SB2018061414 - Input validation error in Matrix Synapse
Published: June 14, 2018 Updated: August 8, 2020
Security Bulletin ID
SB2018061414
CSH 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 vulnerability.
1) Input validation error (CVE-ID: CVE-2018-12423)
The vulnerability allows a remote non-authenticated attacker to manipulate data.
In Synapse before 0.31.2, unauthorised users can hijack rooms when there is no m.room.power_levels event in force.
Remediation
Install update from vendor's website.