SB2019112906 - Authentication bypass in Synapse
Published: November 29, 2019
Security Bulletin ID
SB2019112906
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper Authentication (CVE-ID: N/A)
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 update from vendor's website.