CVE-2019-19919
Description
A flaw was found in nodejs-handlebars, where it is vulnerable to Prototype Pollution leading to Remote Code Execution. Templates may alter an Object's proto and defineGetter properties, which allows an attacker to execute arbitrary code through crafted payloads. The highest threat from this vulnerability is to confidentiality and integrity.
Statement
Red Hat Quay includes Handlebars.js as a development dependency. It does not use Handlebars.js at runtime to process templates so it has been given a low impact rating.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 4.2 | 9.8 | N/A |
| Attack Vector | Network | Network | N/A |
| Attack Complexity | High | Low | N/A |
| Privileges Required | Low | None | N/A |
| User Interaction | None | None | N/A |
| Scope | Unchanged | Unchanged | N/A |
| Confidentiality | Low | High | N/A |
| Integrity Impact | Low | High | N/A |
| Availability Impact | None | High | N/A |
Vector
Red Hat: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
NVD: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Red Hat CVSS v3 Score Explanation
Prototype pollution relies on a user having the ability to merge new methods into an existing object. An attacker would have to know how those methods were going to be used by the application, so an attack is difficult to perform.
Understanding the Weakness (CWE)
Integrity
Technical Impact: Modify Application Data
Common data types that are attacked are environment variables, web application parameters, and HTTP headers.
Integrity
Technical Impact: Unexpected State
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