CVE-2023-32682
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.
Does this matter?
Lower severity and a low EPSS score (0.75%). Track it; it rarely justifies an emergency change on its own.
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 3.1
- 5.4 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
- EPSS
- 0.75% probability · 53th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-287
- Affected
- matrix/synapse
- Source
- security-advisories@github.com
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-f33pMitigation, Patch, Vendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/X6DH5A5YEB5LRIPP32OUW25FCGZFCZU2/
- https://matrix-org.github.io/synapse/latest/admin_api/user_admin_api.html#create-or-modify-accountProduct
- https://matrix-org.github.io/synapse/latest/jwt.htmlProduct
- https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html#password_configProduct
- 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-f33pMitigation, Patch, Vendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/X6DH5A5YEB5LRIPP32OUW25FCGZFCZU2/
- https://matrix-org.github.io/synapse/latest/admin_api/user_admin_api.html#create-or-modify-accountProduct
- https://matrix-org.github.io/synapse/latest/jwt.htmlProduct
- https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html#password_configProduct
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.