Denial of Service Vulnerability in Ruby Package: CVE-2017-0900
Summary
ALPINE-CVE-2017-0900: RubyGems version 2.6.12 and earlier is vulnerable to maliciously crafted gem specifications to cause a denial of service attack against RubyGems clients who have issued a query command. Affects ruby versions < 2.4.2-r0. Fixed in 2.4.2-r0. How to fix ↓
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Background
Ruby is a dynamic, open-source programming language with a focus on simplicity and productivity. It has an elegant syntax that is natural to read and easy to write. RubyGems is the package manager for Ruby, allowing developers to easily manage libraries and dependencies. However, RubyGems versions 2.6.12 and earlier are vulnerable to a denial of service attack due to maliciously crafted gem specifications.
Vulnerability Detail
The vulnerability arises from RubyGems' handling of gem specifications, which can be exploited by attackers to create specially crafted gems that, when queried, can cause a denial of service for clients. This means that legitimate users may experience disruptions when trying to access or install gems, leading to potential downtime and loss of productivity. The technical aspect of this vulnerability lies in the way RubyGems processes gem metadata, which can be manipulated to overwhelm the system.
How To Fix
Minimum fixed version
2.4.2-r0
This is the first release that contains the fix.
sudo apk add --upgrade rubyTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
If immediate updating is not possible, consider temporarily disabling the use of RubyGems or limiting access to the gem repository until the update can be applied.
Conclusion
CVE-2017-0900 represents a significant vulnerability in RubyGems that can lead to denial of service attacks. It is crucial for users to update to the patched version to ensure the security and stability of their applications. Monitoring tools like Vulert can aid in identifying and managing such vulnerabilities effectively.
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FAQ
CVE-2017-0900 is a vulnerability in RubyGems that allows for denial of service attacks through malicious gem specifications.
Check your RubyGems version by running gem -v in your terminal. If it is 2.6.12 or earlier, it is affected.
The vulnerability can lead to service disruptions, making it difficult for users to install or access Ruby gems, which can affect application performance.
Yes, tools like Vulert can monitor your projects for open-source vulnerabilities using just a manifest file, alerting you in real-time.
Detailed information about CVE-2017-0900 can be found on security databases and advisories, as well as through the official RubyGems documentation.
References
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