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

CVE-2021-4279

High
9.8/10

Summary

A vulnerability was found in Starcounter-Jack JSON-Patch prior to 3.1.1 and is classified as problematic. The manipulation leads to improperly controlled modification of object prototype attributes ('prototype pollution'). The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. It is recommended to upgrade the affected component. VDB-216778 is the identifier assigned to this vulnerability.

  • 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