CVE-2016-6485: Magento/community edition Unauthenticated Crypto And Weak IV Vulnerability

HIGH
Advisory Identifier: GHSA-h7qw-mxrm-c6h2
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CVSS 7.5
CWE-327
Published
Advisory Summary

CVE-2016-6485 is a HIGH (CVSS 7.5) unauthenticated crypto and weak iv vulnerability (CWE-327: Use of a Broken or Risky Cryptographic Algorithm) affecting Magento/community edition libraries in the Packagist ecosystem. The issue involves unauthenticated crypto and weak iv in magento\framework\encryption. Remediation is available by upgrading affected packages to version 2.2.6.

CVE-2016-6485 at a Glance

CVE Identifier CVE-2016-6485
GHSA Identifier GHSA-h7qw-mxrm-c6h2
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-327: Use of a Broken or Risky Cryptographic Algorithm
Affected Product Magento/community edition
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 7.5

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

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 None (I:N)
Availability None (A:N)

How to Fix CVE-2016-6485

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: 2.2.6 
Upgrade magento/community-edition to 2.2.6
magento/project-community-edition fixed: Latest secure release 
Upgrade magento/project-community-edition to Latest secure release
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-2016-6485, 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 2.2.6), 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-327: Use of a Broken or Risky Cryptographic Algorithm, where the product uses a broken or risky cryptographic algorithm or protocol. 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

The __construct function in Framework/Encryption/Crypt.php in Magento 2 uses the PHP rand function to generate a random number for the initialization vector, which makes it easier for remote attackers to defeat cryptographic protection mechanisms by guessing the value.

CVE-2016-6485 Affected Magento/community edition Versions

2 component(s)
Fixed Versions:
2.2.6
Product / Package Ecosystem Affected Versions Fixed Version
magento/community-edition
 Packagist
≥ 2.0
< 2.2.6
2.2.6
magento/project-community-edition
 Packagist
≥ 2.0
≤ 2.0.2

References

NVD — CVE-2016-6485 NVD
https://nvd.nist.gov/vuln/detail/CVE-2016-6485
Magento/community edition Source Repository REPOSITORY
https://github.com/magento/magento2/pull/15017
Magento/community edition Source Repository REPOSITORY
https://github.com/FriendsOfPHP/security-advisories/blob/master/magento/product-community-edition/CVE-2016-6485.yaml
Magento/community edition Security Information SECURITY
http://www.openwall.com/lists/oss-security/2016/07/19/3
Magento/community edition Security Information SECURITY
http://www.openwall.com/lists/oss-security/2016/07/27/14

Frequently Asked Questions

What is CVE-2016-6485?
CVE-2016-6485 is a security vulnerability in Magento/community edition involving Unauthenticated crypto and weak IV in Magento\Framework\Encryption under CWE-327: Use of a Broken or Risky Cryptographic Algorithm.
Which Magento/community edition versions are affected?
Affected versions include releases prior to 2.2.6 across affected packages: magento/community-edition, magento/project-community-edition.
What version fixes CVE-2016-6485?
Upgrading to 2.2.6 (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 2.2.6. Upgrade your dependency to 2.2.6 or later.
Is magento/project-community-edition affected?
Yes, magento/project-community-edition is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2016-6485?
CVE-2016-6485 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
What CWE is associated with CVE-2016-6485?
CVE-2016-6485 is classified under CWE-327: Use of a Broken or Risky Cryptographic Algorithm (The product uses a broken or risky cryptographic algorithm or protocol.).
How can I check Packagist dependencies for CVE-2016-6485?
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-h7qw-mxrm-c6h2",
  "modified" : "2025-02-10T20:07:38Z",
  "published" : "2019-11-20T01:33:05Z",
  "aliases" : [ "CVE-2016-6485" ],
  "summary" : "Unauthenticated crypto and weak IV in Magento\\Framework\\Encryption",
  "details" : "The __construct function in Framework/Encryption/Crypt.php in Magento 2 uses the PHP rand function to generate a random number for the initialization vector, which makes it easier for remote attackers to defeat cryptographic protection mechanisms by guessing the value.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "magento/community-edition"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.0"
      }, {
        "fixed" : "2.2.6"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "magento/project-community-edition"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.0"
      }, {
        "last_affected" : "2.0.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2016-6485"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/magento/magento2/pull/15017"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/magento/product-community-edition/CVE-2016-6485.yaml"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2016/07/19/3"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2016/07/27/14"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-327" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2019-11-19T01:07:44Z",
    "nvd_published_at" : null
  }
}