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tools: add avoid-prototype-pollution lint rule
#43308
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nodejs-github-bot
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aduh95:avoid-prototype-pollution-lint
Jun 11, 2022
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,147 @@ | ||
| 'use strict'; | ||
|
|
||
| const common = require('../common'); | ||
| if ((!common.hasCrypto) || (!common.hasIntl)) { | ||
| common.skip('ESLint tests require crypto and Intl'); | ||
| } | ||
|
|
||
| common.skipIfEslintMissing(); | ||
|
|
||
| const RuleTester = require('../../tools/node_modules/eslint').RuleTester; | ||
| const rule = require('../../tools/eslint-rules/avoid-prototype-pollution'); | ||
|
|
||
| new RuleTester({ | ||
| parserOptions: { ecmaVersion: 2022 }, | ||
| }) | ||
| .run('property-descriptor-no-prototype-pollution', rule, { | ||
| valid: [ | ||
| 'ObjectDefineProperties({}, {})', | ||
| 'ObjectCreate(null, {})', | ||
| 'ObjectDefineProperties({}, { key })', | ||
| 'ObjectCreate(null, { key })', | ||
| 'ObjectDefineProperties({}, { ...spread })', | ||
| 'ObjectCreate(null, { ...spread })', | ||
| 'ObjectDefineProperties({}, { key: valueDescriptor })', | ||
| 'ObjectCreate(null, { key: valueDescriptor })', | ||
| 'ObjectDefineProperties({}, { key: { ...{}, __proto__: null } })', | ||
| 'ObjectCreate(null, { key: { ...{}, __proto__: null } })', | ||
| 'ObjectDefineProperties({}, { key: { __proto__: null } })', | ||
| 'ObjectCreate(null, { key: { __proto__: null } })', | ||
| 'ObjectDefineProperties({}, { key: { __proto__: null, enumerable: true } })', | ||
| 'ObjectCreate(null, { key: { __proto__: null, enumerable: true } })', | ||
| 'ObjectDefineProperties({}, { key: { "__proto__": null } })', | ||
| 'ObjectCreate(null, { key: { "__proto__": null } })', | ||
| 'ObjectDefineProperties({}, { key: { \'__proto__\': null } })', | ||
| 'ObjectCreate(null, { key: { \'__proto__\': null } })', | ||
| 'ObjectDefineProperty({}, "key", ObjectCreate(null))', | ||
| 'ReflectDefineProperty({}, "key", ObjectCreate(null))', | ||
| 'ObjectDefineProperty({}, "key", valueDescriptor)', | ||
| 'ReflectDefineProperty({}, "key", valueDescriptor)', | ||
| 'ObjectDefineProperty({}, "key", { __proto__: null })', | ||
| 'ReflectDefineProperty({}, "key", { __proto__: null })', | ||
| 'ObjectDefineProperty({}, "key", { __proto__: null, enumerable: true })', | ||
| 'ReflectDefineProperty({}, "key", { __proto__: null, enumerable: true })', | ||
| 'ObjectDefineProperty({}, "key", { "__proto__": null })', | ||
| 'ReflectDefineProperty({}, "key", { "__proto__": null })', | ||
| 'ObjectDefineProperty({}, "key", { \'__proto__\': null })', | ||
| 'ReflectDefineProperty({}, "key", { \'__proto__\': null })', | ||
| ], | ||
| invalid: [ | ||
| { | ||
| code: 'ObjectDefineProperties({}, ObjectGetOwnPropertyDescriptors({}))', | ||
| errors: [{ message: /prototype pollution/ }], | ||
| }, | ||
| { | ||
| code: 'ObjectCreate(null, ObjectGetOwnPropertyDescriptors({}))', | ||
| errors: [{ message: /prototype pollution/ }], | ||
| }, | ||
| { | ||
| code: 'ObjectDefineProperties({}, { key: {} })', | ||
| errors: [{ message: /null-prototype/ }], | ||
| }, | ||
| { | ||
| code: 'ObjectCreate(null, { key: {} })', | ||
| errors: [{ message: /null-prototype/ }], | ||
| }, | ||
| { | ||
| code: 'ObjectDefineProperties({}, { key: { [void 0]: { ...{ __proto__: null } } } })', | ||
| errors: [{ message: /null-prototype/ }], | ||
| }, | ||
| { | ||
| code: 'ObjectCreate(null, { key: { [void 0]: { ...{ __proto__: null } } } })', | ||
| errors: [{ message: /null-prototype/ }], | ||
| }, | ||
| { | ||
| code: 'ObjectDefineProperties({}, { key: { __proto__: Object.prototype } })', | ||
| errors: [{ message: /null-prototype/ }], | ||
| }, | ||
| { | ||
| code: 'ObjectCreate(null, { key: { __proto__: Object.prototype } })', | ||
| errors: [{ message: /null-prototype/ }], | ||
| }, | ||
| { | ||
| code: 'ObjectDefineProperties({}, { key: { [`__proto__`]: null } })', | ||
| errors: [{ message: /null-prototype/ }], | ||
| }, | ||
| { | ||
| code: 'ObjectCreate(null, { key: { [`__proto__`]: null } })', | ||
| errors: [{ message: /null-prototype/ }], | ||
| }, | ||
| { | ||
| code: 'ObjectDefineProperties({}, { key: { enumerable: true } })', | ||
| errors: [{ message: /null-prototype/ }], | ||
| }, | ||
| { | ||
| code: 'ObjectCreate(null, { key: { enumerable: true } })', | ||
| errors: [{ message: /null-prototype/ }], | ||
| }, | ||
| { | ||
| code: 'ObjectDefineProperty({}, "key", {})', | ||
| errors: [{ message: /null-prototype/ }], | ||
| }, | ||
| { | ||
| code: 'ReflectDefineProperty({}, "key", {})', | ||
| errors: [{ message: /null-prototype/ }], | ||
| }, | ||
| { | ||
| code: 'ObjectDefineProperty({}, "key", ObjectGetOwnPropertyDescriptor({}, "key"))', | ||
| errors: [{ message: /prototype pollution/ }], | ||
| }, | ||
| { | ||
| code: 'ReflectDefineProperty({}, "key", ObjectGetOwnPropertyDescriptor({}, "key"))', | ||
| errors: [{ message: /prototype pollution/ }], | ||
| }, | ||
| { | ||
| code: 'ObjectDefineProperty({}, "key", ReflectGetOwnPropertyDescriptor({}, "key"))', | ||
| errors: [{ message: /prototype pollution/ }], | ||
| }, | ||
| { | ||
| code: 'ReflectDefineProperty({}, "key", ReflectGetOwnPropertyDescriptor({}, "key"))', | ||
| errors: [{ message: /prototype pollution/ }], | ||
| }, | ||
| { | ||
| code: 'ObjectDefineProperty({}, "key", { __proto__: Object.prototype })', | ||
| errors: [{ message: /null-prototype/ }], | ||
| }, | ||
| { | ||
| code: 'ReflectDefineProperty({}, "key", { __proto__: Object.prototype })', | ||
| errors: [{ message: /null-prototype/ }], | ||
| }, | ||
| { | ||
| code: 'ObjectDefineProperty({}, "key", { [`__proto__`]: null })', | ||
| errors: [{ message: /null-prototype/ }], | ||
| }, | ||
| { | ||
| code: 'ReflectDefineProperty({}, "key", { [`__proto__`]: null })', | ||
| errors: [{ message: /null-prototype/ }], | ||
| }, | ||
| { | ||
| code: 'ObjectDefineProperty({}, "key", { enumerable: true })', | ||
| errors: [{ message: /null-prototype/ }], | ||
| }, | ||
| { | ||
| code: 'ReflectDefineProperty({}, "key", { enumerable: true })', | ||
| errors: [{ message: /null-prototype/ }], | ||
| }, | ||
| ] | ||
| }); |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,92 @@ | ||
| 'use strict'; | ||
|
|
||
| function checkProperties(context, node) { | ||
| if ( | ||
| node.type === 'CallExpression' && | ||
| node.callee.name === 'ObjectGetOwnPropertyDescriptors' | ||
| ) { | ||
| context.report({ | ||
| node, | ||
| message: | ||
| 'Property descriptors inherits from the Object prototype, therefore are subject to prototype pollution', | ||
| }); | ||
| } | ||
| if (node.type !== 'ObjectExpression') return; | ||
| for (const { key, value } of node.properties) { | ||
| if ( | ||
| key != null && value != null && | ||
| !(key.type === 'Identifier' && key.name === '__proto__') && | ||
| !(key.type === 'Literal' && key.value === '__proto__') | ||
| ) { | ||
| checkPropertyDescriptor(context, value); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| function checkPropertyDescriptor(context, node) { | ||
| if ( | ||
| node.type === 'CallExpression' && | ||
| (node.callee.name === 'ObjectGetOwnPropertyDescriptor' || | ||
| node.callee.name === 'ReflectGetOwnPropertyDescriptor') | ||
| ) { | ||
| context.report({ | ||
| node, | ||
| message: | ||
| 'Property descriptors inherits from the Object prototype, therefore are subject to prototype pollution', | ||
| suggest: [{ | ||
| desc: 'Wrap the property descriptor in a null-prototype object', | ||
| fix(fixer) { | ||
| return [ | ||
| fixer.insertTextBefore(node, '{ __proto__: null,...'), | ||
| fixer.insertTextAfter(node, ' }'), | ||
| ]; | ||
| }, | ||
| }], | ||
| }); | ||
| } | ||
| if (node.type !== 'ObjectExpression') return; | ||
|
|
||
| for (const { key, value } of node.properties) { | ||
| if ( | ||
| key != null && value != null && | ||
| ((key.type === 'Identifier' && key.name === '__proto__') || | ||
| (key.type === 'Literal' && key.value === '__proto__')) && | ||
| value.type === 'Literal' && value.value === null | ||
| ) { | ||
| return true; | ||
| } | ||
| } | ||
|
|
||
| context.report({ | ||
| node, | ||
| message: 'Must use null-prototype object for property descriptors', | ||
| }); | ||
| } | ||
|
|
||
| const CallExpression = 'ExpressionStatement[expression.type="CallExpression"]'; | ||
| module.exports = { | ||
| meta: { hasSuggestions: true }, | ||
| create(context) { | ||
| return { | ||
| [`${CallExpression}[expression.callee.name=${/^(Object|Reflect)DefinePropert(ies|y)$/}]`]( | ||
| node | ||
| ) { | ||
| switch (node.expression.callee.name) { | ||
| case 'ObjectDefineProperties': | ||
| checkProperties(context, node.expression.arguments[1]); | ||
| break; | ||
| case 'ReflectDefineProperty': | ||
| case 'ObjectDefineProperty': | ||
| checkPropertyDescriptor(context, node.expression.arguments[2]); | ||
| break; | ||
| default: | ||
| throw new Error('Unreachable'); | ||
| } | ||
| }, | ||
|
|
||
| [`${CallExpression}[expression.callee.name="ObjectCreate"][expression.arguments.length=2]`](node) { | ||
| checkProperties(context, node.expression.arguments[1]); | ||
| }, | ||
| }; | ||
| }, | ||
| }; |
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Non-blocking nit: The other rules are all in alphabetical order, so maybe consider moving this and/or renaming it? (
no-pollutable-prototypesor something like that?)