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security: fix CVE-2024-47077 (cherry-pick #11535) (#11537)

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security: fix CVE-2024-47077 (#11535)

Signed-off-by: Jens Langhammer <jens@goauthentik.io>
Co-authored-by: Jens L. <jens@goauthentik.io>
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gcp-cherry-pick-bot[bot]
2024-09-27 16:19:24 +02:00
committed by GitHub
parent 09125b6236
commit 57a31b5dd1
4 changed files with 63 additions and 3 deletions
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# CVE-2024-47077
_Reported by [@quentinmit](https://github.com/quentinmit)_
## Insufficient cross-provider token validation during introspection
### Summary
Access tokens issued to one application can be stolen by that application and used to impersonate the user against any other proxy provider. Also, a user can steal an access token they were legitimately issued for one application and use it to access another application that they aren't allowed to access.
### Details
The proxy provider uses `/application/o/introspect/` to validate bearer tokens provided in the `Authorization` header:
The implementation of this endpoint separately validates the `client_id` and `client_secret` (which are that of the proxy provider) and the `token` without validating that they correspond to the same provider.
### Patches
authentik 2024.6.5 and 2024.8.3 fix this issue.
### For more information
If you have any questions or comments about this advisory:
- Email us at [security@goauthentik.io](mailto:security@goauthentik.io)