Vulnerability Description
Synapse is a Matrix protocol homeserver written in Python with the Twisted framework. In affected versions it may be possible for a deactivated user to login when using uncommon configurations. This only applies if any of the following are true: 1. JSON Web Tokens are enabled for login via the `jwt_config.enabled` configuration setting. 2. The local password database is enabled via the `password_config.enabled` and `password_config.localdb_enabled` configuration 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. If not using JSON Web Tokens, ensure that deactivated users do not have a password set. This issue has been addressed in version 1.85.0. Users are advised to upgrade.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Matrix | Synapse | < 1.85.0 |
Related Weaknesses (CWE)
References
- https://github.com/matrix-org/synapse/pull/15624Patch
- https://github.com/matrix-org/synapse/pull/15634Patch
- https://github.com/matrix-org/synapse/security/advisories/GHSA-26c5-ppr8-f33pMitigationPatchVendor Advisory
- https://lists.fedoraproject.org/archives/list/[email protected]
- https://matrix-org.github.io/synapse/latest/admin_api/user_admin_api.html#createProduct
- https://matrix-org.github.io/synapse/latest/jwt.htmlProduct
- https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentaProduct
- https://github.com/matrix-org/synapse/pull/15624Patch
- https://github.com/matrix-org/synapse/pull/15634Patch
- https://github.com/matrix-org/synapse/security/advisories/GHSA-26c5-ppr8-f33pMitigationPatchVendor Advisory
- https://lists.fedoraproject.org/archives/list/[email protected]
- https://matrix-org.github.io/synapse/latest/admin_api/user_admin_api.html#createProduct
- https://matrix-org.github.io/synapse/latest/jwt.htmlProduct
- https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentaProduct
FAQ
What is CVE-2023-32682?
CVE-2023-32682 is a vulnerability with a CVSS score of 5.4 (MEDIUM). Synapse is a Matrix protocol homeserver written in Python with the Twisted framework. In affected versions it may be possible for a deactivated user to login when using uncommon configurations. This o...
How severe is CVE-2023-32682?
CVE-2023-32682 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-32682?
Check the references section above for vendor advisories and patch information. Affected products include: Matrix Synapse.