CVE-2018-8010: Solr core There Is A XML External Vulnerability

MODERATE
Advisory Identifier: GHSA-rc9v-h28f-jcmf
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CVSS 5.5
CWE-611
Published
Advisory Summary

CVE-2018-8010 is a MODERATE (CVSS 5.5) there is a xml external vulnerability (CWE-611: Improper Restriction of XML External Entity Reference) affecting Solr core libraries in the Maven ecosystem. The issue involves there is a xml external entity expansion (xxe) vulnerability in apache solr config files. Remediation is available by upgrading affected packages to version 6.6.4, 7.3.1.

CVE-2018-8010 at a Glance

CVE Identifier CVE-2018-8010
GHSA Identifier GHSA-rc9v-h28f-jcmf
Severity MODERATE
CVSS v3.1 Base Score 5.5
CWE Classification CWE-611: Improper Restriction of XML External Entity Reference
Affected Product Solr core
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 5.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N).

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

How to Fix CVE-2018-8010

To remediate this vulnerability, upgrade all affected Solr core 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: 6.6.4 
<dependency>
    <groupId>org.apache.solr</groupId>
    <artifactId>solr-core</artifactId>
    <version>6.6.4</version>
</dependency>
org.apache.solr:solr-core fixed: 7.3.1 
<dependency>
    <groupId>org.apache.solr</groupId>
    <artifactId>solr-core</artifactId>
    <version>7.3.1</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-2018-8010, 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 Solr core in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 6.6.4), 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-611: Improper Restriction of XML External Entity Reference, where the product processes an xml document that can contain xml entities with uris that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output. In Solr core, 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

This vulnerability in Apache Solr 6.0.0 to 6.6.3, 7.0.0 to 7.3.0 relates to an XML external entity expansion (XXE) in Solr config files (solrconfig.xml, schema.xml, managed-schema). In addition, Xinclude functionality provided in these config files is also affected in a similar way. The vulnerability can be used as XXE using file/ftp/http protocols in order to read arbitrary local files from the Solr server or the internal network. Users are advised to upgrade to either Solr 6.6.4 or Solr 7.3.1 releases both of which address the vulnerability. Once upgrade is complete, no other steps are required. Those releases only allow external entities and Xincludes that refer to local files / zookeeper resources below the Solr instance directory (using Solr's ResourceLoader); usage of absolute URLs is denied. Keep in mind, that external entities and XInclude are explicitly supported to better structure config files in large installations. Before Solr 6 this was no problem, as config files were not accessible through the APIs.

CVE-2018-8010 Affected Solr core Versions

2 component(s)
Fixed Versions:
6.6.47.3.1
Product / Package Ecosystem Affected Versions Fixed Version
org.apache.solr:solr-core
maven/org.apache.solr/solr-core
Maven
≥ 6.6.0
< 6.6.4
6.6.4
org.apache.solr:solr-core
maven/org.apache.solr/solr-core
Maven
≥ 7.0.0
< 7.3.1
7.3.1

References

NVD — CVE-2018-8010 NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-8010
Security Fix Commit FIX COMMIT
https://github.com/apache/lucene-solr/commit/4ba409e0ff3dc38aad88f7b7ad69a76325272b8
Security Fix Commit FIX COMMIT
https://github.com/apache/lucene-solr/commit/6c4e45e28494d4d4d04fb89852d18c86fa3d5f8
Security Fix Commit FIX COMMIT
https://github.com/apache/lucene-solr/commit/6d082d5743dee7e08a86b3f2ef03bc025112512
Security Fix Commit FIX COMMIT
https://github.com/apache/lucene-solr/commit/96f079b4b47eaadff65c7aaf0e5bafe68e30ec3
GitHub Advisory / Wiki ADVISORY
https://github.com/advisories/GHSA-rc9v-h28f-jcmf
issues.apache.org/jira/browse/solr-12... WEB
https://issues.apache.org/jira/browse/SOLR-12316
lists.apache.org/thread.html/r204ba2... WEB
https://lists.apache.org/thread.html/r204ba2a9ea750f38d789d2bb429cc0925ad6133deea7cbc3001d96b5@%3Csolr-user.lucene.apache.org%3E
mail-archives.apache.org/mod_mbox/www-announ... WEB
https://mail-archives.apache.org/mod_mbox/www-announce/201805.mbox/%3C08a801d3f0f9%24df46d300%249dd47900%24%40apache.org%3E
Solr core Security Information SECURITY
http://www.securityfocus.com/bid/104239

Frequently Asked Questions

What is CVE-2018-8010?
CVE-2018-8010 is a security vulnerability in Solr core involving There is a XML external entity expansion (XXE) vulnerability in Apache Solr config files under CWE-611: Improper Restriction of XML External Entity Reference.
Which Solr core versions are affected?
Affected versions include releases prior to 6.6.4, 7.3.1 across affected packages: org.apache.solr:solr-core.
What version fixes CVE-2018-8010?
Upgrading to 6.6.4, 7.3.1 (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 6.6.4, 7.3.1. Upgrade your dependency to 6.6.4, 7.3.1 or later.
What is the CVSS score of CVE-2018-8010?
CVE-2018-8010 has a CVSS v3.1 base score of 5.5 (MODERATE) with vector string CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
What CWE is associated with CVE-2018-8010?
CVE-2018-8010 is classified under CWE-611: Improper Restriction of XML External Entity Reference (The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output.).
How can I check Maven dependencies for CVE-2018-8010?
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-rc9v-h28f-jcmf",
  "modified" : "2024-03-04T22:58:14Z",
  "published" : "2018-10-17T19:56:04Z",
  "aliases" : [ "CVE-2018-8010" ],
  "summary" : "There is a XML external entity expansion (XXE) vulnerability in Apache Solr  config files",
  "details" : "This vulnerability in Apache Solr 6.0.0 to 6.6.3, 7.0.0 to 7.3.0 relates to an XML external entity expansion (XXE) in Solr config files (solrconfig.xml, schema.xml, managed-schema). In addition, Xinclude functionality provided in these config files is also affected in a similar way. The vulnerability can be used as XXE using file/ftp/http protocols in order to read arbitrary local files from the Solr server or the internal network. Users are advised to upgrade to either Solr 6.6.4 or Solr 7.3.1 releases both of which address the vulnerability. Once upgrade is complete, no other steps are required. Those releases only allow external entities and Xincludes that refer to local files / zookeeper resources below the Solr instance directory (using Solr's ResourceLoader); usage of absolute URLs is denied. Keep in mind, that external entities and XInclude are explicitly supported to better structure config files in large installations. Before Solr 6 this was no problem, as config files were not accessible through the APIs.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.apache.solr:solr-core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "6.6.0"
      }, {
        "fixed" : "6.6.4"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.apache.solr:solr-core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "7.0.0"
      }, {
        "fixed" : "7.3.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2018-8010"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/apache/lucene-solr/commit/4ba409e0ff3dc38aad88f7b7ad69a76325272b8"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/apache/lucene-solr/commit/6c4e45e28494d4d4d04fb89852d18c86fa3d5f8"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/apache/lucene-solr/commit/6d082d5743dee7e08a86b3f2ef03bc025112512"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/apache/lucene-solr/commit/96f079b4b47eaadff65c7aaf0e5bafe68e30ec3"
  }, {
    "type" : "ADVISORY",
    "url" : "https://github.com/advisories/GHSA-rc9v-h28f-jcmf"
  }, {
    "type" : "WEB",
    "url" : "https://issues.apache.org/jira/browse/SOLR-12316"
  }, {
    "type" : "WEB",
    "url" : "https://lists.apache.org/thread.html/r204ba2a9ea750f38d789d2bb429cc0925ad6133deea7cbc3001d96b5@%3Csolr-user.lucene.apache.org%3E"
  }, {
    "type" : "WEB",
    "url" : "https://mail-archives.apache.org/mod_mbox/www-announce/201805.mbox/%3C08a801d3f0f9%24df46d300%249dd47900%24%40apache.org%3E"
  }, {
    "type" : "WEB",
    "url" : "http://www.securityfocus.com/bid/104239"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-611" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-06-16T21:54:20Z",
    "nvd_published_at" : null
  }
}