CVE-2017-9803 Apache Solr Kerberos delegation token functionality flaws

What is CVE-2017-9803?

CVE-2017-9803 is a high-severity vulnerability in Apache Solr, published on 18 Sep 2017. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Apache 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 Apache Solr 6.6.1 onwards.

Weakness: CWE-287

Which versions are affected by CVE-2017-9803?

2 open source packages ship an affected version, including org.apache.solr:solr-core. It affects 1 product.

Products include Apache Solr.

How do I fix CVE-2017-9803?

Upgrade org.apache.solr:solr-core to 6.6.1 or later.

Is CVE-2017-9803 being exploited?

There is no known exploitation of CVE-2017-9803 in the wild and no public exploit code.

Other vulnerabilities in Apache Solr

• CVE-2019-17558 Apache Solr VelocityResponseWriter Plug-In Remote Code Execution Exploited High 7.5
• CVE-2019-0193 Apache Solr DataImportHandler Code Injection Exploited High 7.2
• CVE-2024-45216 Apache Solr: Authentication bypass possible using a fake URL Path ending Critical 9.8
• CVE-2021-44548 Apache Solr information disclosure vulnerability through DataImportHandler Critical 9.8
• CVE-2021-27905 SSRF vulnerability with the Replication handler Critical 9.8

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-f553-j2gv-g5r9.