GHSA-f9hr-7cfq-mjg2: Typo3/cms core TYPO3 Arbitrary Code Execution Vulnerability

HIGH
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CVSS 8.8
CWE-434
Published
Advisory Summary

GHSA-f9hr-7cfq-mjg2 is a HIGH (CVSS 8.8) typo3 arbitrary code execution vulnerability (CWE-434: Unrestricted Upload of File with Dangerous Type) affecting Typo3/cms core libraries in the Packagist ecosystem. The issue involves typo3 arbitrary code execution via file list module. Remediation is available by upgrading affected packages to version 8.7.23, 9.5.4.

GHSA-f9hr-7cfq-mjg2 at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-f9hr-7cfq-mjg2
Severity HIGH
CVSS v3.1 Base Score 8.8
CWE Classification CWE-434: Unrestricted Upload of File with Dangerous Type
Affected Product Typo3/cms core
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 8.8

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: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 GHSA-f9hr-7cfq-mjg2

To remediate this vulnerability, upgrade all affected Typo3/cms core 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-core fixed: 8.7.23 
Upgrade typo3/cms-core to 8.7.23
typo3/cms-core fixed: 9.5.4 
Upgrade typo3/cms-core to 9.5.4
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 typo3/cms-core

How to Check if You Are Affected

To determine whether your application is affected by GHSA-f9hr-7cfq-mjg2, inspect your project dependencies for Typo3/cms core:

inspect dependencies for typo3/cms-core

Analyze the terminal output to locate any version of Typo3/cms core in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 8.7.23), 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 Typo3/cms core, 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 missing file extensions in $GLOBALS['TYPO3_CONF_VARS']['BE'][‘fileDenyPattern’], backend users are allowed to upload *.phar, *.shtml, *.pl or *.cgi files which can be executed in certain web server setups. A valid backend user account is needed in order to exploit this vulnerability. Derivatives of Debian GNU Linux are handling *.phar files as PHP applications since PHP 7.1 (for unofficial packages) and PHP 7.2 (for official packages). The file extension *.shtml is bound to server side includes which are not enabled per default in most common Linux based distributions. File extension *.pl and *.cgi require additional handlers to be configured which is also not the case in most common distributions (except for /cgi-bin/ location).

GHSA-f9hr-7cfq-mjg2 Affected Typo3/cms core Versions

2 component(s)
Fixed Versions:
8.7.239.5.4
Product / Package Ecosystem Affected Versions Fixed Version
typo3/cms-core
 Packagist
≥ 8.0.0
< 8.7.23
8.7.23
typo3/cms-core
 Packagist
≥ 9.0.0
< 9.5.4
9.5.4

References

Security Fix Commit FIX COMMIT
https://github.com/TYPO3-CMS/core/commit/45c311d120c359d54cc918e962c374e774239899
Security Fix Commit FIX COMMIT
https://github.com/TYPO3-CMS/core/commit/5095084efae471c5fef7b578f2bc8a5060e1e148
Typo3/cms core Source Repository REPOSITORY
https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/2019-01-22-7.yaml
Typo3/cms core Source Repository REPOSITORY
https://github.com/TYPO3-CMS/core
Typo3/cms core Security Information SECURITY
https://typo3.org/security/advisory/typo3-core-sa-2019-008

Frequently Asked Questions

What is GHSA-f9hr-7cfq-mjg2?
GHSA-f9hr-7cfq-mjg2 is a security vulnerability in Typo3/cms core involving TYPO3 Arbitrary Code Execution via File List Module under CWE-434: Unrestricted Upload of File with Dangerous Type.
Which Typo3/cms core versions are affected?
Affected versions include releases prior to 8.7.23, 9.5.4 across affected packages: typo3/cms-core.
What version fixes GHSA-f9hr-7cfq-mjg2?
Upgrading to 8.7.23, 9.5.4 (or the latest patched release for your respective branch) resolves the vulnerability.
Is typo3/cms-core affected?
Yes, typo3/cms-core is affected in releases prior to 8.7.23, 9.5.4. Upgrade your dependency to 8.7.23, 9.5.4 or later.
What is the CVSS score of GHSA-f9hr-7cfq-mjg2?
GHSA-f9hr-7cfq-mjg2 has a CVSS v3.1 base score of 8.8 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with GHSA-f9hr-7cfq-mjg2?
GHSA-f9hr-7cfq-mjg2 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 GHSA-f9hr-7cfq-mjg2?
Run the dependency tree command: 'inspect dependencies for typo3/cms-core'. 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-f9hr-7cfq-mjg2",
  "modified" : "2024-05-30T16:13:05Z",
  "published" : "2024-05-30T16:13:05Z",
  "aliases" : [ ],
  "summary" : "TYPO3 Arbitrary Code Execution via File List Module",
  "details" : "Due to missing file extensions in $GLOBALS['TYPO3_CONF_VARS']['BE'][‘fileDenyPattern’], backend users are allowed to upload *.phar, *.shtml, *.pl or *.cgi files which can be executed in certain web server setups. A valid backend user account is needed in order to exploit this vulnerability.\n\nDerivatives of Debian GNU Linux are handling *.phar files as PHP applications since PHP 7.1 (for unofficial packages) and PHP 7.2 (for official packages).\n\nThe file extension *.shtml is bound to server side includes which are not enabled per default in most common Linux based distributions. File extension *.pl and *.cgi require additional handlers to be configured which is also not the case in most common distributions (except for /cgi-bin/ location).\n\n",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "typo3/cms-core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "8.0.0"
      }, {
        "fixed" : "8.7.23"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "typo3/cms-core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "9.0.0"
      }, {
        "fixed" : "9.5.4"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/TYPO3-CMS/core/commit/45c311d120c359d54cc918e962c374e774239899"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/TYPO3-CMS/core/commit/5095084efae471c5fef7b578f2bc8a5060e1e148"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/2019-01-22-7.yaml"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/TYPO3-CMS/core"
  }, {
    "type" : "WEB",
    "url" : "https://typo3.org/security/advisory/typo3-core-sa-2019-008"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-434" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-05-30T16:13:05Z",
    "nvd_published_at" : null
  }
}