Code Evaluation (RoR)
Severity:
Critical
Summary
An attacker can send a specially crafted XML request to the application containing an embedded YAML-encoded object. Rails will parse the XML and load the objects from YAML. In the process, arbitrary Ruby code sent by the attacker may be executed (depending on the type and structure of the injected objects).
Impact
An attacker can execute arbitrary Ruby on Rails (RoR) code on the system. The attacker may also be able to execute arbitrary system commands.
Remediation
Upgrade to version 2.3.15, 3.0.19, 3.1.10, 3.2.11, or higher, to address this vulnerability. Additionally, the vendor has released a patch to address this issue, or users may opt to apply the following temporary workaround.
- Disable XML entirely
- Remove YAML / Symbol support from XML parsing
Required Skills for Successful Exploitation
Actions To Take
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