CVE-2019-7912: Magento/community edition Magento Filter Extension Bypass Vulnerability

HIGH
Advisory Identifier: GHSA-f8h9-7rpq-7qcc
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CVSS 7.2
CWE-434
Published
Advisory Summary

CVE-2019-7912 is a HIGH (CVSS 7.2) magento filter extension bypass vulnerability (CWE-434: Unrestricted Upload of File with Dangerous Type) affecting Magento/community edition libraries in the Packagist ecosystem. The issue involves magento filter extension bypass via crafted store configuration keys. Remediation is available by upgrading affected packages to version 2.1.18, 2.2.9, 2.3.2.

CVE-2019-7912 at a Glance

CVE Identifier CVE-2019-7912
GHSA Identifier GHSA-f8h9-7rpq-7qcc
Severity HIGH
CVSS v3.1 Base Score 7.2
CWE Classification CWE-434: Unrestricted Upload of File with Dangerous Type
Affected Product Magento/community edition
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 7.2

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

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required High (PR:H)
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-2019-7912

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

magento/community-edition fixed: 2.1.18 
Upgrade magento/community-edition to 2.1.18
magento/community-edition fixed: 2.2.9 
Upgrade magento/community-edition to 2.2.9
magento/community-edition fixed: 2.3.2 
Upgrade magento/community-edition to 2.3.2
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 magento/community-edition

How to Check if You Are Affected

To determine whether your application is affected by CVE-2019-7912, inspect your project dependencies for Magento/community edition:

inspect dependencies for magento/community-edition

Analyze the terminal output to locate any version of Magento/community edition in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.1.18), 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 Magento/community edition, 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

A file upload filter bypass exists in Magento 2.1 prior to 2.1.18, Magento 2.2 prior to 2.2.9, Magento 2.3 prior to 2.3.2. This can be exploited by an authenticated user with admin privileges to edit configuration keys to remove file extension filters, potentially resulting in the malicious upload and execution of malicious files on the server.

CVE-2019-7912 Affected Magento/community edition Versions

3 component(s)
Fixed Versions:
2.1.182.2.92.3.2
Product / Package Ecosystem Affected Versions Fixed Version
magento/community-edition
 Packagist
≥ 2.1
< 2.1.18
2.1.18
magento/community-edition
 Packagist
≥ 2.2
< 2.2.9
2.2.9
magento/community-edition
 Packagist
≥ 2.3
< 2.3.2
2.3.2

References

NVD — CVE-2019-7912 NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-7912
Magento/community edition Source Repository REPOSITORY
https://github.com/FriendsOfPHP/security-advisories/blob/master/magento/product-community-edition/CVE-2019-7912.yaml
Magento/community edition Source Repository REPOSITORY
https://github.com/magento/magento2
Magento/community edition Security Information SECURITY
https://web.archive.org/web/20201220124205/https://magento.com/security/patches/magento-2.3.2-2.2.9-and-2.1.18-security-update-33

Frequently Asked Questions

What is CVE-2019-7912?
CVE-2019-7912 is a security vulnerability in Magento/community edition involving Magento Filter extension bypass via crafted store configuration keys under CWE-434: Unrestricted Upload of File with Dangerous Type.
Which Magento/community edition versions are affected?
Affected versions include releases prior to 2.1.18, 2.2.9, 2.3.2 across affected packages: magento/community-edition.
What version fixes CVE-2019-7912?
Upgrading to 2.1.18, 2.2.9, 2.3.2 (or the latest patched release for your respective branch) resolves the vulnerability.
Is magento/community-edition affected?
Yes, magento/community-edition is affected in releases prior to 2.1.18, 2.2.9, 2.3.2. Upgrade your dependency to 2.1.18, 2.2.9, 2.3.2 or later.
What is the CVSS score of CVE-2019-7912?
CVE-2019-7912 has a CVSS v3.1 base score of 7.2 (HIGH) with vector string CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2019-7912?
CVE-2019-7912 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-2019-7912?
Run the dependency tree command: 'inspect dependencies for magento/community-edition'. 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-f8h9-7rpq-7qcc",
  "modified" : "2024-05-15T22:39:24Z",
  "published" : "2022-05-24T16:52:27Z",
  "aliases" : [ "CVE-2019-7912" ],
  "summary" : "Magento Filter extension bypass via crafted store configuration keys",
  "details" : "A file upload filter bypass exists in Magento 2.1 prior to 2.1.18, Magento 2.2 prior to 2.2.9, Magento 2.3 prior to 2.3.2. This can be exploited by an authenticated user with admin privileges to edit configuration keys to remove file extension filters, potentially resulting in the malicious upload and execution of malicious files on the server.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "magento/community-edition"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.1"
      }, {
        "fixed" : "2.1.18"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "magento/community-edition"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.2"
      }, {
        "fixed" : "2.2.9"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "magento/community-edition"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.3"
      }, {
        "fixed" : "2.3.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2019-7912"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/magento/product-community-edition/CVE-2019-7912.yaml"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/magento/magento2"
  }, {
    "type" : "WEB",
    "url" : "https://web.archive.org/web/20201220124205/https://magento.com/security/patches/magento-2.3.2-2.2.9-and-2.1.18-security-update-33"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-434" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-05-15T22:39:24Z",
    "nvd_published_at" : "2019-08-02T22:15:00Z"
  }
}