Description (CNA)
multer is a middleware for handling multipart/form-data in Node.js. A small multipart request with two specially crafted text field names can make multer's field parser synchronously iterate a maximum-length sparse array, blocking the event loop so the process cannot handle other requests. A large numeric array index in the first field allocates a maximum-length sparse array, and a second field with a non-numeric key then triggers a full-length iteration inside the append-field dependency. All versions before 2.3.0 are affected, and this is a remotely triggerable denial of service. multer 2.3.0 adds an opt-in fieldArrayIndexLimit option that rejects oversized array indexes. Upgrade to multer 2.3.0 and set limits.fieldArrayIndexLimit to the largest array index your application needs to remediate.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| multer / multer | affected 0 before 2.3.0; unaffected 2.3.0 |
CWE
CWE-400
References
- https://github.com/expressjs/multer/security/advisories/GHSA-535w-7cp7-47q4
- https://cna.openjsf.org/security-advisories.html
ADP enrichment
No English description supplied.
No references supplied.