CVE-2023-50386: Apache Solr Backup/Restore APIs Allow For Deployment Vulnerability

HIGH
Advisory Identifier: GHSA-37vr-vmg4-jwpw
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CVSS 8.8
CWE-434
Published
Advisory Summary

CVE-2023-50386 is a HIGH (CVSS 8.8) backup/restore apis allow for deployment vulnerability (CWE-434: Unrestricted Upload of File with Dangerous Type) affecting Apache Solr libraries in the Maven ecosystem. The issue involves backup/restore apis allow for deployment of executables in malicious configsets. Remediation is available by upgrading affected packages to version 8.11.3, 9.4.1.

CVE-2023-50386 at a Glance

CVE Identifier CVE-2023-50386
GHSA Identifier GHSA-37vr-vmg4-jwpw
Severity HIGH
CVSS v3.1 Base Score 8.8
CWE Classification CWE-434: Unrestricted Upload of File with Dangerous Type
Affected Product Apache Solr
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 8.8

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2023-50386

To remediate this vulnerability, upgrade all affected Apache Solr dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

org.apache.solr:solr-core fixed: 8.11.3 
<dependency>
    <groupId>org.apache.solr</groupId>
    <artifactId>solr-core</artifactId>
    <version>8.11.3</version>
</dependency>
org.apache.solr:solr-core fixed: 9.4.1 
<dependency>
    <groupId>org.apache.solr</groupId>
    <artifactId>solr-core</artifactId>
    <version>9.4.1</version>
</dependency>
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree -Dincludes=org.apache.solr

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2023-50386, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=org.apache.solr

Analyze the terminal output to locate any version of Apache Solr in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 8.11.3), your application is affected.

Note: The mvn dependency:tree -Dincludes=org.apache.solr command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-434: Unrestricted Upload of File with Dangerous Type, where the product allows the upload or transfer of dangerous file types that are automatically processed within its environment. In Apache Solr, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

Improper Control of Dynamically-Managed Code Resources, Unrestricted Upload of File with Dangerous Type, Inclusion of Functionality from Untrusted Control Sphere 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. In the affected versions, Solr ConfigSets accepted Java jar and class files to be uploaded through the ConfigSets API. When backing up Solr Collections, these configSet files would be saved to disk when using the LocalFileSystemRepository (the default for backups). If the backup was saved to a directory that Solr uses in its ClassPath/ClassLoaders, then the jar and class files would be available to use with any ConfigSet, trusted or untrusted. When Solr is run in a secure way (Authorization enabled), as is strongly suggested, this vulnerability is limited to extending the Backup permissions with the ability to add libraries. Users are recommended to upgrade to version 8.11.3 or 9.4.1, which fix the issue. In these versions, the following protections have been added: * Users are no longer able to upload files to a configSet that could be executed via a Java ClassLoader. * The Backup API restricts saving backups to directories that are used in the ClassLoader.

CVE-2023-50386 Affected Apache Solr Versions

2 component(s)
Fixed Versions:
8.11.39.4.1
Product / Package Ecosystem Affected Versions Fixed Version
org.apache.solr:solr-core
maven/org.apache.solr/solr-core
Maven
≥ 6.0.0
< 8.11.3
8.11.3
org.apache.solr:solr-core
maven/org.apache.solr/solr-core
Maven
≥ 9.0.0
< 9.4.1
9.4.1

References

NVD — CVE-2023-50386 NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-50386
Security Fix Commit FIX COMMIT
https://github.com/apache/lucene-solr/commit/6c8f24eb9e3fe1cb19058173f2e221de3febfeda
Security Fix Commit FIX COMMIT
https://github.com/apache/lucene-solr/commit/7e9a2e67f812032a049836c3aa0b18bf5cd717f9
Security Fix Commit FIX COMMIT
https://github.com/apache/solr/commit/644dd3a6d6780d71030f7070754d2f3adce22859
Security Fix Commit FIX COMMIT
https://github.com/apache/solr/commit/c79011e81dada2f9bc4b4df32ffb32152ef81152
issues.apache.org/jira/browse/solr-16... WEB
https://issues.apache.org/jira/browse/SOLR-16949
Apache Solr Security Information SECURITY
https://solr.apache.org/security.html#cve-2023-50386-apache-solr-backuprestore-apis-allow-for-deployment-of-executables-in-malicious-configsets
Apache Solr Security Information SECURITY
http://www.openwall.com/lists/oss-security/2024/02/09/1

Frequently Asked Questions

What is CVE-2023-50386?
CVE-2023-50386 is a security vulnerability in Apache Solr involving Backup/Restore APIs allow for deployment of executables in malicious ConfigSets under CWE-434: Unrestricted Upload of File with Dangerous Type.
Which Apache Solr versions are affected?
Affected versions include releases prior to 8.11.3, 9.4.1 across affected packages: org.apache.solr:solr-core.
What version fixes CVE-2023-50386?
Upgrading to 8.11.3, 9.4.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is solr-core affected?
Yes, org.apache.solr:solr-core is affected in releases prior to 8.11.3, 9.4.1. Upgrade your dependency to 8.11.3, 9.4.1 or later.
What is the CVSS score of CVE-2023-50386?
CVE-2023-50386 has a CVSS v3.1 base score of 8.8 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2023-50386?
CVE-2023-50386 is classified under CWE-434: Unrestricted Upload of File with Dangerous Type (The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.).
How can I check Maven dependencies for CVE-2023-50386?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.apache.solr'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-37vr-vmg4-jwpw",
  "modified" : "2025-02-13T19:14:52Z",
  "published" : "2024-02-09T18:31:07Z",
  "aliases" : [ "CVE-2023-50386" ],
  "summary" : "Apache Solr: Backup/Restore APIs allow for  deployment of executables in malicious ConfigSets ",
  "details" : "Improper Control of Dynamically-Managed Code Resources, Unrestricted Upload of File with Dangerous Type, Inclusion of Functionality from Untrusted Control Sphere 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.\n\nIn the affected versions, Solr ConfigSets accepted Java jar and class files to be uploaded through the ConfigSets API.\nWhen backing up Solr Collections, these configSet files would be saved to disk when using the LocalFileSystemRepository (the default for backups).\nIf the backup was saved to a directory that Solr uses in its ClassPath/ClassLoaders, then the jar and class files would be available to use with any ConfigSet, trusted or untrusted.\n\nWhen Solr is run in a secure way (Authorization enabled), as is strongly suggested, this vulnerability is limited to extending the Backup permissions with the ability to add libraries.\nUsers are recommended to upgrade to version 8.11.3 or 9.4.1, which fix the issue.\nIn these versions, the following protections have been added:\n\n  *  Users are no longer able to upload files to a configSet that could be executed via a Java ClassLoader.\n  *  The Backup API restricts saving backups to directories that are used in the ClassLoader.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.apache.solr:solr-core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "6.0.0"
      }, {
        "fixed" : "8.11.3"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.apache.solr:solr-core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "9.0.0"
      }, {
        "fixed" : "9.4.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-50386"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/apache/lucene-solr/commit/6c8f24eb9e3fe1cb19058173f2e221de3febfeda"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/apache/lucene-solr/commit/7e9a2e67f812032a049836c3aa0b18bf5cd717f9"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/apache/solr/commit/644dd3a6d6780d71030f7070754d2f3adce22859"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/apache/solr/commit/c79011e81dada2f9bc4b4df32ffb32152ef81152"
  }, {
    "type" : "WEB",
    "url" : "https://issues.apache.org/jira/browse/SOLR-16949"
  }, {
    "type" : "WEB",
    "url" : "https://solr.apache.org/security.html#cve-2023-50386-apache-solr-backuprestore-apis-allow-for-deployment-of-executables-in-malicious-configsets"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2024/02/09/1"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-434" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-02-09T21:53:13Z",
    "nvd_published_at" : "2024-02-09T18:15:08Z"
  }
}