CVE-2023-48228
Authentik OAuth2 PKCE Verification Bypass
Description
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.
INFO
Published Date :
Nov. 21, 2023, 9:15 p.m.
Last Modified :
Nov. 29, 2023, 2:35 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.9
Exploitability Score :
3.9
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2023-48228.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2023-48228 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2023-48228 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Nov. 29, 2023
Action Type Old Value New Value Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Changed Reference Type https://github.com/goauthentik/authentik/blob/dd4e9030b4e667d3720be2feda24c08972602274/authentik/providers/oauth2/views/token.py#L225 No Types Assigned https://github.com/goauthentik/authentik/blob/dd4e9030b4e667d3720be2feda24c08972602274/authentik/providers/oauth2/views/token.py#L225 Product Changed Reference Type https://github.com/goauthentik/authentik/commit/3af77ab3821fe9c7df8055ba5eade3d1ecea03a6 No Types Assigned https://github.com/goauthentik/authentik/commit/3af77ab3821fe9c7df8055ba5eade3d1ecea03a6 Patch Changed Reference Type https://github.com/goauthentik/authentik/commit/6b9afed21f7c39f171a4a445654cfe415bba37d5 No Types Assigned https://github.com/goauthentik/authentik/commit/6b9afed21f7c39f171a4a445654cfe415bba37d5 Patch Changed Reference Type https://github.com/goauthentik/authentik/commit/b88e39411c12e3f9e04125a7887f12354f760a14 No Types Assigned https://github.com/goauthentik/authentik/commit/b88e39411c12e3f9e04125a7887f12354f760a14 Patch Changed Reference Type https://github.com/goauthentik/authentik/pull/7666 No Types Assigned https://github.com/goauthentik/authentik/pull/7666 Patch Changed Reference Type https://github.com/goauthentik/authentik/pull/7668 No Types Assigned https://github.com/goauthentik/authentik/pull/7668 Patch Changed Reference Type https://github.com/goauthentik/authentik/pull/7669 No Types Assigned https://github.com/goauthentik/authentik/pull/7669 Patch Changed Reference Type https://github.com/goauthentik/authentik/releases/tag/version%2F2023.10.4 No Types Assigned https://github.com/goauthentik/authentik/releases/tag/version%2F2023.10.4 Release Notes Changed Reference Type https://github.com/goauthentik/authentik/releases/tag/version%2F2023.8.5 No Types Assigned https://github.com/goauthentik/authentik/releases/tag/version%2F2023.8.5 Release Notes Changed Reference Type https://github.com/goauthentik/authentik/security/advisories/GHSA-fm34-v8xq-f2c3 No Types Assigned https://github.com/goauthentik/authentik/security/advisories/GHSA-fm34-v8xq-f2c3 Exploit, Vendor Advisory Added CPE Configuration OR *cpe:2.3:a:goauthentik:authentik:*:*:*:*:*:*:*:* versions up to (excluding) 2023.8.5 *cpe:2.3:a:goauthentik:authentik:*:*:*:*:*:*:*:* versions from (including) 2023.10.0 up to (excluding) 2023.10.4 -
CVE Received by [email protected]
Nov. 21, 2023
Action Type Old Value New Value Added Description 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. Added Reference GitHub, Inc. https://github.com/goauthentik/authentik/security/advisories/GHSA-fm34-v8xq-f2c3 [No types assigned] Added Reference GitHub, Inc. https://github.com/goauthentik/authentik/pull/7666 [No types assigned] Added Reference GitHub, Inc. https://github.com/goauthentik/authentik/pull/7668 [No types assigned] Added Reference GitHub, Inc. https://github.com/goauthentik/authentik/pull/7669 [No types assigned] Added Reference GitHub, Inc. https://github.com/goauthentik/authentik/commit/3af77ab3821fe9c7df8055ba5eade3d1ecea03a6 [No types assigned] Added Reference GitHub, Inc. https://github.com/goauthentik/authentik/commit/6b9afed21f7c39f171a4a445654cfe415bba37d5 [No types assigned] Added Reference GitHub, Inc. https://github.com/goauthentik/authentik/commit/b88e39411c12e3f9e04125a7887f12354f760a14 [No types assigned] Added Reference GitHub, Inc. https://github.com/goauthentik/authentik/blob/dd4e9030b4e667d3720be2feda24c08972602274/authentik/providers/oauth2/views/token.py#L225 [No types assigned] Added Reference GitHub, Inc. https://github.com/goauthentik/authentik/releases/tag/version%2F2023.10.4 [No types assigned] Added Reference GitHub, Inc. https://github.com/goauthentik/authentik/releases/tag/version%2F2023.8.5 [No types assigned] Added CWE GitHub, Inc. CWE-287 Added CVSS V3.1 GitHub, Inc. AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2023-48228 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2023-48228
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.13 }} 0.02%
score
0.49306
percentile