CVE-2012-0818: XXE Injection in RESTEasy
Summary
CVE-2012-0818: Exposure of Sensitive Information to an Unauthorized Actor in RESTEasy. Affects org.jboss.resteasy:resteasy-client versions < 2.3.1. Fixed in 2.3.1. How to fix ↓
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Background
RESTEasy is a Java framework that provides a set of tools and libraries for building RESTful web services. It is commonly used in Maven projects. The 'org.jboss.resteasy:resteasy-client' package is specifically impacted by this vulnerability. The package allows remote attackers to read arbitrary files by exploiting an XML external entity (XXE) injection attack. This vulnerability exists in versions prior to 2.3.1.
Vulnerability Detail
The vulnerability in RESTEasy arises from a lack of proper input validation when processing XML documents. An attacker can exploit this by injecting an external entity reference in a DOM document, leading to the disclosure of sensitive information. This can have serious consequences, as an unauthorized actor could gain access to confidential data stored on the server. The vulnerability has been assigned a severity level of MODERATE and is categorized under CWE-200.
How To Fix
Minimum fixed version
2.3.1
This is the first release that contains the fix.
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Workaround
If upgrading the package is not immediately feasible, a temporary workaround is to disable the processing of external entities in the XML parser configuration. This can be achieved by modifying the application's XML parser settings to disallow the resolution of external entities. The specific steps to implement this workaround may vary depending on the XML parser being used in the application.
Conclusion
In conclusion, the 'org.jboss.resteasy:resteasy-client' package is vulnerable to an XXE injection attack, which can result in the unauthorized disclosure of sensitive information. It is crucial to upgrade to version 2.3.1 or later to mitigate this vulnerability. If immediate upgrading is not possible, implementing the suggested workaround can provide temporary protection. For further assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
RESTEasy is a Java framework for building RESTful web services.
XXE injection is a type of attack where an attacker exploits a vulnerability in XML parsing to read arbitrary files or execute remote code.
The vulnerability allows remote attackers to read arbitrary files, potentially exposing sensitive information stored on the server.
To fix this vulnerability, upgrade the 'org.jboss.resteasy:resteasy-client' package to version 2.3.1 or later.
A temporary workaround is to disable the processing of external entities in the XML parser configuration.
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