- Severity: Critical
- Affected System: Metasploitable3
- Description: This vulnerability allows a remote attacker to execute arbitrary code on the system, caused by an error in the transport protocol. An attacker could exploit this vulnerability to execute arbitrary code on the system.
-
Upgrade Elasticsearch:
- Upgrade to a secure version:
1.6.1
or1.7.0
. - If these versions are not compatible with your environment, consider upgrading to the latest stable release to address security flaws.
- Upgrade to a secure version:
-
Network Access Control:
- Restrict access to the Elasticsearch transport protocol to trusted internal networks only.
- Set up firewall rules to limit access to the port
9200
used by Elasticsearch to internal IPs only.
-
Enable Transport Layer Security (TLS):
- Configure TLS to encrypt communications between Elasticsearch nodes and protect against unauthorized access.
-
Monitor and Log Traffic:
- Enable logging and monitor network traffic to detect any unauthorized access or unusual activity.
- Use a Web Application Firewall (WAF) to provide an additional layer of security.
- Regularly update Elasticsearch and related software to the latest versions.