SB2018050901 - Remote denial of service in Matrix Synapse
Published: May 9, 2018
Security Bulletin ID
SB2018050901
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper input validation (CVE-ID: CVE-2018-10657)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.The vulnerability exists due to an input validation error where malicious events injected with depth = 2^63 - 1 render rooms unusable, related to federation/federation_base.py and handlers/message.py. A remote attacker can send malicious messages and perform a denial of service attack.
Note: this vulnerability has been exploited in the wild in April 2018.
Remediation
Install update from vendor's website.