Important: mod_http2 security update
Summary
ALSA-2024:1872: Important: mod_http2 security update. Affects mod_http2 versions < 1.15.19-5.el9_3.1. Fixed in 1.15.19-5.el9_3.1. How to fix ↓
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Background
The mod_http2 Apache httpd module is responsible for implementing the HTTP2 protocol (h2+h2c) on top of libnghttp2 for httpd 2.4 servers. This module allows for enhanced performance and efficiency in handling HTTP requests and responses.
Vulnerability Detail
The mod_http2 module is affected by a security vulnerability known as CONTINUATION frames DoS (CVE-2024-27316). This vulnerability can be exploited to launch denial-of-service attacks against servers running httpd 2.4 with mod_http2 enabled. An attacker can send specially crafted CONTINUATION frames, causing the server to consume excessive resources and potentially leading to service disruption.
How To Fix
Minimum fixed version
1.15.19-5.el9_3.1
This is the first release that contains the fix.
sudo dnf update mod_http2Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
There is no known workaround for this vulnerability. It is crucial to apply the security update as soon as possible to protect the server from potential attacks.
Conclusion
The mod_http2 module in Apache httpd 2.4 is vulnerable to a CONTINUATION frames DoS attack. To protect your server, it is crucial to update the mod_http2 package to version 1.15.19-5.el9_3.1 or later. For further support on vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for mod_http2 →
FAQ
The vulnerability allows attackers to launch denial-of-service attacks, potentially leading to service disruption and unavailability of the affected server.
You can use the Vulert Playground at Vulert Scanner to check if your application is affected by this vulnerability. Simply upload your manifest file (e.g., package-lock.json) and the tool will provide real-time alerts for open-source vulnerabilities.
At the time of this advisory, there are no known public exploits targeting this specific vulnerability. However, it is still crucial to apply the security update to mitigate any potential risks.
It is highly recommended to update the mod_http2 package to the latest version provided by the vendor. Manual patching can be complex and error-prone, and it is best to rely on official updates to ensure proper mitigation.
You can refer to the CVE page for CVE-2024-27316 for more details, including the impact, CVSS score, acknowledgments, and related information.
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