---
cve: "CVE-2021-33564"
severity: "CRITICAL"
cvss: 9.8
epss: "69.4%"
vendor: "Generic Security"
kev: false
exploited: false
published: "2021-05-29 14:15:08"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-14T18:32:08+02:00"
---

# CVE-2021-33564

> 9.8 CRITICAL

## Beschreibung

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.

## CVSS-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- 35e88d14987bf425dcace67f9b100d9a23cae904 (Commit)
- 25399297bb457f7fcf8e3f91e85945b255b111b5 (Commit)

## Referenzen

- <https://github.com/markevans/dragonfly/commit/25399297bb457f7fcf8e3f91e85945b255b111b5>
- <https://github.com/markevans/dragonfly/compare/v1.3.0...v1.4.0>
- <https://github.com/markevans/dragonfly/issues/513>
- <https://github.com/mlr0p/CVE-2021-33564>
- <https://raw.githubusercontent.com/projectdiscovery/nuclei-templates/master/cves/2021/CVE-2021-33564.yaml>
- <https://zxsecurity.co.nz/research/argunment-injection-ruby-dragonfly/>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2021-33564) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_