CVE-2021-4236

2022-12-2722:15:12

CWE-476

web.nvd.nist.gov

cve-2021-4236

web sockets

authenticatemethod

nil pointer

authentication bypass

nvd

CVSS3

9.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

AI Score

9.5

Confidence

High

EPSS

0.002

Percentile

57.3%

JSON

Web Sockets do not execute any AuthenticateMethod methods which may be set, leading to a nil pointer dereference if the returned UserData pointer is assumed to be non-nil, or authentication bypass. This issue only affects WebSockets with an AuthenticateMethod hook. Request handlers that do not explicitly use WebSockets are not vulnerable.

Affected configurations

Nvd

Node

web_projectwebRange1.4.0–1.5.2go

VendorProductVersionCPE
web_projectweb*cpe:2.3:a:web_project:web:*:*:*:*:*:go:*:*

Vendor	Product	Version	CPE
web_project	web	*	cpe:2.3:a:web_project:web::::::go::*

CNA Affected

[
  {
    "vendor": "github.com/ecnepsnai/web",
    "product": "github.com/ecnepsnai/web",
    "collectionURL": "https://pkg.go.dev",
    "packageName": "github.com/ecnepsnai/web",
    "versions": [
      {
        "version": "1.4.0",
        "lessThan": "1.5.2",
        "status": "affected",
        "versionType": "semver"
      }
    ],
    "programRoutines": [
      {
        "name": "Server.socketHandler"
      },
      {
        "name": "Server.Socket"
      }
    ],
    "defaultStatus": "unaffected"
  }
]