Dragonfly Code Injection Schwachstelle

The impact of CVE-2013-1756 is severe, as it allows for remote code execution. An attacker could exploit this vulnerability to gain complete control over the affected server, potentially leading to data breaches, system compromise, and further malicious activity. The ability to execute arbitrary code means an attacker could install malware, steal sensitive data, or modify system configurations. Given the gem's role in handling file processing within Rails applications, the vulnerability could be exploited to upload malicious files or manipulate existing ones, further expanding the attack surface.

Organizations using Ruby on Rails applications that rely on the Dragonfly gem are at risk. This includes web applications that handle user-uploaded files, such as image processing, video transcoding, or document storage. Specifically, deployments using older versions of Dragonfly (≤0.8.5 and 0.9.x before 0.9.13) are particularly vulnerable.

• ruby / server:

find / -name 'Gemfile' -print0 | xargs -0 grep 'dragonfly'

• ruby / server:

bundle list | grep dragonfly

• ruby / server:

ps aux | grep dragonfly

1. 2013-05-16Discovery

   discovery

2. 2017-10-24Disclosure

   disclosure

1. Veröffentlicht2017-10-24
2. Geändert2025-04-14
3. EPSS aktualisiert2026-04-02

The primary mitigation for CVE-2013-1756 is to upgrade the Dragonfly gem to version 0.8.6 or later. If an immediate upgrade is not feasible due to compatibility issues or breaking changes, consider implementing strict input validation and sanitization on all data processed by the Dragonfly gem. Review and restrict file upload permissions to limit the potential impact of malicious uploads. Implement a Web Application Firewall (WAF) with rules to detect and block suspicious requests targeting Dragonfly endpoints. After upgrading, confirm the fix by attempting to trigger the vulnerable code path and verifying that it is no longer exploitable.