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CVE-2023-48228 (GCVE-0-2023-48228)

Vulnerability from cvelistv5 – Published: 2023-11-21 20:48 – Updated: 2024-08-02 21:23
VLAI
Title
OAuth2: PKCE can be fully circumvented
Summary
authentik is an open-source identity provider. When initialising a oauth2 flow with a `code_challenge` and `code_method` (thus requesting PKCE), the single sign-on provider (authentik) must check if there is a matching and existing `code_verifier` during the token step. Prior to versions 2023.10.4 and 2023.8.5, authentik checks if the contents of `code_verifier` is matching only when it is provided. When it is left out completely, authentik simply accepts the token request with out it; even when the flow was started with a `code_challenge`. authentik 2023.8.5 and 2023.10.4 fix this issue.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CWE
  • CWE-287 - Improper Authentication
Assigner
References
Impacted products
Vendor Product Version CPE status
goauthentik authentik Affected: < 2023.10.4
Affected: < 2023.8.5
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

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    "redhat_vex": {
      "current_release_date": "2025-05-28T23:35:33+00:00",
      "cve": "CVE-2023-48228",
      "id": "CVE-2023-48228",
      "initial_release_date": "2023-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "OAuth2: PKCE can be fully circumvented",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-48228.json",
      "version": "3"
    }
  }
}



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