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GHSA-26c5-ppr8-f33p
No affected components available
Impact
It may be possible for a deactivated user to login when using uncommon configurations.
This only applies if any of the following are true:
- JSON Web Tokens are enabled for login via the
jwt_config.enabledconfiguration setting - The local password database is enabled via the
password_config.enabledandpassword_config.localdb_enabledconfiguration settings and a user's password is updated via an admin API after a user is deactivated.
Note that the local password database is enabled by default, but it is uncommon to set a user's password after they've been deactivated.
Installations that are configured to only allow login via Single Sign-On (SSO) via CAS, SAML or OpenID Connect (OIDC); or via an external password provider (e.g. LDAP) are not affected.
Patches
- If using JSON Web Token logins: #15624
- For other users: #15634
Workarounds
If not using JSON Web Tokens, ensure that deactivated users do not have a password set. This list of users can be queried from PostgreSQL:
SELECT name FROM users WHERE password_hash IS NOT NULL AND deactivated = 1;
The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker needs basic access or low-level privileges. 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 low impact on the confidentiality of the information. There is a low impact on the integrity of the data.
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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