{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata — refreshed continuously.","feed_url":"https://feed.craftedsignal.io/tags/elasticsearch/","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cves":[],"_cs_exploited":false,"_cs_products":["Elasticsearch"],"_cs_severities":["medium"],"_cs_tags":["elasticsearch","initial-access","reconnaissance","network"],"_cs_type":"advisory","_cs_vendors":["Elastic"],"content_html":"\u003cp\u003eThis detection rule identifies Elasticsearch nodes that do not have Transport Layer Security (TLS) enabled, lack authentication mechanisms, and are accepting inbound network connections over the default Elasticsearch port (9200). Elasticsearch is a search and analytics engine, and misconfigured instances can be vulnerable to unauthorized access. This rule aims to detect initial access attempts by identifying connections lacking authentication headers, which indicates a potential exploitation attempt. The rule is triggered by inbound HTTP traffic on port 9200 without authorization headers. The rule leverages network traffic data to identify insecure configurations.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eAn attacker scans the network for exposed Elasticsearch nodes on port 9200.\u003c/li\u003e\n\u003cli\u003eThe attacker identifies an Elasticsearch node that lacks TLS and authentication.\u003c/li\u003e\n\u003cli\u003eThe attacker establishes an inbound HTTP connection to the exposed Elasticsearch node on port 9200.\u003c/li\u003e\n\u003cli\u003eThe HTTP request from the attacker does not contain an authorization header.\u003c/li\u003e\n\u003cli\u003eThe Elasticsearch node responds with a 200 OK status code, indicating a successful connection.\u003c/li\u003e\n\u003cli\u003eThe attacker sends requests to access sensitive data or manipulate the Elasticsearch cluster.\u003c/li\u003e\n\u003cli\u003eThe attacker exfiltrates data or disrupts services due to the lack of security controls.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of unsecured Elasticsearch nodes can lead to significant data breaches, service disruption, and reputational damage. An attacker can gain unauthorized access to sensitive data stored in the Elasticsearch cluster, leading to data exfiltration or manipulation. Depending on the data stored, this could expose personally identifiable information (PII), financial data, or other confidential information. Service disruption can occur due to unauthorized modifications or deletion of indices.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eEnable Sysmon network connection logging to activate the rules below.\u003c/li\u003e\n\u003cli\u003eDeploy the Sigma rules in this brief to your SIEM and tune for your environment.\u003c/li\u003e\n\u003cli\u003eEnsure that the \u003ccode\u003eHTTP\u003c/code\u003e protocol configuration in \u003ccode\u003epacketbeat.yml\u003c/code\u003e includes port \u003ccode\u003e9200\u003c/code\u003e and \u003ccode\u003esend_all_headers\u003c/code\u003e as documented in the references.\u003c/li\u003e\n\u003cli\u003eImplement Transport Layer Security (TLS) and enable authentication mechanisms on all Elasticsearch nodes, referencing the Elasticsearch security configuration guide.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2024-01-03T14:25:00Z","date_published":"2024-01-03T14:25:00Z","id":"/briefs/2024-01-unsecure-elasticsearch/","summary":"This rule identifies potentially unsecured Elasticsearch nodes that lack TLS and/or authentication and are accepting inbound network connections, which could allow adversaries to gain initial access, exfiltrate data, or disrupt services.","title":"Unsecured Elasticsearch Node Inbound Connection","url":"https://feed.craftedsignal.io/briefs/2024-01-unsecure-elasticsearch/"}],"language":"en","title":"CraftedSignal Threat Feed — Elasticsearch","version":"https://jsonfeed.org/version/1.1"}