Heap-Based Buffer Overflow in FreeXL Package: CVE-2017-2924
Summary
DEBIAN-CVE-2017-2924: An exploitable heap-based buffer overflow vulnerability exists in the read_legacy_biff function of FreeXL 1.0.3. Affects freexl versions < 1.0.4-1. Fixed in 1.0.4-1. How to fix ↓
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Background
FreeXL is an open-source library designed for reading Excel files in the XLS format. It provides a simple API for developers to integrate Excel file reading capabilities into their applications. The library is widely used due to its lightweight nature and ease of use. However, it has been found to be vulnerable to a heap-based buffer overflow, which can lead to severe security implications.
Vulnerability Detail
An exploitable heap-based buffer overflow vulnerability exists in the read_legacy_biff function of FreeXL version 1.0.3. This vulnerability arises when a specially crafted XLS file is processed, leading to memory corruption and potentially allowing an attacker to execute arbitrary code remotely. The risk is significant as it can lead to unauthorized access and control over affected systems.
How To Fix
Minimum fixed version
1.0.4-1
This is the first release that contains the fix.
sudo apt-get install --only-upgrade freexlTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, avoid opening untrusted or unknown XLS files until the package is updated. Additionally, consider implementing file validation checks to ensure that only safe files are processed.
Conclusion
The FreeXL library has a critical vulnerability (CVE-2017-2924) that can lead to severe security risks if not addressed. Users are urged to update to the patched version 1.0.4-1 or later to protect their systems from potential attacks. Implementing workarounds and monitoring for vulnerabilities using tools like Vulert can further enhance security.
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FAQ
CVE-2017-2924 is a unique identifier for a specific vulnerability in the FreeXL library that allows for heap-based buffer overflow, potentially leading to remote code execution.
You can check if your application is affected by using the Vulert playground at Vulert Scanner, which allows you to monitor and alert for open-source vulnerabilities without requiring installation.
Failing to address this vulnerability can expose your system to remote code execution attacks, allowing attackers to gain unauthorized access and control over your application and data.
Yes, avoid opening untrusted XLS files and implement file validation checks to mitigate the risk until the package is updated.
More information about FreeXL can be found on its official repository or documentation pages, which provide details on its functionality and usage.
References
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