#VU23098 Improper Authentication in Synapse
Published: November 29, 2019
Vulnerability identifier: #VU23098
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: N/A
CWE-ID: CWE-287
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Synapse
Synapse
Software vendor:
Matrix.org
Matrix.org
Description
The vulnerability allows a remote attacker to bypass authentication process.
The vulnerability exists due to the application does not remove local threepids upon user deactivation and allows access for deactivated accounts.The problem resides within the "/synapse/storage/data_stores/main/registration.py" and "/synapse/handlers/deactivate_account.py" scripts.
A remote attacker can bypass authentication and gain unauthorized access to the application.
Remediation
Install updates from vendor's website.