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GHSA-jgf4-vwc3-r46v
No affected components available
Impact
When relying on SSO providers in combination with local authentication it can be possible to enumerate existing SSO users in the instance. This is possible because if an email address exists in Directus and belongs to a known SSO provider then it will throw a "helpful" error that the user belongs to another provider.
Reproduction
- Create a user using a SSO provider
test@directus.io. - Try to log-in using the regular login form (or the API)
- When using a valid email address
| APP | API |
| --- | --- |
| |
|
- When using an invalid email address
| APP | API |
| --- | --- |
| |
|
- Using this differing error it is possible to determine whether a specific email address is present in the Directus instance as an SSO user.
Workarounds
When only using SSO for authentication then you can work around this issue by disabling local login using the following environment variable AUTH_DISABLE_DEFAULT="true"
References
Implemented as feature in https://github.com/directus/directus/pull/13184 https://owasp.org/www-project-web-security-testing-guide/v42/4-Web_Application_Security_Testing/03-Identity_Management_Testing/04-Testing_for_Account_Enumeration_and_Guessable_User_Account
The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a high impact on the confidentiality of the information.
Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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