CVE-2019-8135: Magento/community edition Remote Code Execution Vulnerability

CRITICAL
Advisory Identifier: GHSA-3q5x-7mxp-rp6j
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CVSS 9.8
CWE-74
Published
Advisory Summary

CVE-2019-8135 is a CRITICAL (CVSS 9.8) remote code execution vulnerability (CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')) affecting Magento/community edition libraries in the Packagist ecosystem. The issue involves remote code execution via vulnerable symphony dependecy injection. Remediation is available by upgrading affected packages to version 2.2.10, 2.3.2-p2.

CVE-2019-8135 at a Glance

CVE Identifier CVE-2019-8135
GHSA Identifier GHSA-3q5x-7mxp-rp6j
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
Affected Product Magento/community edition
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 9.8

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

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
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-2019-8135

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: 2.2.10 
Upgrade magento/community-edition to 2.2.10
magento/community-edition fixed: 2.3.2-p2 
Upgrade magento/community-edition to 2.3.2-p2
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-2019-8135, 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 2.2.10), 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-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection'), where the product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component. 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 2.2 prior to 2.2.10, Magento 2.3 prior to 2.3.3 or 2.3.2-p1. Dependency injection through Symphony framework allows service identifiers to be derived from user controlled data, which can lead to remote code execution. As per [the Magento Release 2.3.3](https://web.archive.org/web/20201126132230/https://devdocs.magento.com/guides/v2.3/release-notes/release-notes-2-3-3-commerce.html#new-security-only-patch-available), if you have already implemented the pre-release version of this patch (2.3.2-p1), it is highly recommended to promptly upgrade to 2.3.2-p2.

CVE-2019-8135 Affected Magento/community edition Versions

2 component(s)
Fixed Versions:
2.2.102.3.2-p2
Product / Package Ecosystem Affected Versions Fixed Version
magento/community-edition
 Packagist
≥ 2.2
< 2.2.10
2.2.10
magento/community-edition
 Packagist
≥ 2.3
< 2.3.2-p2
2.3.2-p2

References

NVD — CVE-2019-8135 NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-8135
Magento/community edition Source Repository REPOSITORY
https://github.com/FriendsOfPHP/security-advisories/blob/master/magento/product-community-edition/CVE-2019-8135.yaml
Magento/community edition Security Information SECURITY
https://magento.com/security/patches/magento-2.3.3-and-2.2.10-security-update

Frequently Asked Questions

What is CVE-2019-8135?
CVE-2019-8135 is a security vulnerability in Magento/community edition involving Remote code execution via vulnerable Symphony dependecy injection under CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection').
Which Magento/community edition versions are affected?
Affected versions include releases prior to 2.2.10, 2.3.2-p2 across affected packages: magento/community-edition.
What version fixes CVE-2019-8135?
Upgrading to 2.2.10, 2.3.2-p2 (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 2.2.10, 2.3.2-p2. Upgrade your dependency to 2.2.10, 2.3.2-p2 or later.
What is the CVSS score of CVE-2019-8135?
CVE-2019-8135 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2019-8135?
CVE-2019-8135 is classified under CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') (The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.).
How can I check Packagist dependencies for CVE-2019-8135?
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-3q5x-7mxp-rp6j",
  "modified" : "2024-02-12T11:59:17Z",
  "published" : "2019-11-12T22:59:32Z",
  "aliases" : [ "CVE-2019-8135" ],
  "summary" : "Remote code execution via vulnerable Symphony dependecy injection",
  "details" : "A remote code execution vulnerability exists in Magento 2.2 prior to 2.2.10, Magento 2.3 prior to 2.3.3 or 2.3.2-p1. Dependency injection through Symphony framework allows service identifiers to be derived from user controlled data, which can lead to remote code execution.\nAs per [the Magento Release 2.3.3](https://web.archive.org/web/20201126132230/https://devdocs.magento.com/guides/v2.3/release-notes/release-notes-2-3-3-commerce.html#new-security-only-patch-available), if you have already implemented the pre-release version of this patch (2.3.2-p1), it is highly recommended to promptly upgrade to 2.3.2-p2.\n",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "magento/community-edition"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.2"
      }, {
        "fixed" : "2.2.10"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "magento/community-edition"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.3"
      }, {
        "fixed" : "2.3.2-p2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2019-8135"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/magento/product-community-edition/CVE-2019-8135.yaml"
  }, {
    "type" : "WEB",
    "url" : "https://magento.com/security/patches/magento-2.3.3-and-2.2.10-security-update"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-74" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2019-11-12T22:13:36Z",
    "nvd_published_at" : null
  }
}