CVE-2019-17558

Summary:

Apache Solr 5.0.0 to Apache Solr 8.3.1 are vulnerable to a Remote Code Execution through the VelocityResponseWriter. A Velocity template can be provided through Velocity templates in a configset `velocity/` directory or as a parameter. A user defined configset could contain renderable, potentially malicious, templates. Parameter provided templates are disabled by default, but can be enabled by setting `params.resource.loader.enabled` by defining a response writer with that setting set to `true`. Defining a response writer requires configuration API access. Solr 8.4 removed the params resource loader entirely, and only enables the configset-provided template rendering when the configset is `trusted` (has been uploaded by an authenticated user).

Reference Links(if available):

https://issues.apache.org/jira/browse/SOLR-13971

https://lists.apache.org/thread.html/rb964fe5c4e3fc05f75e8f74bf6b885f456b7a7750c36e9a8045c627a@%3Cissues.lucene.apache.org%3E

https://lists.apache.org/thread.html/r9271d030452170ba6160c022757e1b5af8a4c9ccf9e04164dec02e7f@%3Cissues.lucene.apache.org%3E

https://lists.apache.org/thread.html/r36e35fd76239a381643555966fb3e72139e018d52d76544fb42f96d8@%3Cissues.lucene.apache.org%3E

https://lists.apache.org/thread.html/ra29fa6ede5184385bf2c63e8ec054990a7d4622bba1d244bee70d82d@%3Cissues.lucene.apache.org%3E

CVSS Score (if available)

v2: / HIGHAV:N/AC:M/Au:S/C:P/I:P/A:P

v3: / HIGHCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Links to Exploits(if available)

https://gist.github.com/s00py/a1ba36a3689fa13759ff910e179fc133/

https://www.huaweicloud.com/en-us/notice/2018/20191104170849387.html

https://www.tenable.com/blog/apache-solr-vulnerable-to-remote-code-execution-zero-day-vulnerability

https://github.com/jas502n/solr_rce

https://github.com/AleWong/Apache-Solr-RCE-via-Velocity-template