Denial of Service Vulnerability in lua-http Package: CVE-2023-4540
Summary
UBUNTU-CVE-2023-4540: Improper Handling of Exceptional Conditions vulnerability in Daurnimator lua-http library allows Excessive Allocation and a denial of service (DoS) attack to be executed by sending a properly crafted request to the serve... Affects lua-http versions 0.1-3. No fix is published. How to fix ↓
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Background
The lua-http package is a Lua library designed for HTTP client and server functionalities. It provides a simple and efficient way to handle HTTP requests and responses, making it a popular choice for developers building web applications in Lua. However, the package has been found to have a critical vulnerability that can lead to denial of service (DoS) attacks, affecting its reliability and performance.
Vulnerability Detail
CVE-2023-4540 is an improper handling of exceptional conditions vulnerability in the lua-http library. This flaw allows an attacker to send a specially crafted request that causes the program to enter an infinite loop, leading to excessive resource allocation and ultimately a denial of service. The vulnerability affects all versions of lua-http prior to commit ddab283, making it crucial for users to update to a patched version to mitigate the risk.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a temporary workaround, users can implement request validation to filter out potentially malicious requests that could trigger the infinite loop. This can be done by checking the request parameters and rejecting any that do not conform to expected formats.
Conclusion
The CVE-2023-4540 vulnerability in the lua-http package poses a significant risk of denial of service attacks. It is essential for users to update to the latest version of the package to protect their applications from potential exploitation. Utilizing tools like Vulert can further enhance security by providing real-time monitoring for vulnerabilities.
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FAQ
CVE-2023-4540 is a vulnerability in the lua-http library that allows for denial of service attacks through improper handling of exceptional conditions.
You can use Vulert's playground to check if your application is affected by this vulnerability by analyzing your manifest file without needing to sign up.
Exploitation of this vulnerability can lead to excessive resource allocation, causing the application to become unresponsive and potentially crash.
Yes, a patched version of lua-http is available. Users should update to the latest version to mitigate the risk.
Vulert is a tool that monitors and alerts for open-source vulnerabilities in software using just a manifest file. It helps developers ensure their applications are secure.
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