CyberRota Analysis
AI-GeneratedThe multer middleware for handling multipart/form-data in Node.js versions prior to 2.3.0 is vulnerable to a denial-of-service attack due to improper handling of aborted or truncated uploads, which can lead to resource exhaustion from leaked file descriptors. This issue allows remote attackers to exploit upload routes, potentially causing significant disruption to services. Organizations using multer for file uploads should prioritize upgrading to version 2.3.0 to mitigate this risk.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
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Original NVD Description
multer is a middleware for handling multipart/form-data in Node.js. In version 2.2.0, when a disk-backed upload is aborted or truncated before the write stream finishes, multer's disk storage engine removes the visible file but does not close the underlying write file descriptor, leaving a deleted but still open descriptor. A remote attacker able to reach an upload route using the built-in disk storage can send repeated aborted or malformed multipart uploads, each one leaking a file descriptor and retaining disk blocks until the process exits, which can exhaust resources and cause a denial of service. The issue is fixed in multer 2.3.0, which closes the destination write stream on abnormal source termination and defers cleanup until the stream has closed. Upgrade to multer 2.3.0 to remediate.
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