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

CVE-2021-23771

Medium
6.5/10

Summary

Version 1.3.3 of notevil and all versions of argencoders-notevil are vulnerable to Sandbox Escape leading to Prototype pollution. The packages fail to restrict access to the main context, allowing an attacker to add or modify an object's prototype.

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

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