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Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

CVE-2020-28462

High
9.8/10

Summary

A Prototype Pollution vulnerability in the ion-parser package affects all versions. If an attacker submits a malicious INI file to an application that parses it with `parse`, they will pollute the prototype on the application. This can be exploited further depending on the context.

  • LOW
  • NETWORK
  • HIGH
  • UNCHANGED
  • NONE
  • NONE
  • HIGH
  • HIGH

CWE-1321 - Prototype Pollution

Prototype pollution is one of the lesser-known vulnerabilities. It allows attackers to abuse the rules of JavaScript by injecting properties into the general object “Object” in JS. Modifying the prototype of “Object” affects the behavior of all objects in the entire app, potentially resulting in denial of service, arbitrary code execution, cross-site scripting, etc.

References

Advisory Timeline

  • Published