Denial of Service Vulnerability in node-socket.io-parser: CVE-2020-36049
Summary
UBUNTU-CVE-2020-36049: socket.io-parser before 3.4.1 allows attackers to cause a denial of service (memory consumption) via a large packet because a concatenation approach is used. Affects node-socket.io-parser versions 2.3.1-1. No fix is published. How to fix ↓
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Background
node-socket.io-parser is a package used in Node.js applications for parsing socket.io messages. It facilitates real-time communication between clients and servers, making it essential for applications that require instant data exchange. The package is widely utilized in various web applications, but it has been found to be vulnerable to a denial of service (DoS) attack due to its handling of large packets.
Vulnerability Detail
The vulnerability, identified as CVE-2020-36049, arises from the use of a concatenation approach in the socket.io-parser before version 3.4.1. Attackers can exploit this flaw by sending large packets, leading to excessive memory consumption and potentially crashing the application. This vulnerability poses a significant risk, especially for applications that rely heavily on real-time data processing, as it can disrupt service availability and degrade user experience.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a temporary workaround, you can implement input validation to limit the size of packets being processed by the application. This can help mitigate the risk of memory consumption until the package is updated.
Conclusion
The CVE-2020-36049 vulnerability in the node-socket.io-parser package poses a significant risk of denial of service due to improper handling of large packets. It is crucial to update to the patched version to mitigate this risk and ensure the stability of applications relying on this package.
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FAQ
CVE-2020-36049 is a vulnerability in the node-socket.io-parser package that allows attackers to cause a denial of service through memory consumption by sending large packets.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
The main consequence is the potential for denial of service, which can lead to application crashes and unavailability, affecting user experience.
Yes, a patch is available in version 3.4.1 and later of the node-socket.io-parser package.
If an immediate update is not possible, implement input validation to limit packet sizes as a temporary workaround.
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