GHSA-CF3W-G86H-35X4

Vulnerability from github – Published: 2021-02-08 19:16 – Updated: 2022-04-27 19:58
VLAI?
Summary
Code Injection vulnerability in CarrierWave::RMagick
Details

Impact

CarrierWave::RMagick has a Code Injection vulnerability. Its #manipulate! method inappropriately evals the content of mutation option(:read/:write), allowing attackers to craft a string that can be executed as a Ruby code. If an application developer supplies untrusted inputs to the option, it will lead to remote code execution(RCE).

(But supplying untrusted input to the option itself is dangerous even in absence of this vulnerability, since is prone to DoS vulnerability - attackers can try to consume massive amounts of memory by resizing to a very large dimension)

Proof of Concept

class MyUploader < CarrierWave::Uploader::Base
  include CarrierWave::RMagick
end

MyUploader.new.manipulate!({ read: { density: "1 }; p 'Hacked'; {" }}) # => shows "Hacked"

Patches

Upgrade to 2.1.1 or 1.3.2.

Workarounds

Stop supplying untrusted input to #manipulate!'s mutation option.

References

Code Injection Software Attack

For more information

If you have any questions or comments about this advisory: * Open an issue in CarrierWave repo * Email me at mit.shibuya@gmail.com

Severity ?
7.4 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L
Show details on source website
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "RubyGems",
        "name": "carrierwave"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.3.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "RubyGems",
        "name": "carrierwave"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.0.0"
            },
            {
              "fixed": "2.1.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2021-21305"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-74",
      "CWE-94"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2021-02-08T18:51:46Z",
    "nvd_published_at": "2021-02-08T20:15:00Z",
    "severity": "HIGH"
  },
  "details": "### Impact\n[CarrierWave::RMagick](https://github.com/carrierwaveuploader/carrierwave/blob/master/lib/carrierwave/processing/rmagick.rb) has a Code Injection vulnerability. Its `#manipulate!` method inappropriately evals the content of mutation option(`:read`/`:write`), allowing attackers to craft a string that can be executed as a Ruby code.\nIf an application developer supplies untrusted inputs to the option, it will lead to remote code execution(RCE).\n\n(But supplying untrusted input to the option itself is dangerous even in absence of this vulnerability, since is prone to DoS vulnerability - attackers can try to consume massive amounts of memory by resizing to a very large dimension)\n\n### Proof of Concept\n```ruby\nclass MyUploader \u003c CarrierWave::Uploader::Base\n  include CarrierWave::RMagick\nend\n\nMyUploader.new.manipulate!({ read: { density: \"1 }; p \u0027Hacked\u0027; {\" }}) # =\u003e shows \"Hacked\"\n```\n\n### Patches\nUpgrade to [2.1.1](https://rubygems.org/gems/carrierwave/versions/2.1.1) or [1.3.2](https://rubygems.org/gems/carrierwave/versions/1.3.2).\n\n### Workarounds\nStop supplying untrusted input to `#manipulate!`\u0027s mutation option.\n\n### References\n[Code Injection Software Attack](https://owasp.org/www-community/attacks/Code_Injection)\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue in [CarrierWave repo](https://github.com/carrierwaveuploader/carrierwave)\n* Email me at [mit.shibuya@gmail.com](mailto:mit.shibuya@gmail.com)",
  "id": "GHSA-cf3w-g86h-35x4",
  "modified": "2022-04-27T19:58:17Z",
  "published": "2021-02-08T19:16:39Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/carrierwaveuploader/carrierwave/security/advisories/GHSA-cf3w-g86h-35x4"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-21305"
    },
    {
      "type": "WEB",
      "url": "https://github.com/carrierwaveuploader/carrierwave/commit/387116f5c72efa42bc3938d946b4c8d2f22181b7"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/carrierwaveuploader/carrierwave"
    },
    {
      "type": "WEB",
      "url": "https://github.com/carrierwaveuploader/carrierwave/blob/master/CHANGELOG.md#132---2021-02-08"
    },
    {
      "type": "WEB",
      "url": "https://github.com/carrierwaveuploader/carrierwave/blob/master/CHANGELOG.md#211---2021-02-08"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/carrierwave/CVE-2021-21305.yml"
    },
    {
      "type": "WEB",
      "url": "https://rubygems.org/gems/carrierwave"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Code Injection vulnerability in CarrierWave::RMagick"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.