Moderate Security Update for Ruby Package: Addressing Multiple Vulnerabilities
Summary
RLSA-2025:4493: Moderate: ruby:3.3 security update. Affects ruby versions < 0:3.3.8-4.module+el9.5.0+31850+530eecc9. Fixed in 0:3.3.8-4.module+el9.5.0+31850+530eecc9. How to fix ↓
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Background
Ruby is an extensible, interpreted, object-oriented scripting language known for its simplicity and productivity. It is widely used for web development and system management tasks. However, recent vulnerabilities have been identified that could potentially compromise its security, particularly in the net-imap, CGI, and uri libraries.
Vulnerability Detail
The vulnerabilities stem from issues in the Ruby libraries: net-imap is susceptible to a Denial of Service (DoS) attack due to memory exhaustion (CVE-2025-25186). The CGI library has a DoS vulnerability in CGI::Cookie.parse (CVE-2025-27219), and the uri library has a userinfo leakage issue in URI#join, URI#merge, and URI#+ (CVE-2025-27221). These vulnerabilities could lead to service disruptions and unauthorized access to sensitive information.
How To Fix
Minimum fixed version
0:3.3.8-4.module+el9.5.0+31850+530eecc9
This is the first release that contains the fix.
sudo dnf update rubyTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
If immediate updates cannot be applied, consider implementing rate limiting on your server to mitigate the risk of DoS attacks. Additionally, avoid using the vulnerable features in the affected libraries until the updates are applied.
Conclusion
In summary, the Ruby package and its related gems have been found to contain multiple vulnerabilities that could lead to significant security risks. It is crucial to update to the patched versions to ensure the safety of your applications. Utilize tools like Vulert for ongoing monitoring of vulnerabilities in your software.
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FAQ
The CVSS score for this vulnerability is 6.5, indicating a moderate level of risk.
The vulnerabilities could lead to Denial of Service attacks, memory exhaustion, and unauthorized access to sensitive user information.
You can use Vulert's playground at Vulert Scanner to check if your application is affected by this vulnerability without requiring any signup.
Implementing rate limiting on your server can help mitigate the risk of DoS attacks until you can apply the updates.
The Rocky Enterprise Software Foundation and Red Hat are responsible for providing the security updates for the affected packages.
References
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