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).
{ "nvd_published_at": "2019-12-30T17:15:00Z", "cwe_ids": [ "CWE-20", "CWE-74", "CWE-94" ], "severity": "HIGH", "github_reviewed": true, "github_reviewed_at": "2020-02-11T19:43:12Z" }