CVE-2021-44906
Description
An Uncontrolled Resource Consumption flaw was found in minimist. The original fix for CVE-2020-7598 was incomplete as it was still possible to bypass in some cases. This flaw (CVE-2021-44906) allows an attacker to trick the library into adding or modifying the properties of Object.prototype, using a constructor or proto payload, resulting in prototype pollution and loss of confidentiality, availability, and integrity.
Statement
As minimist is an argument parsing module for nodejs, exploitation of this vulnerability requires an attacker to influence which arguments are passed to nodejs when running a script. Red Hat products and services are designed in such a way that gaining this ability is not trivial. Additionally, the impact is limited by only enabling the pollution of functions, and not all generic objects.
Within Red Hat Satellite 6 this flaw has been rated as having a security impact of Low. It is not currently planned to be addressed there, as the minimist library is only included in the -doc subpackage and is part of test fixtures that are not in the execution path used by the rabl gem.
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 | 3.1 | 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 | None | 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:N/I:L/A:N
NVD: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Understanding the Weakness (CWE)
Confidentiality,Integrity,Availability
Technical Impact: Read Application Data; Modify Application Data
This weakness is usually exploited by using a special attribute of objects called proto, constructor, or prototype. Such attributes give access to the object prototype. An attacker can inject attributes that are used in other components by adding or modifying attributes of an object prototype. This creates attributes that exist on every object, or replace critical attributes with malicious ones. This can be problematic if the product depends on existence or non-existence of certain attributes, or uses pre-defined attributes of the object prototype (such as hasOwnProperty, toString, or valueOf).
Availability
Technical Impact: DoS: Crash, Exit, or Restart
An attacker can override existing attributes with ones that have incompatible type, which may lead to a crash.
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