Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
The product receives input from an upstream component that specifies attributes that are to be initialized or updated in an object, but it does not properly control modifications of attributes of the object prototype.
Impact: Read Application DataModify 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).
Impact: DoS: Crash, Exit, or Restart
An attacker can override existing attributes with ones that have incompatible type, which may lead to a crash.
Effectiveness: High
Effectiveness: High
Strategy: Input Validation
Effectiveness: Limited
Effectiveness: High
Effectiveness: Moderate
ID : DX-206
This function sets object attributes based on a dot-separated path.Code Example:
javascriptCode Example:
javascriptCode Example:
javascript// Ignore attributes which resolve to object prototype* if (attr === "proto" || attr === "constructor" || attr === "prototype") {
javascript