js-yaml is a JavaScript YAML parser and dumper. From 5.0.0 before 5.2.1, YAML11_SCHEMA support for the !!omap tag in src/tag/sequence/omap.ts uses omapTag.addItem() to perform a linear duplicate-key scan on every insertion, causing O(n^2) CPU consumption when yaml.load() parses a crafted ordered-map document. This issue is fixed in version 5.2.1.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
High
Complete denial of service
CVSS Vector v3.1
Weakness Type (CWE)
Vulnerable Products 1
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Nodeca Js-Yaml
cpe:2.3:a:nodeca:js-yaml:*:*:*:*:*:node.js:*:*
|
5.0.0
|
5.2.1
|
References 3
https://github.com/nodeca/js-yaml/commit/39f3211a2f01b3c6982710cf21434ab7060ace…
security-advisories@github.com
https://github.com/nodeca/js-yaml/releases/tag/5.2.1
security-advisories@github.com
https://github.com/nodeca/js-yaml/security/advisories/GHSA-724g-mxrg-4qvm
security-advisories@github.com