Inefficient Regular Expression Complexity in node-fetch: CVE-2022-2596
Summary
UBUNTU-CVE-2022-2596: Inefficient Regular Expression Complexity in GitHub repository node-fetch/node-fetch prior to 3.2.10. Affects node-fetch versions 1.7.3-1 – 1.7.3-1ubuntu0.1~esm1. No fix is published. How to fix ↓
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Background
node-fetch is a lightweight module that enables HTTP requests in Node.js, providing a simple interface for making network requests. It is widely used in various applications for fetching resources from the web. However, certain versions of node-fetch are vulnerable to an inefficient regular expression complexity issue, which can lead to performance degradation and potential denial of service in applications utilizing this package.
Vulnerability Detail
The vulnerability, identified as CVE-2022-2596, arises from inefficient regular expression handling in node-fetch versions prior to 3.2.10. This flaw can be exploited by attackers to craft specific inputs that cause excessive backtracking in the regex engine, leading to significant performance issues or even application crashes. The vulnerability is particularly concerning as it can be triggered by untrusted input, making it a potential vector for denial-of-service attacks.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
If immediate updating is not feasible, consider implementing input validation to sanitize any user inputs that may interact with the regular expressions in node-fetch. This can help mitigate the risk of exploitation until the package can be updated.
Conclusion
CVE-2022-2596 represents a significant vulnerability in the node-fetch package, which can lead to performance issues and denial-of-service attacks. Users are strongly encouraged to update to the latest version to protect their applications. Additionally, utilizing input validation can serve as a temporary measure to reduce risk.
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FAQ
CVE-2022-2596 is a vulnerability in node-fetch that involves inefficient regular expression complexity, potentially leading to performance degradation.
Versions of node-fetch prior to 3.2.10 are affected by this vulnerability.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
Exploitation of this vulnerability can lead to denial-of-service attacks, causing applications to slow down or crash.
Yes, implementing input validation to sanitize user inputs can help mitigate the risk until an update can be performed.
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