Node.js Vulnerability: CVE-2023-39333 - WebAssembly Module Code Injection Risk
Summary
UBUNTU-CVE-2023-39333: Maliciously crafted export names in an imported WebAssembly module can inject JavaScript code. Affects nodejs versions 12.22.5~dfsg-5ubuntu1 – 12.22.9~dfsg-1ubuntu3.6. No fix is published. How to fix ↓
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Background
Node.js is a popular JavaScript runtime built on Chrome's V8 JavaScript engine, enabling developers to build scalable network applications. It supports various features, including asynchronous event-driven programming, making it suitable for I/O-heavy workloads. However, a vulnerability has been identified in Node.js that affects its handling of WebAssembly modules, potentially allowing malicious code injection.
Vulnerability Detail
CVE-2023-39333 is a vulnerability that arises from the handling of maliciously crafted export names in imported WebAssembly modules. This flaw can lead to the injection of JavaScript code that may access data and functions outside the intended scope of the WebAssembly module. The risk is exacerbated when Node.js is executed with the '--experimental-wasm-modules' command line option, making it accessible to any active release line of Node.js. The CVSS score for this vulnerability is 5.3, indicating a medium severity level.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a temporary workaround, avoid using the '--experimental-wasm-modules' command line option when starting Node.js. This will prevent the exploitation of the vulnerability until a proper update can be applied.
Conclusion
CVE-2023-39333 poses a significant risk to Node.js users, particularly those utilizing WebAssembly modules. It is crucial to update to the latest patched versions and avoid using the experimental features until the update is applied. Regular monitoring through tools like Vulert can help maintain security against such vulnerabilities.
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FAQ
CVE-2023-39333 is a vulnerability in Node.js that allows for code injection through maliciously crafted WebAssembly modules.
You can use Vulert, which monitors open-source vulnerabilities in your software. Visit Vulert Scanner to check your application without needing to sign up.
As a temporary measure, refrain from using the '--experimental-wasm-modules' command line option to mitigate the risk of exploitation.
Exploitation of this vulnerability could allow attackers to execute arbitrary JavaScript code, potentially leading to data breaches or unauthorized access to sensitive information.
No, the vulnerability affects specific versions of Node.js that are run with the '--experimental-wasm-modules' option. Always ensure you are using an updated version.
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