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cvelistGitHub_MCVELIST:CVE-2023-48228
HistoryNov 21, 2023 - 8:48 p.m.

CVE-2023-48228 OAuth2: PKCE can be fully circumvented

2023-11-2120:48:32
CWE-287
GitHub_M
www.cve.org
3
oauth2
pkce
circumvention
identity provider
vulnerability
fix

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

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

AI Score

9.6

Confidence

High

EPSS

0.001

Percentile

44.8%

JSON

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.

CNA Affected

[
  {
    "vendor": "goauthentik",
    "product": "authentik",
    "versions": [
      {
        "version": "< 2023.10.4",
        "status": "affected"
      },
      {
        "version": "< 2023.8.5",
        "status": "affected"
      }
    ]
  }
]

Related

osv 1
nvd 1
prion 1
veracode 1
cve 1
osv
osv
CVE-2023-48228
2023-11-21 21:15:08
nvd
nvd
CVE-2023-48228
2023-11-21 21:15:08
prion
prion
Design/Logic Flaw
2023-11-21 21:15:00
veracode
veracode
Authentication Bypass
2023-11-22 06:03:58
cve
cve
CVE-2023-48228
2023-11-21 21:15:08

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

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

AI Score

9.6

Confidence

High

EPSS

0.001

Percentile

44.8%

JSON
Related for CVELIST:CVE-2023-48228
osv1nvd1prion1veracode1cve1