CVE-2019-7942: Magento/community edition Remote Code Execution Vulnerability

Q: What is CVE-2019-7942?

CVE-2019-7942 is a security vulnerability in Magento/community edition involving Magento 2 Community Edition RCE under CWE-94: Improper Control of Generation of Code ('Code Injection').

Q: 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.

Q: What version fixes CVE-2019-7942?

Upgrading to 2.1.18, 2.2.9, 2.3.2 (or the latest patched release for your respective branch) resolves the vulnerability.

Q: 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.

Q: What is the CVSS score of CVE-2019-7942?

CVE-2019-7942 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.

Q: What CWE is associated with CVE-2019-7942?

CVE-2019-7942 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.).

Q: How can I check Packagist dependencies for CVE-2019-7942?

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.

HIGH

Advisory Identifier: GHSA-vvf9-fxhv-4rgj

CVSS 7.2

CWE-94

Published 2022-05-24

Advisory Summary

CVE-2019-7942 is a HIGH (CVSS 7.2) remote code execution vulnerability (CWE-94: Improper Control of Generation of Code ('Code Injection')) affecting Magento/community edition libraries in the Packagist ecosystem. The issue involves magento 2 community edition rce. Remediation is available by upgrading affected packages to version 2.1.18, 2.2.9, 2.3.2.

CVE-2019-7942 at a Glance

CVE Identifier CVE-2019-7942

GHSA Identifier GHSA-vvf9-fxhv-4rgj

Severity HIGH

CVSS v3.1 Base Score 7.2

CWE Classification CWE-94: Improper Control of Generation of Code ('Code Injection')

Affected Product Magento/community edition

Package Ecosystem Packagist

Published Date 2022-05-24

Last Updated 2024-02-12

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-2019-7942

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-2019-7942, 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-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 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 remote code execution vulnerability 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. An authenticated user with admin privileges to create or edit a product can execute arbitrary code via malicious XML layout updates.

CVE-2019-7942 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	≥ 2.1.0 < 2.1.18	2.1.18
magento/community-edition	Packagist	≥ 2.2.0 < 2.2.9	2.2.9
magento/community-edition	Packagist	≥ 2.3.0 < 2.3.2	2.3.2

References

NVD — CVE-2019-7942 NVD

https://nvd.nist.gov/vuln/detail/CVE-2019-7942

Magento/community edition Source Repository REPOSITORY

https://github.com/FriendsOfPHP/security-advisories/blob/master/magento/product-community-edition/CVE-2019-7942.yaml

Magento/community edition Source Repository REPOSITORY

https://github.com/magento/magento2

Magento/community edition Security Information SECURITY

https://magento.com/security/patches/magento-2.3.2-2.2.9-and-2.1.18-security-update-13

Magento/community edition Security Information SECURITY

https://web.archive.org/web/20211206084839/https://magento.com/security/patches/magento-2.3.2-2.2.9-and-2.1.18-security-update-13

Frequently Asked Questions

What is CVE-2019-7942?

CVE-2019-7942 is a security vulnerability in Magento/community edition involving Magento 2 Community Edition RCE under CWE-94: Improper Control of Generation of Code ('Code Injection').

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-2019-7942?

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-2019-7942?

CVE-2019-7942 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-2019-7942?

CVE-2019-7942 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 CVE-2019-7942?

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-vvf9-fxhv-4rgj",
  "modified" : "2024-02-12T11:48:00Z",
  "published" : "2022-05-24T16:52:28Z",
  "aliases" : [ "CVE-2019-7942" ],
  "summary" : "Magento 2 Community Edition RCE",
  "details" : "A remote code execution vulnerability 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. An authenticated user with admin privileges to create or edit a product can execute arbitrary code via malicious XML layout updates.",
  "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" : "2.1.0"
      }, {
        "fixed" : "2.1.18"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "magento/community-edition"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.2.0"
      }, {
        "fixed" : "2.2.9"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "magento/community-edition"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.3.0"
      }, {
        "fixed" : "2.3.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2019-7942"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/magento/product-community-edition/CVE-2019-7942.yaml"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/magento/magento2"
  }, {
    "type" : "WEB",
    "url" : "https://magento.com/security/patches/magento-2.3.2-2.2.9-and-2.1.18-security-update-13"
  }, {
    "type" : "WEB",
    "url" : "https://web.archive.org/web/20211206084839/https://magento.com/security/patches/magento-2.3.2-2.2.9-and-2.1.18-security-update-13"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-94" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-07-14T23:20:20Z",
    "nvd_published_at" : "2019-08-02T22:15:00Z"
  }
}

CVSS V3

7.2 HIGH