CVE-2018-3814: Craftcms/cms Craft CMS PHP Code Injection Vulnerability

HIGH

Advisory Identifier: GHSA-r342-vjc4-wrmj

CVSS 8.8

Published 2022-05-13

Advisory Summary

CVE-2018-3814 is a HIGH (CVSS 8.8) craft cms php code injection vulnerability (CWE-434: Unrestricted Upload of File with Dangerous Type) affecting Craftcms/cms libraries in the Packagist ecosystem. The issue involves craft cms php code injection vulnerability. Remediation is available in the latest vendor maintenance releases.

CVE-2018-3814 at a Glance

CVE Identifier CVE-2018-3814

GHSA Identifier GHSA-r342-vjc4-wrmj

Severity HIGH

CVSS v3.1 Base Score 8.8

CWE Classification CWE-434: Unrestricted Upload of File with Dangerous Type

Affected Product Craftcms/cms

Package Ecosystem Packagist

Published Date 2022-05-13

Last Updated 2024-04-25

Security Impact

CVSS: 8.8

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:H/A:H).

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 High (I:H)

Availability High (A:H)

How to Fix CVE-2018-3814

To remediate this vulnerability, upgrade all affected Craftcms/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.

craftcms/cms fixed: Latest secure release

Upgrade craftcms/cms to Latest secure release

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 craftcms/cms

How to Check if You Are Affected

To determine whether your application is affected by CVE-2018-3814, inspect your project dependencies for Craftcms/cms:

inspect dependencies for craftcms/cms

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

Craft CMS 2.6.3000 allows remote attackers to execute arbitrary PHP code by using the "Assets->Upload files" screen and then the "Replace it" option, because this allows a .jpg file to have embedded PHP code, and then be renamed to a .php extension.

CVE-2018-3814 Affected Craftcms/cms Versions

1 component(s)

Product / Package	Ecosystem	Affected Versions	Fixed Version
craftcms/cms	Packagist	≤ 2.6.3000

References

NVD — CVE-2018-3814 NVD

https://nvd.nist.gov/vuln/detail/CVE-2018-3814

Craftcms/cms Source Repository REPOSITORY

https://github.com/Snowty/myCVE/blob/master/CraftCMS-2.6.3000/README.md

Craftcms/cms Source Repository REPOSITORY

https://github.com/craftcms/cms

web.archive.org/web/20170612231205/... WEB

https://web.archive.org/web/20170612231205/http://0day5.com/archives/4122

Frequently Asked Questions

What is CVE-2018-3814?

CVE-2018-3814 is a security vulnerability in Craftcms/cms involving Craft CMS PHP Code Injection Vulnerability under CWE-434: Unrestricted Upload of File with Dangerous Type.

Which Craftcms/cms versions are affected?

Affected versions include releases prior to current release patches across affected packages: craftcms/cms.

What version fixes CVE-2018-3814?

Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.

Is craftcms/cms affected?

Yes, craftcms/cms is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.

What is the CVSS score of CVE-2018-3814?

CVE-2018-3814 has a CVSS v3.1 base score of 8.8 (HIGH) with vector string CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

What CWE is associated with CVE-2018-3814?

CVE-2018-3814 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-2018-3814?

Run the dependency tree command: 'inspect dependencies for craftcms/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-r342-vjc4-wrmj",
  "modified" : "2024-04-25T22:32:14Z",
  "published" : "2022-05-13T01:20:14Z",
  "aliases" : [ "CVE-2018-3814" ],
  "summary" : "Craft CMS PHP Code Injection Vulnerability",
  "details" : "Craft CMS 2.6.3000 allows remote attackers to execute arbitrary PHP code by using the \"Assets->Upload files\" screen and then the \"Replace it\" option, because this allows a .jpg file to have embedded PHP code, and then be renamed to a .php extension.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "craftcms/cms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "2.6.3000"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2018-3814"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/Snowty/myCVE/blob/master/CraftCMS-2.6.3000/README.md"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/craftcms/cms"
  }, {
    "type" : "WEB",
    "url" : "https://web.archive.org/web/20170612231205/http://0day5.com/archives/4122"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-434" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-04-25T22:32:14Z",
    "nvd_published_at" : "2018-01-01T20:29:00Z"
  }
}

CVSS V3

8.8 HIGH