CVE-2017-14868: XXE vulnerability in Restlet Framework
Summary
CVE-2017-14868: Restlet Framework Ja-rs extension is vulnerable to XXE when using SimpleXMLProvider. Affects org.restlet.jse:org.restlet.ext.jaxrs versions < 2.3.11. Fixed in 2.3.11. How to fix ↓
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Background
The Restlet Framework is a popular Java-based framework for building RESTful web services. It provides a set of APIs and tools to simplify the development of RESTful applications. The framework includes various extensions, including the Jax-rs extension, which allows developers to build RESTful APIs using the JAX-RS specification. One of the components used in the framework is the SimpleXMLProvider, which is responsible for handling XML data in REST API requests and responses.
Vulnerability Detail
The Restlet Framework, when using the SimpleXMLProvider, is vulnerable to an XML External Entity (XXE) attack. This vulnerability allows remote attackers to access arbitrary files on the server by sending a specially crafted XML payload in a REST API HTTP request. By exploiting this vulnerability, an attacker can read sensitive files, such as configuration files or database credentials, potentially leading to further compromise of the system. The vulnerability affects versions of the Restlet Framework before 2.3.11.
How To Fix
Minimum fixed version
2.3.11
This is the first release that contains the fix.
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Workaround
A possible workaround for this vulnerability is to disable the use of the SimpleXMLProvider in the Restlet Framework configuration. This can be done by removing or commenting out the corresponding configuration entry in the project's configuration file. However, this workaround may impact the functionality of the application if it relies on XML data processing. It is recommended to consult the Restlet Framework documentation or seek assistance from the development team to determine the best course of action.
Conclusion
The Restlet Framework is vulnerable to an XXE attack when using the SimpleXMLProvider. This can allow remote attackers to access arbitrary files on the server, potentially leading to unauthorized disclosure of sensitive information. To mitigate this vulnerability, it is recommended to upgrade to version 2.3.11 or later of the Restlet Framework. Alternatively, developers can disable the use of the SimpleXMLProvider or implement additional input validation and filtering. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
An XML External Entity (XXE) attack is a type of security vulnerability that allows an attacker to exploit the processing of XML data by an application. By including specially crafted XML entities, an attacker can read arbitrary files on the server or perform other malicious actions.
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The XXE vulnerability in the Restlet Framework can allow remote attackers to access sensitive files on the server. This can lead to unauthorized disclosure of sensitive information, such as configuration files or database credentials, and potentially enable further attacks on the system.
Yes, a fix for this vulnerability is available in version 2.3.11 of the Restlet Framework. It is recommended to upgrade to this version or later to mitigate the risk of XXE attacks.
A possible workaround is to disable the use of the SimpleXMLProvider in the Restlet Framework configuration. However, this may impact the functionality of the application. It is recommended to consult the Restlet Framework documentation or seek assistance from the development team for guidance on the best approach.
