ElasticSearch v1.1.1/1.2 RCE

Anandhu K A
Published on
16 Jun 2021

Elasticsearch is a search server based on Lucene. The old versions of ElasticSearch support passing in dynamic scripts (MVEL) to perform some complex operations, and MVEL can execute Java code, and there is no sandbox, so a user can directly execute arbitrary code.

Mitigation / Precaution

  • In order to patch this vulnerability, we suggest you to update ElasticSearch to the latest version.
  • We recommend you to configure ‘script.disable_dynamic: true’ in elasticsearch.yml.
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Written by
Anandhu K A
Anandhu K A
Lead Engineer
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