Denial of Service Vulnerability in Ruby Rack Package: CVE-2024-26141
Summary
UBUNTU-CVE-2024-26141: Rack is a modular Ruby web server interface. Affects ruby-rack versions < 1.5.2-3+deb8u3ubuntu1~esm8. Fixed in 1.5.2-3+deb8u3ubuntu1~esm8. How to fix ↓
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Background
Ruby Rack is a modular web server interface for Ruby applications, enabling developers to build web applications and services. It provides a standard interface between web servers and Ruby frameworks, allowing for flexibility and modularity in web application development. The package is widely used in Ruby on Rails applications and other Ruby-based web frameworks. However, it has been identified to have a vulnerability that can lead to denial of service under certain conditions.
Vulnerability Detail
The vulnerability, identified as CVE-2024-26141, arises from the way Rack handles Range headers. Specifically, carefully crafted Range headers can cause the server to respond with unexpectedly large responses. This can lead to denial of service, as the server may become overwhelmed by the large response size. The issue affects applications using the Rack::File middleware or the Rack::Utils.byte_ranges methods, which are common in Rails applications. The vulnerability has a CVSS score of 5.8, indicating a medium severity level.
How To Fix
Minimum fixed version
1.5.2-3+deb8u3ubuntu1~esm8
This is the first release that contains the fix.
sudo apt-get install --only-upgrade ruby-rackTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, you can limit the size of responses generated by your application or implement rate limiting to mitigate the impact of potential denial of service attacks. Additionally, consider reviewing and sanitizing the Range headers in incoming requests to prevent exploitation.
Conclusion
The CVE-2024-26141 vulnerability in the Ruby Rack package poses a risk of denial of service due to improper handling of Range headers. It is crucial to update to the patched versions to mitigate this risk. Users should also consider implementing workarounds until they can apply the necessary updates.
See every vulnerability recorded for ruby-rack →
FAQ
CVE-2024-26141 is a vulnerability in the Ruby Rack package that can lead to denial of service due to improperly handled Range headers.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
If exploited, this vulnerability can cause your server to respond with excessively large data, potentially overwhelming it and leading to service outages.
Yes, patched versions of the Ruby Rack package are available for various Ubuntu LTS releases. It is recommended to update to the latest fixed version.
If immediate updates are not possible, consider implementing workarounds such as limiting response sizes and sanitizing incoming requests.
Related vulnerabilities
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