CVE-2024-23647
PKCE downgrade attack in Authentik
Description
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.
INFO
Published Date :
Jan. 30, 2024, 5:15 p.m.
Last Modified :
Nov. 21, 2024, 8:58 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | HIGH | [email protected] |
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-2024-23647.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2024-23647 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-2024-23647
weaknesses.
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-2024-23647 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2024-23647 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 af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://github.com/goauthentik/authentik/commit/38e04ae12720e5d81b4f7ac77997eb8d1275d31a Added Reference https://github.com/goauthentik/authentik/security/advisories/GHSA-mrx3-gxjx-hjqj -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Feb. 06, 2024
Action Type Old Value New Value Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Changed Reference Type https://github.com/goauthentik/authentik/commit/38e04ae12720e5d81b4f7ac77997eb8d1275d31a No Types Assigned https://github.com/goauthentik/authentik/commit/38e04ae12720e5d81b4f7ac77997eb8d1275d31a Patch Changed Reference Type https://github.com/goauthentik/authentik/security/advisories/GHSA-mrx3-gxjx-hjqj No Types Assigned https://github.com/goauthentik/authentik/security/advisories/GHSA-mrx3-gxjx-hjqj Third Party Advisory Added CPE Configuration OR *cpe:2.3:a:goauthentik:authentik:*:*:*:*:*:*:*:* versions up to (excluding) 2023.8.7 *cpe:2.3:a:goauthentik:authentik:*:*:*:*:*:*:*:* versions from (including) 2023.10.0 up to (excluding) 2023.10.7 -
CVE Received by [email protected]
Jan. 30, 2024
Action Type Old Value New Value Added Description 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. Added Reference GitHub, Inc. https://github.com/goauthentik/authentik/security/advisories/GHSA-mrx3-gxjx-hjqj [No types assigned] Added Reference GitHub, Inc. https://github.com/goauthentik/authentik/commit/38e04ae12720e5d81b4f7ac77997eb8d1275d31a [No types assigned] Added CWE GitHub, Inc. CWE-287 Added CVSS V3.1 GitHub, Inc. AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Vulnerability Scoring Details
Base CVSS Score: 8.8
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.06 }} 0.01%
score
0.17382
percentile