multer vulnerable to Denial of Service via orphaned disk writes on aborted uploads

[ Description ]Official description

multer is a Node.js middleware for handling multipart/form-data uploads. In versions 2.2.0 through 2.3.0, when a request using disk storage is aborted mid-upload, file writes that complete after multer has already run its abort cleanup are not removed, so each aborted upload can leave an orphaned file on disk. A remote unauthenticated attacker can repeatedly start and abort uploads to accumulate orphaned files and exhaust disk space, causing a denial of service. The issue is fixed in multer 2.4.0, and users should upgrade to 2.4.0 or later.

[ Fixes ]Fixes and patches

• multer 2.4.0Fixed version · GitHub Advisories · npm package multer: upgrade to 2.4.0 or later (affected >= 2.2.0, < 2.4.0)

[ Packages ]Affected open-source packages

• multer npmAffected >= 2.2.0, < 2.4.0 · fixed in 2.4.0 · GHSA-3pph-fpjx-jg34

[ References ]References

• github.com/expressjs/multer/security/advisories/GHSA-3pph-fpjx-jg34
• cna.openjsf.org/security-advisories.html