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CVE-2013-1756 is a Code Injection vulnerability in mark_evans dragonfly gem. O3 Security detects and blocks CVE-2013-1756 exploitation at runtime via eBPF exploit-chain detection and L7 egress monitoring, even on unpatched systems.

The Dragonfly gem 0.7 before 0.8.6 and 0.9.x before 0.9.13 for Ruby, when used with Ruby on Rails, allows remote attackers to execute arbitrary code via a crafted request.

Published
Jun 9, 2014
Updated
Jun 16, 2026
Affected
1 product
Patched
See advisory
Exploits
None indexed
Exploitation data as of Jun 16, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Description

The Dragonfly gem 0.7 before 0.8.6 and 0.9.x before 0.9.13 for Ruby, when used with Ruby on Rails, allows remote attackers to execute arbitrary code via a crafted request.

Affected Products

1 product · 26 configurations
Application
dragonfly gemmark_evans
26 versions
0.7.00.7.10.7.20.7.30.7.40.7.50.7.60.7.70.8.00.8.10.8.20.8.4

Detection & mitigation playbook

Vendor / appliance
  1. Detect

    Inventory every mark_evans dragonfly gem deployment and check each version against the affected-products list above. Because the exploit targets the running system rather than your application code, also watch for remote code execution at the network and runtime layer — O3 flags the exploit behaviour from runtime telemetry and egress traffic even before a vulnerable build is confirmed.

  2. Remediation status

    No patch has shipped for CVE-2013-1756 yet — track the mark_evans dragonfly gem advisory for a fixed release and apply the workarounds below in the meantime.

  3. Mitigate without a patch

    Cut exposure now: restrict the management/admin interface to trusted networks, segment the device, and apply the vendor's recommended configuration mitigations and any WAF/IPS signature. O3's runtime protection blocks the exploit chain at execution, holding the line on unpatched or end-of-life systems until you can patch.

  4. How O3 protects you

    O3 detects and blocks CVE-2013-1756 exploitation at runtime: eBPF exploit-chain detection, plus L7 egress monitoring that catches the post-exploitation callback and severs the attacker's outbound channel.

Tailored to CVE-2013-1756. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

The Dragonfly gem 0.7 before 0.8.6 and 0.9.x before 0.9.13 for Ruby, when used with Ruby on Rails, allows remote attackers to execute arbitrary code via a crafted request.
O3 Security · Runtime Protection

Is CVE-2013-1756 being exploited in your environment?

O3's eBPF runtime sensors and L7 egress monitoring detect and block the CVE-2013-1756 exploit chain at execution — protecting unpatched and end-of-life systems until the vendor patch is applied.