Package Instance

Unrestricted upload of file with dangerous type in Apache Solr
The 8.1.1 and 8.2.0 releases of Apache Solr contain an insecure setting for the ENABLE_REMOTE_JMX_OPTS configuration option in the default solr.in.sh configuration file shipping with Solr. If you use the default solr.in.sh file from the affected releases, then JMX monitoring will be enabled and exposed on RMI_PORT (default=18983), without any authentication. If this port is opened for inbound traffic in your firewall, then anyone with network access to your Solr nodes will be able to access JMX, which may in turn allow them to upload malicious code for execution on the Solr server.

Apache Solr: Unauthorized bypass of certain "predefined permission" rules in the RuleBasedAuthorizationPlugin
Deployments of Apache Solr 5.3.0 through 9.10.0 that rely on Solr's "Rule Based Authorization Plugin" are vulnerable to allowing unauthorized access to certain Solr APIs, due to insufficiently strict input validation in those components.  Only deployments that meet all of the following criteria are impacted by this vulnerability:

  *  Use of Solr's "RuleBasedAuthorizationPlugin"
  *  A RuleBasedAuthorizationPlugin config (see security.json) that specifies multiple "roles"
  *  A RuleBasedAuthorizationPlugin permission list (see security.json) that uses one or more of the following pre-defined permission rules: "config-read", "config-edit", "schema-read", "metrics-read", or "security-read".
  *  A RuleBasedAuthorizationPlugin permission list that doesn't define the "all" pre-defined permission
  *  A networking setup that allows clients to make unfiltered network requests to Solr. (i.e. user-submitted HTTP/HTTPS requests reach Solr as-is, unmodified or restricted by any intervening proxy or gateway)

Users can mitigate this vulnerability by ensuring that their RuleBasedAuthorizationPlugin configuration specifies the "all" pre-defined permission and associates the permission with an "admin" or other privileged role.  Users can also upgrade to a Solr version outside of the impacted range, such as the recently released Solr 9.10.1.

Incorrect Authorization in Apache Solr
When using ConfigurableInternodeAuthHadoopPlugin for authentication, Apache Solr versions prior to 8.8.2 would forward/proxy distributed requests using server credentials instead of original client credentials. This would result in incorrect authorization resolution on the receiving hosts.

Apache Solr: Insufficient file-access checking in standalone core-creation requests
The "create core" API of Apache Solr 8.6 through 9.10.0 lacks sufficient input validation on some API parameters, which can cause Solr to check the existence of and attempt to read file-system paths that should be disallowed by Solr's  "allowPaths" security setting https://https://solr.apache.org/guide/solr/latest/configuration-guide/configuring-solr-xml.html#the-solr-element .  These read-only accesses can allow users to create cores using unexpected configsets if any are accessible via the filesystem.  On Windows systems configured to allow UNC paths this can additionally cause disclosure of NTLM "user" hashes. 

Solr deployments are subject to this vulnerability if they meet the following criteria:
  *  Solr is running in its "standalone" mode.
  *  Solr's "allowPath" setting is being used to restrict file access to certain directories.
  *  Solr's "create core" API is exposed and accessible to untrusted users.  This can happen if Solr's  RuleBasedAuthorizationPlugin https://solr.apache.org/guide/solr/latest/deployment-guide/rule-based-authorization-plugin.html  is disabled, or if it is enabled but the "core-admin-edit" predefined permission (or an equivalent custom permission) is given to low-trust (i.e. non-admin) user roles.

Users can mitigate this by enabling Solr's RuleBasedAuthorizationPlugin (if disabled) and configuring a permission-list that prevents untrusted users from creating new Solr cores.  Users should also upgrade to Apache Solr 9.10.1 or greater, which contain fixes for this issue.

Improper Neutralization of Input During Web Page Generation in Apache Solr
Cross-site scripting (XSS) vulnerability in the Admin UI Plugin / Stats page in Apache Solr 4.x before 4.10.3 allows remote attackers to inject arbitrary web script or HTML via the fieldvaluecache object.

Improper Input Validation
Reported in SOLR-14515 (private) and fixed in SOLR-14561 (public), released in Solr version 8.6.0. The Replication handler 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.

Improper Neutralization of Input During Web Page Generation in Apache Solr
Multiple cross-site scripting (XSS) vulnerabilities in the Admin UI in Apache Solr before 5.1 allow remote attackers to inject arbitrary web script or HTML via crafted fields that are mishandled during the rendering of the (1) Analysis page, related to webapp/web/js/scripts/analysis.js or (2) Schema-Browser page, related to webapp/web/js/scripts/schema-browser.js.

Incorrect Authorization in Apache Solr
Apache Solr versions 6.6.0 to 6.6.6, 7.0.0 to 7.7.3 and 8.0.0 to 8.6.2 prevents some features considered dangerous (which could be used for remote code execution) to be configured in a ConfigSet that's uploaded via API without authentication/authorization. The checks in place to prevent such features can be circumvented by using a combination of UPLOAD/CREATE actions. This issue is patched in 8.6.3.