Vulnerability · Published Nov 21, 2024 · Assigned by GitHub_M
CVE-2024-52289authentik has an insecure default configuration for OAuth2 Redirect URIs
High 7.9
In plain English
A high-severity security flaw in authentik from goauthentik. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.1% (higher than 66% of all known vulnerabilities).
Official description
authentik is an open-source identity provider. Redirect URIs in the OAuth2 provider in authentik are checked by RegEx comparison. When no Redirect URIs are configured in a provider, authentik will automatically use the first redirect_uri value received as an allowed redirect URI, without escaping characters that have a special meaning in RegEx. Similarly, the documentation did not take this into consideration either. Given a provider with the Redirect URIs set to https://foo.example.com, an attacker can register a domain fooaexample.com, and it will correctly pass validation. authentik 2024.8.5 and 2024.10.3 fix this issue. As a workaround, When configuring OAuth2 providers, make sure to escape any wildcard characters that are not intended to function as a wildcard, for example replace `.` with `\.`.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| goauthentik | authentik | < 2024.8.5>= 2024.10.0-rc1, < 2024.10.3 |
Weakness: CWE-185 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H
References
- https://github.com/goauthentik/authentik/security/advisories/GHSA-3q5w-6m3x-64gj x_refsource_CONFIRM
- https://github.com/goauthentik/authentik/commit/85bb638243c8d7ea42ddd3b15b3f51a90d2b8c54 x_refsource_MISC
- https://www.vicarius.io/vsociety/posts/cve-2024-52289-detect-authentik-vulnerability
- https://www.vicarius.io/vsociety/posts/cve-2024-52289-mitigate-authentik-vulnerability