Information Exposure Affecting org.apache.solr:solr-core package, versions [5.3.0,5.5.5) [6.0.0,6.6.0)

  • Attack Complexity


  • Integrity


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  • snyk-id


  • published

    31 Aug 2017

  • disclosed

    6 Jul 2017

  • credit

    Noble Paul

How to fix?

Upgrade org.apache.solr:solr-core to version 6.6.0 or higher.


org.apache.solr:solr-core is an open source enterprise search platform built on Apache Lucene.

Affected versions of the package are vulnerable to Information Exposure.

Apache Solr uses a PKI based mechanism to secure inter-node communication when security is enabled. It is possible to create a specially crafted node name that does not exist as part of the cluster and point it to a malicious node. This can trick the nodes in cluster to believe that the malicious node is a member of the cluster. So, if Solr users have enabled BasicAuth authentication mechanism using the BasicAuthPlugin or if the user has implemented a custom Authentication plugin, which does not implement either "HttpClientInterceptorPlugin" or "HttpClientBuilderPlugin", his/her servers are vulnerable to this attack. Users who only use SSL without basic authentication or those who use Kerberos are not affected.