Loading...
Skip to main content
GeekWala

CVE-2021-33564 — Vulnerability in dragonfly — CVE Details

CRITICAL

Dragonfly contains remote code execution vulnerability

Published June 2, 2021Updated February 16, 2024Source: osv

Summary

An argument injection vulnerability in the Dragonfly gem before 1.4.0 for Ruby allows remote attackers to read and write to arbitrary files via a crafted URL when the `verify_url` option is disabled. This may lead to code execution. The problem occurs because the generate and process features mishandle use of the ImageMagick convert utility.

Advisory Timeline

  • First published June 2, 2021 (1958 days ago).
  • Last revised February 16, 2024 — 988 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Bundler
Update dragonfly to 1.4.0 or later
gem install dragonfly -v 1.4.0

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: rubygems (1).

PackageEcosystemAffectedFixed In
dragonfly
rubygems
0.1.0, 0.1.1, 0.1.4, 0.1.5 (+76 more)1.4.0

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 9.8 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Frequently Asked Questions

What is CVE-2021-33564?
Dragonfly contains remote code execution vulnerability This vulnerability has been assigned a severity rating of CRITICAL (CVSS score: 9.8/10).
How do I check if my project is affected by CVE-2021-33564?
CVE-2021-33564 affects dragonfly. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2021-33564 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
9.8

Exploitation is straightforward and causes maximum impact. Patch immediately.

Also Known As

GHSA-j858-xp5v-f8xx

Related CVEs

  • CVE-2026-55107
    CRITICAL

    kobako Sandbox Escape: guest eval reaches host RCE via method_missing → public_send (any bound Service)

  • CVE-2021-33473
    CRITICAL

    Arbitrary file write in dragonfly

  • CVE-2026-77602
    CRITICAL

    OpenC3 COSMOS: Authenticated remote code execution via the user-writable config overlay (table definitions, cmd/tlm definitions, and script suites)

More RubyGems advisories

Check if you're affected

Scan your dependencies to see if this vulnerability affects your projects.

Scan Your Dependencies