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CVE-2017-9803

7.5 · HIGH

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.

Published Sep 18, 2017CWE-287EPSS 2.19%

Overview

CVE-2017-9803 is a high-severity vulnerability. It was published on September 18, 2017 and has a CVSS 3.0 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.0 base score of 7.5, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refmail-archives.us.apache.org/mod_mbox/www-announce/201709.mbox/%3CCAOOKt53AOScg04zUh0%2BR_fcXD0C9s5mQ-OzdgYdnHz49u1KmXw%40mail.gmail.com%3ERefwww.securityfocus.com/bid/100870Refmail-archives.us.apache.org/mod_mbox/www-announce/201709.mbox/%3CCAOOKt53AOScg04zUh0%2BR_fcXD0C9s5mQ-OzdgYdnHz49u1KmXw%40mail.gmail.com%3ERefwww.securityfocus.com/bid/100870

How CyberStrike helps

Frequently asked questions

What is CVE-2017-9803?

CVE-2017-9803 is a high-severity vulnerability. It was published on September 18, 2017 and has a CVSS 3.0 base score of 7.5 (HIGH).

How severe is CVE-2017-9803?

This vulnerability has a CVSS 3.0 base score of 7.5, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2017-9803?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2017-9803?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2017-9803 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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