CVE-2021-33564

high-risk
Published 2021-05-29

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.

Do I need to act?

!
93.4% chance of exploitation in next 30 days
EPSS score — higher than 7% of all CVEs
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
9
CVSS 9.8/10 Critical
NETWORK / LOW complexity

Affected Products (1)

Affected Vendors

Dragonfly Project

References (12)

Patch https://github.com/markevans/dragonfly/commit/25399297bb457f7fcf8e3f91e85945b255...
Patch https://github.com/markevans/dragonfly/compare/v1.3.0...v1.4.0
Issue Tracking https://github.com/markevans/dragonfly/issues/513
Exploit https://github.com/mlr0p/CVE-2021-33564
Exploit https://raw.githubusercontent.com/projectdiscovery/nuclei-templates/master/cves/...
Exploit https://zxsecurity.co.nz/research/argunment-injection-ruby-dragonfly/
Patch https://github.com/markevans/dragonfly/commit/25399297bb457f7fcf8e3f91e85945b255...
Patch https://github.com/markevans/dragonfly/compare/v1.3.0...v1.4.0
Issue Tracking https://github.com/markevans/dragonfly/issues/513
Exploit https://github.com/mlr0p/CVE-2021-33564
Exploit https://raw.githubusercontent.com/projectdiscovery/nuclei-templates/master/cves/...
Exploit https://zxsecurity.co.nz/research/argunment-injection-ruby-dragonfly/
57
/ 100
high-risk
Severity 32/34 · Critical
Exploitability 20/34 · Moderate
Exposure 5/34 · Minimal