Remote Code Execution Vulnerability in Apache Commons FileUpload (libcommons-fileupload-java)
Summary
DEBIAN-CVE-2016-1000031: Apache Commons FileUpload before 1.3.3 DiskFileItem File Manipulation Remote Code Execution. Affects libcommons-fileupload-java versions 1.4-1 – 1.5-1.1. No fix is published. How to fix ↓
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Background
Apache Commons FileUpload is a popular library used in Java applications for handling file uploads. It provides a simple API for processing file uploads in web applications, allowing developers to easily manage file input from users. However, prior to version 1.3.3, the library contained a vulnerability that could allow attackers to manipulate file paths, leading to potential remote code execution.
Vulnerability Detail
The vulnerability, identified as CVE-2016-1000031, arises from improper handling of file paths in the DiskFileItem class of Apache Commons FileUpload versions prior to 1.3.3. This flaw allows an attacker to craft a malicious file upload request that could lead to arbitrary code execution on the server. The implications of this vulnerability are severe, as it could allow unauthorized access to sensitive data or complete control over the affected server.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a temporary workaround, you can implement strict validation on file uploads, ensuring that only files with specific extensions are accepted and that the file paths are sanitized before processing. However, this is not a substitute for applying the patch.
Conclusion
The Apache Commons FileUpload library has a critical vulnerability that could lead to remote code execution. It is crucial for users of this library to update to the patched version to mitigate risks. Implementing workarounds can provide temporary relief, but updating the package is the best long-term solution.
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FAQ
CVE-2016-1000031 is a vulnerability in Apache Commons FileUpload that allows for remote code execution due to improper file path handling.
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If exploited, this vulnerability can lead to unauthorized access to sensitive data and potentially full control over the affected server.
Yes, the patch is available in version 1.3.3 and later of the libcommons-fileupload-java package.
If immediate updates are not possible, implement strict validation and sanitization of file uploads as a temporary workaround.
References
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