CVE-2024-23647

2024-01-3017:15:10

CWE-287

[email protected]

web.nvd.nist.gov

authentik

identity provider

pkce

vulnerability

cve-2024-23647

cybersecurity

8.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

8.8 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

39.0%

JSON

Authentik is an open-source Identity Provider. There is a bug in our implementation of PKCE that allows an attacker to circumvent the protection that PKCE offers. PKCE adds the code_challenge parameter to the authorization request and adds the code_verifier parameter to the token request. Prior to 2023.8.7 and 2023.10.7, a downgrade scenario is possible: if the attacker removes the code_challenge parameter from the authorization request, authentik will not do the PKCE check. Because of this bug, an attacker can circumvent the protection PKCE offers, such as CSRF attacks and code injection attacks. Versions 2023.8.7 and 2023.10.7 fix the issue.

Affected configurations

Vulners

NVD

Node

goauthentikauthentikRange<2023.8.7

goauthentikauthentikRange2023.10.0–2023.10.7

VendorProductVersionCPE
goauthentikauthentik*cpe:2.3:a:goauthentik:authentik:*:*:*:*:*:*:*:*
goauthentikauthentik*cpe:2.3:a:goauthentik:authentik:*:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
goauthentik	authentik	*	cpe:2.3:a:goauthentik:authentik::::::::
goauthentik	authentik	*	cpe:2.3:a:goauthentik:authentik::::::::

CNA Affected

[
  {
    "vendor": "goauthentik",
    "product": "authentik",
    "versions": [
      {
        "version": "< 2023.8.7",
        "status": "affected"
      },
      {
        "version": ">= 2023.10.0, < 2023.10.7",
        "status": "affected"
      }
    ]
  }
]