CVE-2023-50291: Apache Solr: System Property redaction logic inconsistency can lead to leaked passwords

[Houston Putman <houston () apache org>]

Severity: moderate

Affected versions:

- Apache Solr 6.0.0 through 8.11.2
- Apache Solr 9.0.0 before 9.3.0

Description:

Insufficiently Protected Credentials vulnerability in Apache Solr.

This issue affects Apache Solr: from 6.0.0 through 8.11.2, from 9.0.0 before 9.3.0.
One of the two endpoints that publishes the Solr process' Java system properties, /admin/info/properties, was only 
setup to hide system properties that had "password" contained in the name.
There are a number of sensitive system properties, such as "basicauth" and "aws.secretKey" do not contain "password", 
thus their values were published via the "/admin/info/properties" endpoint.
This endpoint populates the list of System Properties on the home screen of the Solr Admin page, making the exposed 
credentials visible in the UI.

This /admin/info/properties endpoint is protected under the "config-read" permission.
Therefore, Solr Clouds with Authorization enabled will only be vulnerable through logged-in users that have the 
"config-read" permission.
Users are recommended to upgrade to version 9.3.0 or 8.11.3, which fixes the issue.
A single option now controls hiding Java system property for all endpoints, "-Dsolr.hiddenSysProps".
By default all known sensitive properties are hidden (including "-Dbasicauth"), as well as any property with a name 
containing "secret" or "password".

Users who cannot upgrade can also use the following Java system property to fix the issue:
  '-Dsolr.redaction.system.pattern=.*(password|secret|basicauth).*'

This issue is being tracked as SOLR-16809 

Credit:

Michael Taggart (reporter)

References:

https://solr.apache.org/security.html#cve-2023-50291-apache-solr-can-leak-certain-passwords-due-to-system-property-redaction-logic-inconsistencies
https://solr.apache.org
https://www.cve.org/CVERecord?id=CVE-2023-50291
https://issues.apache.org/jira/browse/SOLR-16809