Description (CNA)
Impact: multer versions 1.0.0 through 2.1.1 and 3.0.0-alpha.1 are vulnerable to a Denial of Service via deeply nested field names in multipart form data. The append-field dependency parses bracket notation in field names with no limit on nesting depth, allowing an attacker to force allocation of deeply nested object structures that consume CPU and memory. A single HTTP request with a crafted multipart body is sufficient to exploit this. Patches: Users should upgrade to multer 2.2.0 (2.x line) or 3.0.0-alpha.2 (3.x prerelease) and configure the new limits.fieldNestingDepth option to the minimum depth their application requires. Workarounds: Set limits.fields to a reasonable value to reduce the number of fields an attacker can send per request. This does not fully mitigate the issue but limits the impact.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| multer / multer | affected 1.0.0 before 2.2.0; unaffected 2.2.0; affected 3.0.0-alpha.1 before 3.0.0-alpha.2; unaffected 3.0.0-alpha.2 |
CWE
CWE-400
References
- https://github.com/expressjs/multer/security/advisories/GHSA-72gw-mp4g-v24j
- https://cna.openjsf.org/security-advisories.html
ADP enrichment
No English description supplied.
No references supplied.