Improper access control in Synapse - CVE-2023-32682
Published: June 7, 2023 / Updated: June 8, 2023
Vulnerability identifier: #VU77060
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2023-32682
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Matrix.org
Affected software:
Synapse
Synapse
Detailed vulnerability description
The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.
The vulnerability exists due to improper checks for deactivated users during login. A remote user can login when using uncommon configurations.
How to mitigate CVE-2023-32682
Install updates from vendor's website.
Sources
- https://github.com/matrix-org/synapse/security/advisories/GHSA-26c5-ppr8-f33p
- https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html#password_config
- https://github.com/matrix-org/synapse/pull/15624
- https://matrix-org.github.io/synapse/latest/admin_api/user_admin_api.html#create-or-modify-account
- https://matrix-org.github.io/synapse/latest/jwt.html
- https://github.com/matrix-org/synapse/pull/15634
- https://github.com/matrix-org/synapse/releases/tag/v1.85.0