Title: CVE-2020-13941: Apache Solr information disclosure vulnerability category: solr/security cve: CVE-2020-13941
Severity: Medium
Versions Affected:
Before Solr 8.6. Some risks are specific to Windows.
Description: Reported in SOLR-14515 (private) and fixed in SOLR-14561 (public), released in Solr version 8.6.0. The Replication handler (https://lucene.apache.org/solr/guide/8_6/index-replication.html#http-api-commands-for-the-replicationhandler) allows commands backup, restore and deleteBackup. Each of these take a location parameter, which was not validated, i.e you could read/write to any location the solr user can access.
On a windows system SMB paths such as \10.0.0.99\share\folder may also be used, leading to:
Mitigation: Upgrade to Solr 8.6, and/or ensure only trusted clients can make requests of Solr's replication handler.
Credit: Matei “Mal” Badanoiu