CVE-2018-16974: Elefant/cms Elefant CMS Code Execution Vulnerability Vulnerability

CRITICAL
Advisory Identifier: GHSA-77j2-7whr-6vpx
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CVSS 9.8
CWE-434
Published
Advisory Summary

CVE-2018-16974 is a CRITICAL (CVSS 9.8) elefant cms code execution vulnerability vulnerability (CWE-434: Unrestricted Upload of File with Dangerous Type) affecting Elefant/cms libraries in the Packagist ecosystem. The issue involves elefant cms code execution vulnerability. Remediation is available by upgrading affected packages to version 2.0.7.

CVE-2018-16974 at a Glance

CVE Identifier CVE-2018-16974
GHSA Identifier GHSA-77j2-7whr-6vpx
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-434: Unrestricted Upload of File with Dangerous Type
Affected Product Elefant/cms
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 9.8

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

How to Fix CVE-2018-16974

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

elefant/cms fixed: 2.0.7 
Upgrade elefant/cms to 2.0.7
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 elefant/cms

How to Check if You Are Affected

To determine whether your application is affected by CVE-2018-16974, inspect your project dependencies for Elefant/cms:

inspect dependencies for elefant/cms

Analyze the terminal output to locate any version of Elefant/cms in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.0.7), 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-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 Elefant/cms, 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

An issue was discovered in Elefant CMS before 2.0.7. There is a PHP Code Execution Vulnerability in `apps/filemanager/upload/drop.php` by using `/filemanager/api/rm/.htaccess` to remove the .htaccess file, and then using a filename that ends in .php followed by space characters (for bypassing the blacklist).

CVE-2018-16974 Affected Elefant/cms Versions

1 component(s)
Fixed Versions:
2.0.7
Product / Package Ecosystem Affected Versions Fixed Version
elefant/cms
 Packagist
< 2.0.7
2.0.7

References

NVD — CVE-2018-16974 NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-16974
Elefant/cms Source Repository REPOSITORY
https://github.com/jbroadway/elefant/issues/287
Security Fix Commit FIX COMMIT
https://github.com/jbroadway/elefant/commit/49ba8cc24e9f009ce30d2c2eb9eefeb9be4ce1d0
Elefant/cms Release RELEASE
https://github.com/jbroadway/elefant/releases/tag/elefant_2_0_7_stable

Frequently Asked Questions

What is CVE-2018-16974?
CVE-2018-16974 is a security vulnerability in Elefant/cms involving Elefant CMS Code Execution Vulnerability under CWE-434: Unrestricted Upload of File with Dangerous Type.
Which Elefant/cms versions are affected?
Affected versions include releases prior to 2.0.7 across affected packages: elefant/cms.
What version fixes CVE-2018-16974?
Upgrading to 2.0.7 (or the latest patched release for your respective branch) resolves the vulnerability.
Is elefant/cms affected?
Yes, elefant/cms is affected in releases prior to 2.0.7. Upgrade your dependency to 2.0.7 or later.
What is the CVSS score of CVE-2018-16974?
CVE-2018-16974 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2018-16974?
CVE-2018-16974 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 Packagist dependencies for CVE-2018-16974?
Run the dependency tree command: 'inspect dependencies for elefant/cms'. 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-77j2-7whr-6vpx",
  "modified" : "2023-07-25T19:39:02Z",
  "published" : "2022-05-14T01:57:58Z",
  "aliases" : [ "CVE-2018-16974" ],
  "summary" : "Elefant CMS Code Execution Vulnerability",
  "details" : "An issue was discovered in Elefant CMS before 2.0.7. There is a PHP Code Execution Vulnerability in `apps/filemanager/upload/drop.php` by using `/filemanager/api/rm/.htaccess` to remove the .htaccess file, and then using a filename that ends in .php followed by space characters (for bypassing the blacklist).",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "elefant/cms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.0.7"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2018-16974"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jbroadway/elefant/issues/287"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jbroadway/elefant/commit/49ba8cc24e9f009ce30d2c2eb9eefeb9be4ce1d0"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jbroadway/elefant/releases/tag/elefant_2_0_7_stable"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-434" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-07-25T19:39:02Z",
    "nvd_published_at" : "2018-09-12T21:29:00Z"
  }
}