Solr's Kerberos plugin can be configured to use delegation tokens, which allows an application to reuse the authentication of an end-user or another application. There are two issues with this functionality (when using SecurityAwareZkACLProvider type of ACL provider e.g. SaslZkACLProvider). Firstly, access to the security configuration can be leaked to users other than the solr super user. Secondly, malicious users can exploit this leaked configuration for privilege escalation to further expose/modify private data and/or disrupt operations in the Solr cluster. The vulnerability is fixed from Solr 6.6.1 onwards.
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2017-9803 from the MITRE CVE dictionary dictionary and NIST NVD.
This issue did not affect the versions of Apache Solr as shipped with in Red Hat products.
NOTE: The following CVSS v3 metrics and score provided are preliminary and subject to review.
| CVSS3 Base Score | 8.1 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
| Attack Vector | Network |
| Attack Complexity | High |
| Privileges Required | None |
| User Interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity Impact | High |
| Availability Impact | High |
| Platform | Package | State |
|---|---|---|
| Red Hat JBoss Portal Platform 6 | solr-core | Not affected |
| Red Hat JBoss Fuse Service Works 6 | solr-core | Not affected |
| Red Hat JBoss Fuse 6 | camel | Not affected |
| Red Hat JBoss EAP 6 | solr-core | Not affected |
| Red Hat JBoss Data Virtualization 6 | solr-core | Not affected |
| Red Hat JBoss Data Grid 6 | solr-core | Not affected |
Vulmon