CVE-2018-20028: Contao/contao Contao Information Disclosure Vulnerability

MODERATE
Advisory Identifier: GHSA-q99w-j4mj-7hj8
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CVSS 6.5
CWE-284
Published
Advisory Summary

CVE-2018-20028 is a MODERATE (CVSS 6.5) contao information disclosure vulnerability (CWE-284: Improper Access Control) affecting Contao/contao libraries in the Packagist ecosystem. The issue involves contao information disclosure via access control flaws. Remediation is available by upgrading affected packages to version 3.5.37, 4.6.11, 4.4.31.

CVE-2018-20028 at a Glance

CVE Identifier CVE-2018-20028
GHSA Identifier GHSA-q99w-j4mj-7hj8
Severity MODERATE
CVSS v3.1 Base Score 6.5
CWE Classification CWE-284: Improper Access Control
Affected Product Contao/contao
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 6.5

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

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 None (I:N)
Availability None (A:N)

How to Fix CVE-2018-20028

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

contao/contao fixed: 3.5.37 
Upgrade contao/contao to 3.5.37
contao/contao fixed: 4.6.11 
Upgrade contao/contao to 4.6.11
contao/contao fixed: 4.4.31 
Upgrade contao/contao to 4.4.31
Verify Direct and Transitive Dependencies

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

inspect dependencies for contao/contao

How to Check if You Are Affected

To determine whether your application is affected by CVE-2018-20028, inspect your project dependencies for Contao/contao:

inspect dependencies for contao/contao

Analyze the terminal output to locate any version of Contao/contao in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.5.37), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-284: Improper Access Control, where the product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. In Contao/contao, 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

Contao 3.x before 3.5.37, 4.4.x before 4.4.31 and 4.6.x before 4.6.11 has Incorrect Access Control.

CVE-2018-20028 Affected Contao/contao Versions

3 component(s)
Fixed Versions:
3.5.374.6.114.4.31
Product / Package Ecosystem Affected Versions Fixed Version
contao/contao
 Packagist
≥ 3.0.0
< 3.5.37
3.5.37
contao/contao
 Packagist
≥ 4.6.0
< 4.6.11
4.6.11
contao/contao
 Packagist
≥ 4.4.0
< 4.4.31
4.4.31

References

NVD — CVE-2018-20028 NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-20028
Security Fix Commit FIX COMMIT
https://github.com/contao/contao/commit/bbe5fe1d385cd1195670e2d6b972272133443c59
Contao/contao Security Information SECURITY
https://contao.org/en/news/security-vulnerability-cve-2018-20028.html

Frequently Asked Questions

What is CVE-2018-20028?
CVE-2018-20028 is a security vulnerability in Contao/contao involving Contao Information Disclosure via Access Control Flaws under CWE-284: Improper Access Control.
Which Contao/contao versions are affected?
Affected versions include releases prior to 3.5.37, 4.6.11, 4.4.31 across affected packages: contao/contao.
What version fixes CVE-2018-20028?
Upgrading to 3.5.37, 4.6.11, 4.4.31 (or the latest patched release for your respective branch) resolves the vulnerability.
Is contao/contao affected?
Yes, contao/contao is affected in releases prior to 3.5.37, 4.6.11, 4.4.31. Upgrade your dependency to 3.5.37, 4.6.11, 4.4.31 or later.
What is the CVSS score of CVE-2018-20028?
CVE-2018-20028 has a CVSS v3.1 base score of 6.5 (MODERATE) with vector string CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
What CWE is associated with CVE-2018-20028?
CVE-2018-20028 is classified under CWE-284: Improper Access Control (The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.).
How can I check Packagist dependencies for CVE-2018-20028?
Run the dependency tree command: 'inspect dependencies for contao/contao'. 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-q99w-j4mj-7hj8",
  "modified" : "2024-04-25T23:05:02Z",
  "published" : "2022-05-13T01:19:51Z",
  "aliases" : [ "CVE-2018-20028" ],
  "summary" : "Contao Information Disclosure via Access Control Flaws",
  "details" : "Contao 3.x before 3.5.37, 4.4.x before 4.4.31 and 4.6.x before 4.6.11 has Incorrect Access Control.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "contao/contao"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "3.0.0"
      }, {
        "fixed" : "3.5.37"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "contao/contao"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.6.0"
      }, {
        "fixed" : "4.6.11"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "contao/contao"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.4.0"
      }, {
        "fixed" : "4.4.31"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2018-20028"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/contao/contao/commit/bbe5fe1d385cd1195670e2d6b972272133443c59"
  }, {
    "type" : "WEB",
    "url" : "https://contao.org/en/news/security-vulnerability-cve-2018-20028.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-284" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-04-25T23:05:02Z",
    "nvd_published_at" : "2019-04-17T19:29:00Z"
  }
}