CVE-2019-13574: Mini magick OS Command Injection Vulnerability

HIGH
Advisory Identifier: GHSA-r7j3-vvh2-xrpj
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CVSS 7.8
CWE-78
Published
Advisory Summary

CVE-2019-13574 is a HIGH (CVSS 7.8) os command injection vulnerability (CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')) affecting Mini magick libraries in the RubyGems ecosystem. The issue involves os command injection in minimagick. Remediation is available by upgrading affected packages to version 4.9.4.

CVE-2019-13574 at a Glance

CVE Identifier CVE-2019-13574
GHSA Identifier GHSA-r7j3-vvh2-xrpj
Severity HIGH
CVSS v3.1 Base Score 7.8
CWE Classification CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Affected Product Mini magick
Package Ecosystem RubyGems
Published Date
Last Updated

Security Impact

CVSS: 7.8

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

Attack Vector Local (AV:L)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction Required (UI:R)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2019-13574

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

mini_magick fixed: 4.9.4 
Upgrade mini_magick to 4.9.4
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 mini_magick

How to Check if You Are Affected

To determine whether your application is affected by CVE-2019-13574, inspect your project dependencies for Mini magick:

inspect dependencies for mini_magick

Analyze the terminal output to locate any version of Mini magick in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 4.9.4), 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-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection'), where the product constructs all or part of an os command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended os command when it is sent to a downstream component. In Mini magick, 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

In `lib/mini_magick/image.rb` in MiniMagick before 4.9.4, a fetched remote image filename could cause remote command execution because `Image.open` input is directly passed to `Kernel#open`, which accepts a `|` character followed by a command.

CVE-2019-13574 Affected Mini magick Versions

1 component(s)
Fixed Versions:
4.9.4
Product / Package Ecosystem Affected Versions Fixed Version
mini_magick
gem/mini_magick
RubyGems
< 4.9.4
4.9.4

References

NVD — CVE-2019-13574 NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-13574
Security Fix Commit FIX COMMIT
https://github.com/minimagick/minimagick/commit/4cd5081e58810d3394d27a67219e8e4e0445d851
benjamin-bouchet.com/blog/vulnerabilite-... WEB
https://benjamin-bouchet.com/blog/vulnerabilite-dans-la-gem-mini_magick-version-4-9-4
Mini magick Source Repository REPOSITORY
https://github.com/minimagick/minimagick
Mini magick Source Repository REPOSITORY
https://github.com/minimagick/minimagick/compare/d484786...293f9bb
Mini magick Release RELEASE
https://github.com/minimagick/minimagick/releases/tag/v4.9.4
Mini magick Source Repository REPOSITORY
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/mini_magick/CVE-2019-13574.yml
lists.debian.org/debian-lts-announce... WEB
https://lists.debian.org/debian-lts-announce/2019/10/msg00007.html
seclists.org/bugtraq/2019/jul/20 WEB
https://seclists.org/bugtraq/2019/Jul/20
Mini magick Security Information SECURITY
https://www.debian.org/security/2019/dsa-4481

Frequently Asked Questions

What is CVE-2019-13574?
CVE-2019-13574 is a security vulnerability in Mini magick involving OS Command Injection in MiniMagick under CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection').
Which Mini magick versions are affected?
Affected versions include releases prior to 4.9.4 across affected packages: mini_magick.
What version fixes CVE-2019-13574?
Upgrading to 4.9.4 (or the latest patched release for your respective branch) resolves the vulnerability.
Is mini_magick affected?
Yes, mini_magick is affected in releases prior to 4.9.4. Upgrade your dependency to 4.9.4 or later.
What is the CVSS score of CVE-2019-13574?
CVE-2019-13574 has a CVSS v3.1 base score of 7.8 (HIGH) with vector string CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2019-13574?
CVE-2019-13574 is classified under CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') (The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.).
How can I check RubyGems dependencies for CVE-2019-13574?
Run the dependency tree command: 'inspect dependencies for mini_magick'. 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-r7j3-vvh2-xrpj",
  "modified" : "2023-01-25T20:10:32Z",
  "published" : "2019-07-18T13:19:22Z",
  "aliases" : [ "CVE-2019-13574" ],
  "summary" : "OS Command Injection in MiniMagick",
  "details" : "In `lib/mini_magick/image.rb` in MiniMagick before 4.9.4, a fetched remote image filename could cause remote command execution because `Image.open` input is directly passed to `Kernel#open`, which accepts a `|` character followed by a command.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "RubyGems",
      "name" : "mini_magick"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "4.9.4"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2019-13574"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/minimagick/minimagick/commit/4cd5081e58810d3394d27a67219e8e4e0445d851"
  }, {
    "type" : "WEB",
    "url" : "https://benjamin-bouchet.com/blog/vulnerabilite-dans-la-gem-mini_magick-version-4-9-4"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/minimagick/minimagick"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/minimagick/minimagick/compare/d484786...293f9bb"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/minimagick/minimagick/releases/tag/v4.9.4"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/mini_magick/CVE-2019-13574.yml"
  }, {
    "type" : "WEB",
    "url" : "https://lists.debian.org/debian-lts-announce/2019/10/msg00007.html"
  }, {
    "type" : "WEB",
    "url" : "https://seclists.org/bugtraq/2019/Jul/20"
  }, {
    "type" : "WEB",
    "url" : "https://www.debian.org/security/2019/dsa-4481"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-78" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2019-07-18T13:18:58Z",
    "nvd_published_at" : "2019-07-12T03:15:00Z"
  }
}