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osvGoogleOSV:CVE-2023-48228
HistoryNov 21, 2023 - 9:15 p.m.

CVE-2023-48228

2023-11-2121:15:08
Google
osv.dev
5
authentik
oauth2 flow
code_verifier

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

6.6

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.

Related

cvelist 1
nvd 1
prion 1
veracode 1
cve 1
cvelist
cvelist
CVE-2023-48228 OAuth2: PKCE can be fully circumvented
2023-11-21 20:48:32
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

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

6.6

Confidence

High

EPSS

0.001

Percentile

44.8%

JSON
Related for OSV:CVE-2023-48228
cvelist1nvd1prion1veracode1cve1