd/idna",
    "versions": [
      {
        "version": "unspecified",
        "lessThan": "3.7",
        "status": "affected",
        "versionType": "custom"
      }
    ]
  }
]