GHSA-67wg-6j7r-mqh8: Typo3/cms Arbitrary Code Execution Vulnerability

CRITICAL
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CVSS 9.9
CWE-94
Published
Advisory Summary

GHSA-67wg-6j7r-mqh8 is a CRITICAL (CVSS 9.9) arbitrary code execution vulnerability (CWE-94: Improper Control of Generation of Code ('Code Injection')) affecting Typo3/cms libraries in the Packagist ecosystem. The issue involves arbitrary code execution in typo3 cms. Remediation is available by upgrading affected packages to version 7.6.22, 8.7.5.

GHSA-67wg-6j7r-mqh8 at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-67wg-6j7r-mqh8
Severity CRITICAL
CVSS v3.1 Base Score 9.9
CWE Classification CWE-94: Improper Control of Generation of Code ('Code Injection')
Affected Product Typo3/cms
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 9.9

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

How to Fix GHSA-67wg-6j7r-mqh8

To remediate this vulnerability, upgrade all affected Typo3/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.

typo3/cms fixed: 7.6.22 
Upgrade typo3/cms to 7.6.22
typo3/cms fixed: 8.7.5 
Upgrade typo3/cms to 8.7.5
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 typo3/cms

How to Check if You Are Affected

To determine whether your application is affected by GHSA-67wg-6j7r-mqh8, inspect your project dependencies for Typo3/cms:

inspect dependencies for typo3/cms

Analyze the terminal output to locate any version of Typo3/cms in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 7.6.22), 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-94: Improper Control of Generation of Code ('Code Injection'), where the product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. In Typo3/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

Due to a missing file extension in the fileDenyPattern, backend user are allowed to upload *.pht files which can be executed in certain web server setups. The new default fileDenyPattern is the following, which might have been overridden in the TYPO3 Install Tool. ``` \.(php[3-7]?|phpsh|phtml|pht)(\..*)?$|^\.htaccess$ ```

GHSA-67wg-6j7r-mqh8 Affected Typo3/cms Versions

2 component(s)
Fixed Versions:
7.6.228.7.5
Product / Package Ecosystem Affected Versions Fixed Version
typo3/cms
 Packagist
≥ 7.6.0
< 7.6.22
7.6.22
typo3/cms
 Packagist
≥ 8.0.0
< 8.7.5
8.7.5

References

Typo3/cms Source Repository REPOSITORY
https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/2017-09-05-4.yaml
Typo3/cms Source Repository REPOSITORY
https://github.com/TYPO3/typo3
Typo3/cms Security Information SECURITY
https://typo3.org/security/advisory/typo3-core-sa-2017-007

Frequently Asked Questions

What is GHSA-67wg-6j7r-mqh8?
GHSA-67wg-6j7r-mqh8 is a security vulnerability in Typo3/cms involving Arbitrary Code Execution in TYPO3 CMS under CWE-94: Improper Control of Generation of Code ('Code Injection').
Which Typo3/cms versions are affected?
Affected versions include releases prior to 7.6.22, 8.7.5 across affected packages: typo3/cms.
What version fixes GHSA-67wg-6j7r-mqh8?
Upgrading to 7.6.22, 8.7.5 (or the latest patched release for your respective branch) resolves the vulnerability.
Is typo3/cms affected?
Yes, typo3/cms is affected in releases prior to 7.6.22, 8.7.5. Upgrade your dependency to 7.6.22, 8.7.5 or later.
What is the CVSS score of GHSA-67wg-6j7r-mqh8?
GHSA-67wg-6j7r-mqh8 has a CVSS v3.1 base score of 9.9 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.
What CWE is associated with GHSA-67wg-6j7r-mqh8?
GHSA-67wg-6j7r-mqh8 is classified under CWE-94: Improper Control of Generation of Code ('Code Injection') (The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.).
How can I check Packagist dependencies for GHSA-67wg-6j7r-mqh8?
Run the dependency tree command: 'inspect dependencies for typo3/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-67wg-6j7r-mqh8",
  "modified" : "2024-06-05T15:07:09Z",
  "published" : "2024-06-05T15:07:09Z",
  "aliases" : [ ],
  "summary" : "Arbitrary Code Execution in TYPO3 CMS",
  "details" : "Due to a missing file extension in the fileDenyPattern, backend user are allowed to upload *.pht files which can be executed in certain web server setups. The new default fileDenyPattern is the following, which might have been overridden in the TYPO3 Install Tool.\n```\n\\.(php[3-7]?|phpsh|phtml|pht)(\\..*)?$|^\\.htaccess$\n```",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "typo3/cms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "7.6.0"
      }, {
        "fixed" : "7.6.22"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "typo3/cms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "8.0.0"
      }, {
        "fixed" : "8.7.5"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/2017-09-05-4.yaml"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/TYPO3/typo3"
  }, {
    "type" : "WEB",
    "url" : "https://typo3.org/security/advisory/typo3-core-sa-2017-007"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-94" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-06-05T15:07:09Z",
    "nvd_published_at" : null
  }
}