Critical HTTP Response Splitting Vulnerability in Apache2 Package
Summary
UBUNTU-CVE-2024-24795: HTTP Response splitting in multiple modules in Apache HTTP Server allows an attacker that can inject malicious response headers into backend applications to cause an HTTP desynchronization attack. Affects apache2 versions 2.4.6-2ubuntu2 – 2.4.7-1ubuntu4.9. No fix is published. How to fix ↓
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Background
Apache2 is a widely-used open-source web server software that enables the hosting of websites and applications. It is known for its flexibility, power, and extensive module support, allowing users to customize their server environment. However, it is susceptible to various vulnerabilities, including the recent HTTP response splitting issue, which can lead to significant security risks if not addressed promptly.
Vulnerability Detail
The vulnerability, identified as CVE-2024-24795, arises from HTTP response splitting in multiple modules of the Apache HTTP Server. This flaw allows an attacker who can inject malicious response headers into backend applications to execute an HTTP desynchronization attack. Such attacks can lead to unauthorized access, data leakage, or even complete server compromise. The severity of this vulnerability is rated with a CVSS score of 6.3, indicating a medium level of risk that requires immediate attention.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a temporary workaround, users can implement strict input validation on backend applications to prevent the injection of malicious headers. However, this is not a substitute for applying the necessary updates to the Apache2 package.
Conclusion
The HTTP response splitting vulnerability in the Apache2 package poses a significant risk to web applications. It is crucial for users to upgrade to the patched version to safeguard their systems. Utilizing tools like Vulert can help monitor for such vulnerabilities effectively.
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FAQ
CVE-2024-24795 is a vulnerability in the Apache HTTP Server that allows attackers to exploit HTTP response splitting, potentially leading to serious security breaches.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in real-time. By simply uploading your manifest file, such as package-lock.json, you can check for vulnerabilities without any installation.
The risks include unauthorized access to sensitive data, potential server compromise, and the ability to manipulate user sessions through HTTP desynchronization attacks.
Yes, a patch is available. Users should upgrade to Apache2 version 2.4.59 or later to mitigate this vulnerability.
If immediate upgrading is not possible, implement strict input validation on your backend applications as a temporary workaround until you can apply the patch.
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