Bug 2263583 (CVE-2023-50298) - CVE-2023-50298 solr: possible exposure of ZooKeeper credentials via Streaming Expressions
Summary: CVE-2023-50298 solr: possible exposure of ZooKeeper credentials via Streaming...
Keywords:
Status: NEW
Alias: CVE-2023-50298
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
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Blocks: 2263574
TreeView+ depends on / blocked
 
Reported: 2024-02-09 22:13 UTC by Robb Gatica
Modified: 2024-05-08 21:30 UTC (History)
29 users (show)

Fixed In Version: solr 8.11.3, solr 9.4.1
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Doc Text:
A flaw was found in Apache Solr. Streaming Expressions allow users to extract data from other Solr Clouds using a "zkHost" parameter. When the original SolrCloud is set up to use ZooKeeper credentials and ACLs, they will be sent to whichever "zkHost" the user provides. An attacker could set up a server to impersonate ZooKeeper that accepts ZooKeeper requests with credentials and ACLs and extract sensitive information, then send a streaming expression using the malicious server's address in "zkHost". Streaming Expressions are exposed via the "/streaming" handler with "read" permissions.
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Description Robb Gatica 2024-02-09 22:13:41 UTC 
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.

References:
http://www.openwall.com/lists/oss-security/2024/02/09/2
http://www.openwall.com/lists/oss-security/2024/02/09/3
https://solr.apache.org/security.html#cve-2023-50298-apache-solr-can-expose-zookeeper-credentials-via-streaming-expressions
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