Critical HTTP Response Splitting Vulnerability in Apache2 Package
Summary
ALPINE-CVE-2024-42516: HTTP response splitting in the core of Apache HTTP Server allows an attacker who can manipulate the Content-Type response headers of applications hosted or proxied by the server can split the HTTP response. Affects apache2 versions < 2.4.64-r0. Fixed in 2.4.64-r0. How to fix ↓
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Background
Apache HTTP Server, commonly referred to as Apache, is one of the most widely used web server software applications. It is known for its robust performance, flexibility, and extensive features that support various web technologies. However, it is crucial to maintain its security, as vulnerabilities can lead to severe consequences for applications hosted on it. The specific vulnerability in question allows attackers to manipulate response headers, potentially compromising the integrity of web applications.
Vulnerability Detail
The vulnerability identified as CVE-2024-42516 is an HTTP response splitting issue within the core of the Apache HTTP Server. This flaw allows an attacker who can manipulate the Content-Type response headers of applications hosted or proxied by the server to split the HTTP response. This can lead to various attacks, including cache poisoning and cross-site scripting (XSS). The vulnerability was initially described as CVE-2023-38709, but the patch in Apache HTTP Server version 2.4.59 did not adequately address the issue. Users are strongly advised to upgrade to version 2.4.64, which rectifies this vulnerability.
How To Fix
Minimum fixed version
2.4.64-r0
This is the first release that contains the fix.
sudo apk add --upgrade apache2Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary measure, users can implement strict validation of Content-Type headers in their applications to mitigate the risk of response splitting until the upgrade can be performed. This may involve sanitizing user inputs and ensuring that only expected values are processed.
Conclusion
The CVE-2024-42516 vulnerability poses a significant risk to applications using the Apache HTTP Server. It is essential for users to upgrade to the patched version 2.4.64 to safeguard their applications against potential attacks. Implementing best practices for header validation can also help mitigate risks until the upgrade is completed.
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FAQ
CVE-2024-42516 is a critical vulnerability in the Apache HTTP Server that allows attackers to manipulate HTTP response headers, leading to potential security breaches.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in your software. By checking your manifest file like package-lock.json, you can identify if your application is affected by this vulnerability.
If exploited, this vulnerability can lead to cache poisoning, cross-site scripting (XSS), and other attacks that compromise the integrity of web applications.
Yes, a patch is available in Apache HTTP Server version 2.4.64. Users should upgrade to this version to fix the vulnerability.
You can upgrade your Apache2 package using the command 'apk upgrade apache2' in your terminal, ensuring that you have the latest security updates.
References
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