CVE-2017-3163: Apache Solr ReplicationHandler path traversal attack Severity: Moderate Vendor: The Apache Software Foundation Versions Affected: Solr 1.4 to 6.4.0 Description: When using the Index Replication feature, Solr nodes can pull index files from a master/leader node using an HTTP API which accepts a file name. However, Solr did not validate the file name, hence it was possible to craft a special request involving path traversal, leaving any file readable to the Solr server process exposed. Solr servers protected and restricted by firewall rules and/or authentication would not be at risk since only trusted clients and users would gain direct HTTP access. Mitigation: 6.x users should upgrade to 6.4.1 5.x users should upgrade to 5.5.4 4.x, 3.x and 1.4 users should upgrade to a supported version of Solr or setup proper firewalling, or disable the ReplicationHandler if not in use. Credit: This issue was discovered by ﻿Hrishikesh Gadre of Cloudera Inc. References: https://issues.apache.org/jira/browse/SOLR-10031 https://wiki.apache.org/solr/SolrSecurity The Lucene PMC