Vulnerability in Dragonfly Project
CVE-2021-33564
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.721 (99.4th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 99.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.721 · newest: 0.721 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/markevans/dragonfly/issues/513 (Third Party Advisory, Issue Tracking)
- github.com/markevans/dragonfly/commit/25399297bb457f7fcf8e3f91e85945b255b111b5 (Patch, Third Party Advisory)
- github.com/markevans/dragonfly/compare/v1.3.0...v1.4.0 (Patch, Third Party Advisory)
- raw.githubusercontent.com/projectdiscovery/nuclei-templates/master/cves/2021/CV… (Exploit, Third Party Advisory)
- github.com/mlr0p/CVE-2021-33564 (Exploit, Third Party Advisory)
- zxsecurity.co.nz/research/argunment-injection-ruby-dragonfly/ (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-33564?
- CVE-2021-33564 is a critical-severity vulnerability in Dragonfly Project, classified under Argument Injection. CVSS score: 9.8/10. Published 2021-05-29.
- How severe is CVE-2021-33564?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2021-33564 known to be exploited?
- 21 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.