CVE-2023-50298: Apache Solr: Solr can expose ZooKeeper credentials via Streaming Expressions
Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Apache Solr. This issue affects Apache Solr from 6.0.0 through 8.11.2, from 9.0.0 before 9.4.1.
Solr Streaming Expressions allows users to extract data from other Solr Clouds, using a "zkHost" parameter.
When original SolrCloud is setup to use ZooKeeper credentials and ACLs, they will be sent to whatever "zkHost" the user provides.
An attacker could setup a server to mock ZooKeeper, that accepts ZooKeeper requests with credentials and ACLs and extracts the sensitive information, then send a streaming expression using the mock server's address in "zkHost".
Streaming Expressions are exposed via the "/streaming" handler, with "read" permissions.
Users are recommended to upgrade to version 8.11.3 or 9.4.1, which fix the issue.
From these versions on, only zkHost values that have the same server address (regardless of chroot), will use the given ZooKeeper credentials and ACLs when connecting.
Other sources
Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Apache Solr.This issue affects Apache Solr: from 6.0.0 through 8.11.2, from 9.0.0 before 9.4.1.
Solr Streaming Expressions allows users to extract data from other Solr Clouds, using a "zkHost" parameter. When original SolrCloud is setup to use ZooKeeper credentials and ACLs, they will be sent to whatever "zkHost" the user provides. An attacker could setup a server to mock ZooKeeper, that accepts ZooKeeper requests with credentials and ACLs and extracts the sensitive information, then send a streaming expression using the mock server's address in "zkHost". Streaming Expressions are exposed via the "/streaming" handler, with "read" permissions.
Users are recommended to upgrade to version 8.11.3 or 9.4.1, which fix the issue. From these versions on, only zkHost values that have the same server address (regardless of chroot), will use the given ZooKeeper credentials and ACLs when connecting.
— MITRE
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
maven/org.apache.solr:solr-solrjto a version that resolves this vulnerability.Fixed in 8.11.3 - Upgrade
Upgrade
maven/org.apache.solr:solr-solrjto a version that resolves this vulnerability.Fixed in 9.4.1 - Upgrade
Upgrade
maven/org.apache.solr:solr-solrj-streamingto a version that resolves this vulnerability.Fixed in 8.11.3 - Upgrade
Upgrade
maven/org.apache.solr:solr-solrj-streamingto a version that resolves this vulnerability.Fixed in 9.4.1
Event History
Frequently Asked Questions
What is the severity of CVE-2023-50298?
CVE-2023-50298 has a high severity level due to the potential exposure of sensitive data.
How do I fix CVE-2023-50298?
To remedy CVE-2023-50298, upgrade Apache Solr to version 8.11.3 or 9.4.1.
What software is affected by CVE-2023-50298?
CVE-2023-50298 affects Apache Solr versions between 6.0.0 and 8.11.3 and 9.0.0 to 9.4.1.
Can CVE-2023-50298 allow data extraction?
Yes, CVE-2023-50298 enables attackers to extract data from other Solr Clouds through Streaming Expressions.
Does CVE-2023-50298 expose Zookeeper credentials?
Yes, CVE-2023-50298 can expose Zookeeper credentials, leading to unauthorized access to sensitive information.