Vulnerabilities in pkg:maven/org.exist-db/exist-core

PACKAGE
Advisory Identifier: GHSA-jxm5-5xcw-h57q
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Advisory Summary

CVE-2018-1000823 is a CRITICAL (CVSS 10.0) exist-core xml external entity (xxe) vulnerability (CWE-611: Improper Restriction of XML External Entity Reference) affecting exist-db libraries in the Maven ecosystem. The issue involves exist-core xml external entity (xxe) vulnerability. Remediation is available by upgrading affected packages to version 5.1.0.

1 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:maven/org.exist-db/exist-core

1 Known Advisory Record(s)

Vulnerability advisories affecting package pkg:maven/org.exist-db/exist-core. Select an advisory below to view technical details or fixes.

Advisory ID CVE / NVD Severity Summary
GHSA-jxm5-5xcw-h57q CVE-2018-1000823 CRITICAL exist-db:exist-core XML External Entity (XXE) vulnerability

CVE-2018-1000823 at a Glance

CVE Identifier CVE-2018-1000823
GHSA Identifier GHSA-jxm5-5xcw-h57q
Severity CRITICAL
CVSS v3.1 Base Score 10.0
CWE Classification CWE-611: Improper Restriction of XML External Entity Reference
Affected Product exist-db
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 10.0

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

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

How to Fix CVE-2018-1000823

To remediate this vulnerability, upgrade all affected exist-db 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.exist-db:exist-core fixed: 5.1.0 
<dependency>
    <groupId>org.exist-db</groupId>
    <artifactId>exist-core</artifactId>
    <version>5.1.0</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.exist-db

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2018-1000823, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=org.exist-db

Analyze the terminal output to locate any version of exist-db in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 5.1.0), your application is affected.

Note: The mvn dependency:tree -Dincludes=org.exist-db 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 exist-db, 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

exist version <= 5.0.0-RC4 contains a XML External Entity (XXE) vulnerability in XML Parser for REST Server that can result in Disclosure of confidential data, denial of service, SSRF, port scanning.

CVE-2018-1000823 Affected exist-db Versions

1 component(s)
Fixed Versions:
5.1.0
Product / Package Ecosystem Affected Versions Fixed Version
org.exist-db:exist-core
maven/org.exist-db/exist-core
Maven
< 5.1.0
5.1.0

References

NVD — CVE-2018-1000823 NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-1000823
exist-db Source Repository REPOSITORY
https://github.com/eXist-db/exist/issues/2180
exist-db Source Repository REPOSITORY
https://github.com/eXist-db/exist/pull/2243
exist-db Source Repository REPOSITORY
https://github.com/eXist-db/exist/pull/2247
Security Fix Commit FIX COMMIT
https://github.com/eXist-db/exist/commit/1c3f0aec14d00bdbca175713af70cb7c7b868e9f
Security Fix Commit FIX COMMIT
https://github.com/eXist-db/exist/commit/b210f9fbf379b68842f2b055dda80d7e7479e96f
0dd.zone/2018/10/27/exist-xx... WEB
https://0dd.zone/2018/10/27/exist-XXE
GitHub Advisory / Wiki ADVISORY
https://github.com/advisories/GHSA-jxm5-5xcw-h57q
exist-db Source Repository REPOSITORY
https://github.com/eXist-db/exist

Frequently Asked Questions

What is CVE-2018-1000823?
CVE-2018-1000823 is a security vulnerability in exist-db involving exist-core XML External Entity (XXE) vulnerability under CWE-611: Improper Restriction of XML External Entity Reference.
Which exist-db versions are affected?
Affected versions include releases prior to 5.1.0 across affected packages: org.exist-db:exist-core.
What version fixes CVE-2018-1000823?
Upgrading to 5.1.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is exist-core affected?
Yes, org.exist-db:exist-core is affected in releases prior to 5.1.0. Upgrade your dependency to 5.1.0 or later.
What is the CVSS score of CVE-2018-1000823?
CVE-2018-1000823 has a CVSS v3.1 base score of 10.0 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.
What CWE is associated with CVE-2018-1000823?
CVE-2018-1000823 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-2018-1000823?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.exist-db'. 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-jxm5-5xcw-h57q",
  "modified" : "2022-11-15T16:07:28Z",
  "published" : "2018-12-20T22:02:17Z",
  "aliases" : [ "CVE-2018-1000823" ],
  "summary" : "exist-db:exist-core XML External Entity (XXE) vulnerability",
  "details" : "exist version <= 5.0.0-RC4 contains a XML External Entity (XXE) vulnerability in XML Parser for REST Server that can result in Disclosure of confidential data, denial of service, SSRF, port scanning.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.exist-db:exist-core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "5.1.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2018-1000823"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/eXist-db/exist/issues/2180"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/eXist-db/exist/pull/2243"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/eXist-db/exist/pull/2247"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/eXist-db/exist/commit/1c3f0aec14d00bdbca175713af70cb7c7b868e9f"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/eXist-db/exist/commit/b210f9fbf379b68842f2b055dda80d7e7479e96f"
  }, {
    "type" : "WEB",
    "url" : "https://0dd.zone/2018/10/27/exist-XXE"
  }, {
    "type" : "ADVISORY",
    "url" : "https://github.com/advisories/GHSA-jxm5-5xcw-h57q"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/eXist-db/exist"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-611" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-06-16T21:44:26Z",
    "nvd_published_at" : null
  }
}