js-yaml is a JavaScript YAML parser and dumper. From 5.0.0 before 5.2.0, when merge keys are enabled, js-yaml can spend quadratic CPU time parsing a document whose size grows only linearly when a chain of mappings uses merge keys where each mapping merges the previous one. This issue is fixed in version 5.2.0.
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
|
5.2.0
|
References 3
https://github.com/nodeca/js-yaml/commit/3105455b81dee69e0fd36e09ac0b2ccfdb54ad…
security-advisories@github.com
https://github.com/nodeca/js-yaml/releases/tag/5.2.0
security-advisories@github.com
https://github.com/nodeca/js-yaml/security/advisories/GHSA-g796-fgmg-93mv
security-advisories@github.com