CVE-2011-4103: Django Piston YAML Deserialization Arbitrary Code Execution
Summary
CVE-2011-4103: emitters.py in Django Piston before 0.2.3 and 0.2.x before 0.2.2.1 does not properly deserialize YAML data, which allows remote attackers to execute arbitrary Python code via vectors related to the yaml.load method. Affects django-piston versions < 0.2.3. Fixed in 0.2.3. How to fix ↓
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Background
Django Piston is a Python package available on PyPI that provides a framework for building RESTful APIs. It allows developers to easily create, publish, and consume APIs using the Django web framework. The package is widely used in Python applications for API development.
Vulnerability Detail
The vulnerability, identified as CVE-2011-4103, affects Django Piston versions before 0.2.3 and 0.2.x before 0.2.2.1. The issue lies in the 'emitters.py' module, where YAML data is deserialized improperly. This flaw enables remote attackers to execute arbitrary Python code by exploiting vulnerabilities related to the 'yaml.load' method. An attacker can craft malicious YAML data that, when processed by Django Piston, triggers the execution of arbitrary code on the server. This can lead to unauthorized access, data leakage, or even complete compromise of the affected system.
How To Fix
Minimum fixed version
0.2.3
This is the first release that contains the fix.
pip install --upgrade "django-piston==0.2.3"Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
If upgrading Django Piston is not immediately feasible, a possible workaround is to disable the use of YAML data in the application. By avoiding the processing of YAML payloads, the risk of code execution through this vulnerability can be mitigated. However, this workaround may not be suitable for applications that rely on YAML data for legitimate purposes.
Conclusion
The vulnerability in Django Piston's YAML deserialization can lead to the execution of arbitrary code, posing significant risks to the security of affected systems. It is crucial to upgrade to the latest version of Django Piston (0.2.3 or later) to address this vulnerability. Alternatively, disabling the use of YAML data can serve as a temporary workaround. For further assistance or support in vulnerability remediation, please contact DevNack.com.
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FAQ
Django Piston is a Python package that provides a framework for building RESTful APIs using the Django web framework.
Versions of Django Piston before 0.2.3 and 0.2.x before 0.2.2.1 are affected by this vulnerability.
An attacker can exploit this vulnerability by crafting malicious YAML data that triggers the execution of arbitrary Python code when processed by Django Piston.
The consequences of this vulnerability include unauthorized access, data leakage, and potential compromise of the affected system.
A possible workaround is to disable the use of YAML data in the application to mitigate the risk of code execution. However, this may not be suitable for applications that rely on YAML data for legitimate purposes.
