CVE-2018-15601: Elefant/cms Elefant CMS Improper Input Validation Vulnerability

CRITICAL
Advisory Identifier: GHSA-pcf7-5974-vjh4
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CVSS 9.8
CWE-20
Published
Advisory Summary

CVE-2018-15601 is a CRITICAL (CVSS 9.8) elefant cms improper input validation vulnerability (CWE-20: Improper Input Validation) affecting Elefant/cms libraries in the Packagist ecosystem. The issue involves elefant cms improper input validation. Remediation is available by upgrading affected packages to version 2.0.4.

CVE-2018-15601 at a Glance

CVE Identifier CVE-2018-15601
GHSA Identifier GHSA-pcf7-5974-vjh4
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-20: Improper Input Validation
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-2018-15601

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: 2.0.4 
Upgrade elefant/cms to 2.0.4
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-2018-15601, 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 2.0.4), 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-20: Improper Input Validation, where the product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. 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

`apps/filemanager/handlers/upload/drop.php` in Elefant CMS 2.0.3 performs a urldecode step too late in the "Cannot upload executable files" protection mechanism.

CVE-2018-15601 Affected Elefant/cms Versions

1 component(s)
Fixed Versions:
2.0.4
Product / Package Ecosystem Affected Versions Fixed Version
elefant/cms
 Packagist
< 2.0.4
2.0.4

References

NVD — CVE-2018-15601 NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-15601
Security Fix Commit FIX COMMIT
https://github.com/jbroadway/elefant/commit/afb3346e50b992bcba143660ca2149e563430e05

Frequently Asked Questions

What is CVE-2018-15601?
CVE-2018-15601 is a security vulnerability in Elefant/cms involving Elefant CMS Improper Input Validation under CWE-20: Improper Input Validation.
Which Elefant/cms versions are affected?
Affected versions include releases prior to 2.0.4 across affected packages: elefant/cms.
What version fixes CVE-2018-15601?
Upgrading to 2.0.4 (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 2.0.4. Upgrade your dependency to 2.0.4 or later.
What is the CVSS score of CVE-2018-15601?
CVE-2018-15601 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-2018-15601?
CVE-2018-15601 is classified under CWE-20: Improper Input Validation (The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.).
How can I check Packagist dependencies for CVE-2018-15601?
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-pcf7-5974-vjh4",
  "modified" : "2023-07-25T19:21:06Z",
  "published" : "2022-05-14T02:20:16Z",
  "aliases" : [ "CVE-2018-15601" ],
  "summary" : "Elefant CMS Improper Input Validation",
  "details" : "`apps/filemanager/handlers/upload/drop.php` in Elefant CMS 2.0.3 performs a urldecode step too late in the \"Cannot upload executable files\" protection mechanism.",
  "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" : "2.0.4"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 2.0.3"
    }
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2018-15601"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jbroadway/elefant/commit/afb3346e50b992bcba143660ca2149e563430e05"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-20" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-07-25T19:21:06Z",
    "nvd_published_at" : "2018-08-21T02:29:00Z"
  }
}