SB2021060710 - Remote code execution in Dragonfly gem for Ruby
Published: June 7, 2021 Updated: June 20, 2021
Security Bulletin ID
SB2021060710
Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Code Injection (CVE-ID: CVE-2021-33564)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to the generate and process features mishandle use of the ImageMagick convert utility when the "verify_url" option is disabled. A remote attacker can send a specially crafted request and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Remediation
Install update from vendor's website.
References
- https://github.com/markevans/dragonfly/compare/v1.3.0...v1.4.0
- https://github.com/markevans/dragonfly/commit/25399297bb457f7fcf8e3f91e85945b255b111b5
- 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/
- https://github.com/markevans/dragonfly/issues/513