Critical XML External Entity (XXE) Vulnerability in Apache Derby
Summary
CVE-2015-1832: XML external entity (XXE) vulnerability in the SqlXmlUtil code in Apache Derby before 10.12.1.1, when a Java Security Manager is not in place, allows context-dependent attackers to read arbitrary files or cause a denial... Affects derby versions < 10.13.1.1-1. Fixed in 10.13.1.1-1. How to fix ↓
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Background
Apache Derby is a relational database management system that is implemented in Java and provides a lightweight, embeddable database solution. It is designed for ease of use and is often utilized in applications requiring a simple database solution. However, prior to version 10.12.1.1, Derby is susceptible to an XML external entity (XXE) vulnerability, which can lead to severe security risks when the Java Security Manager is not in place.
Vulnerability Detail
The vulnerability arises from the SqlXmlUtil code in Apache Derby, which allows context-dependent attackers to exploit XML processing features. By crafting specific XML data, attackers can read arbitrary files on the server or cause a denial of service through resource consumption. This vulnerability is particularly dangerous as it can lead to unauthorized access to sensitive data and potential system crashes, making it critical to address.
How To Fix
Minimum fixed version
10.13.1.1-1
This is the first release that contains the fix.
sudo apt-get install --only-upgrade derbyTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
If upgrading is not immediately feasible, consider implementing a Java Security Manager to restrict the XML processing capabilities of your application. This can help mitigate the risk of exploitation until a proper upgrade can be performed.
Conclusion
The XML external entity (XXE) vulnerability in Apache Derby poses significant risks to applications using this database management system. It is crucial to upgrade to version 10.13.1.1 or later to mitigate these risks. Implementing a Java Security Manager can serve as a temporary workaround. Regular monitoring for vulnerabilities using tools like Vulert can help maintain application security.
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FAQ
An XML external entity (XXE) vulnerability allows attackers to interfere with the processing of XML data, potentially leading to unauthorized file access or denial of service.
You can use Vulert's playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
Exploitation of this vulnerability can lead to unauthorized access to sensitive files, data leakage, and denial of service attacks, severely impacting application integrity and availability.
Yes, implementing a Java Security Manager can help mitigate the risks associated with this vulnerability until an upgrade can be performed.
The CVSS score of this vulnerability is 9.1, indicating a critical level of severity.
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