Critical Memory Corruption and Command Injection Vulnerabilities in Ruby Package
Summary
RLSA-2026:50778: Important: ruby security, bug fix, and enhancement update. Affects ruby versions < 0:3.3.12-14.el10_2. Fixed in 0:3.3.12-14.el10_2. How to fix ↓
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Background
Ruby is an extensible, interpreted, object-oriented scripting language widely used for web development and system management tasks. It provides robust features for processing text files and automating system operations. However, recent vulnerabilities have been identified that could compromise the security of applications utilizing Ruby, particularly in versions prior to 3.3.12-14.el10_2.
Vulnerability Detail
The vulnerabilities stem from multiple issues within the Ruby package, particularly in the Net::IMAP module. These include a memory corruption vulnerability via buffer overflow in Zlib::GzipReader, arbitrary command injection through unvalidated input, and denial of service attacks due to improper input validation. The ramifications of these vulnerabilities can lead to unauthorized access, data corruption, and service disruptions, making it critical for users to address them promptly.
How To Fix
Minimum fixed version
0:3.3.12-14.el10_2
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
As a temporary measure, users can limit the input to the Net::IMAP module and avoid processing untrusted data until the package is updated. Additionally, implementing input validation checks can help reduce the risk of command injection attacks.
Conclusion
In summary, the identified vulnerabilities in the Ruby package pose significant risks to applications utilizing it. Users are strongly encouraged to update to the latest patched version to safeguard against potential attacks. Additionally, utilizing tools like Vulert can help monitor for vulnerabilities in real-time.
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FAQ
The CVSS score of this vulnerability is 7.3, indicating a high level of severity.
Versions of Ruby prior to 3.3.12-14.el10_2 are affected by these vulnerabilities.
Potential attacks include memory corruption, arbitrary command injection, and denial of service, which can compromise application integrity and availability.
You can use the Vulert platform to monitor and alert for open-source vulnerabilities in your software. Visit Vulert Scanner to check your application without requiring signup.
If an immediate update is not possible, implement strict input validation and limit the use of the Net::IMAP module to mitigate risks until the update can be performed.
References
Related vulnerabilities
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