cdk-nag
Version:
Check CDK v2 applications for best practices using a combination on available rule packs.
107 lines • 13.1 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
/*
Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
SPDX-License-Identifier: Apache-2.0
*/
const path_1 = require("path");
const aws_cdk_lib_1 = require("aws-cdk-lib");
const aws_iam_1 = require("aws-cdk-lib/aws-iam");
const nag_rules_1 = require("../../nag-rules");
/**
* Lambda functions have least privileged access permissions.
* @param node the CfnResource to check
*/
exports.default = Object.defineProperty((node) => {
// Only check IAM roles
if (!(node instanceof aws_iam_1.CfnRole)) {
return nag_rules_1.NagRuleCompliance.NOT_APPLICABLE;
}
// Check if this is a Lambda role
if (!isLambdaRole(node)) {
return nag_rules_1.NagRuleCompliance.NOT_APPLICABLE;
}
// Check if the role has any policies with wildcard permissions
const inlinePolicies = aws_cdk_lib_1.Stack.of(node).resolve(node.policies);
if (inlinePolicies && inlinePolicies.length > 0) {
for (const policy of inlinePolicies) {
const resolvedPolicy = aws_cdk_lib_1.Stack.of(node).resolve(policy);
const policyDocument = aws_cdk_lib_1.Stack.of(node).resolve(resolvedPolicy.policyDocument);
if (policyDocument.Statement) {
for (const statement of policyDocument.Statement) {
if (statementContainsWildcard(statement)) {
return nag_rules_1.NagRuleCompliance.NON_COMPLIANT;
}
}
}
}
}
// If we've checked all policies and found no wildcards, the role is compliant
return nag_rules_1.NagRuleCompliance.COMPLIANT;
}, 'name', { value: (0, path_1.parse)(__filename).name });
/**
* Checks if a role is assumed by the Lambda service
* @param node The CfnRole to check
* @returns true if the role is assumed by Lambda service
*/
function isLambdaRole(node) {
const assumeRolePolicyDocument = aws_cdk_lib_1.Stack.of(node).resolve(node.assumeRolePolicyDocument);
if (!assumeRolePolicyDocument || !assumeRolePolicyDocument.Statement) {
return false;
}
for (const statement of assumeRolePolicyDocument.Statement) {
if (statement.Principal && statement.Principal.Service) {
const service = Array.isArray(statement.Principal.Service)
? statement.Principal.Service
: [statement.Principal.Service];
if (service.includes('lambda.amazonaws.com')) {
return true;
}
}
}
return false;
}
/**
* Checks if a policy statement contains wildcard permissions
* @param statement The policy statement to check
* @returns true if the statement contains wildcard permissions
*/
function statementContainsWildcard(statement) {
// Only check Allow statements
if (statement.Effect !== 'Allow') {
return false;
}
// Check for wildcard in actions
const actions = normalizeToArray(statement.Action);
for (const action of actions) {
if (typeof action === 'string') {
// Check for full wildcard ('*')
if (action === '*') {
return true;
}
// Check for service level wildcard (e.g., 's3:*')
// But allow service specific partial actions (e.g., 's3:Get*')
if (action.endsWith(':*')) {
return true;
}
}
}
// Check for full wildcard in resources
// Only flag resources that are exactly '*'
const resources = normalizeToArray(statement.Resource);
for (const resource of resources) {
if (typeof resource === 'string' && resource === '*') {
return true;
}
}
return false;
}
/**
* Normalizes a value to an array
* @param value The value to normalize
* @returns An array containing the value(s)
*/
function normalizeToArray(value) {
return Array.isArray(value) ? value : [value];
}
//# sourceMappingURL=data:application/json;base64,{"version":3,"file":"LambdaStarPermissions.js","sourceRoot":"","sources":["../../../src/rules/lambda/LambdaStarPermissions.ts"],"names":[],"mappings":";;AAAA;;;EAGE;AACF,+BAA6B;AAC7B,6CAAiD;AACjD,iDAA8C;AAC9C,+CAAoD;AAYpD;;;GAGG;AACH,kBAAe,MAAM,CAAC,cAAc,CAClC,CAAC,IAAiB,EAAqB,EAAE;IACvC,uBAAuB;IACvB,IAAI,CAAC,CAAC,IAAI,YAAY,iBAAO,CAAC,EAAE,CAAC;QAC/B,OAAO,6BAAiB,CAAC,cAAc,CAAC;IAC1C,CAAC;IAED,iCAAiC;IACjC,IAAI,CAAC,YAAY,CAAC,IAAI,CAAC,EAAE,CAAC;QACxB,OAAO,6BAAiB,CAAC,cAAc,CAAC;IAC1C,CAAC;IAED,+DAA+D;IAC/D,MAAM,cAAc,GAAG,mBAAK,CAAC,EAAE,CAAC,IAAI,CAAC,CAAC,OAAO,CAAC,IAAI,CAAC,QAAQ,CAAC,CAAC;IAE7D,IAAI,cAAc,IAAI,cAAc,CAAC,MAAM,GAAG,CAAC,EAAE,CAAC;QAChD,KAAK,MAAM,MAAM,IAAI,cAAc,EAAE,CAAC;YACpC,MAAM,cAAc,GAAG,mBAAK,CAAC,EAAE,CAAC,IAAI,CAAC,CAAC,OAAO,CAAC,MAAM,CAAC,CAAC;YACtD,MAAM,cAAc,GAAsB,mBAAK,CAAC,EAAE,CAAC,IAAI,CAAC,CAAC,OAAO,CAC9D,cAAc,CAAC,cAAc,CAC9B,CAAC;YAEF,IAAI,cAAc,CAAC,SAAS,EAAE,CAAC;gBAC7B,KAAK,MAAM,SAAS,IAAI,cAAc,CAAC,SAAS,EAAE,CAAC;oBACjD,IAAI,yBAAyB,CAAC,SAAS,CAAC,EAAE,CAAC;wBACzC,OAAO,6BAAiB,CAAC,aAAa,CAAC;oBACzC,CAAC;gBACH,CAAC;YACH,CAAC;QACH,CAAC;IACH,CAAC;IAED,8EAA8E;IAC9E,OAAO,6BAAiB,CAAC,SAAS,CAAC;AACrC,CAAC,EACD,MAAM,EACN,EAAE,KAAK,EAAE,IAAA,YAAK,EAAC,UAAU,CAAC,CAAC,IAAI,EAAE,CAClC,CAAC;AAEF;;;;GAIG;AACH,SAAS,YAAY,CAAC,IAAa;IACjC,MAAM,wBAAwB,GAAG,mBAAK,CAAC,EAAE,CAAC,IAAI,CAAC,CAAC,OAAO,CACrD,IAAI,CAAC,wBAAwB,CAC9B,CAAC;IAEF,IAAI,CAAC,wBAAwB,IAAI,CAAC,wBAAwB,CAAC,SAAS,EAAE,CAAC;QACrE,OAAO,KAAK,CAAC;IACf,CAAC;IAED,KAAK,MAAM,SAAS,IAAI,wBAAwB,CAAC,SAAS,EAAE,CAAC;QAC3D,IAAI,SAAS,CAAC,SAAS,IAAI,SAAS,CAAC,SAAS,CAAC,OAAO,EAAE,CAAC;YACvD,MAAM,OAAO,GAAG,KAAK,CAAC,OAAO,CAAC,SAAS,CAAC,SAAS,CAAC,OAAO,CAAC;gBACxD,CAAC,CAAC,SAAS,CAAC,SAAS,CAAC,OAAO;gBAC7B,CAAC,CAAC,CAAC,SAAS,CAAC,SAAS,CAAC,OAAO,CAAC,CAAC;YAElC,IAAI,OAAO,CAAC,QAAQ,CAAC,sBAAsB,CAAC,EAAE,CAAC;gBAC7C,OAAO,IAAI,CAAC;YACd,CAAC;QACH,CAAC;IACH,CAAC;IAED,OAAO,KAAK,CAAC;AACf,CAAC;AAED;;;;GAIG;AACH,SAAS,yBAAyB,CAAC,SAA6B;IAC9D,8BAA8B;IAC9B,IAAI,SAAS,CAAC,MAAM,KAAK,OAAO,EAAE,CAAC;QACjC,OAAO,KAAK,CAAC;IACf,CAAC;IAED,gCAAgC;IAChC,MAAM,OAAO,GAAG,gBAAgB,CAAC,SAAS,CAAC,MAAM,CAAC,CAAC;IACnD,KAAK,MAAM,MAAM,IAAI,OAAO,EAAE,CAAC;QAC7B,IAAI,OAAO,MAAM,KAAK,QAAQ,EAAE,CAAC;YAC/B,gCAAgC;YAChC,IAAI,MAAM,KAAK,GAAG,EAAE,CAAC;gBACnB,OAAO,IAAI,CAAC;YACd,CAAC;YAED,kDAAkD;YAClD,+DAA+D;YAC/D,IAAI,MAAM,CAAC,QAAQ,CAAC,IAAI,CAAC,EAAE,CAAC;gBAC1B,OAAO,IAAI,CAAC;YACd,CAAC;QACH,CAAC;IACH,CAAC;IAED,uCAAuC;IACvC,2CAA2C;IAC3C,MAAM,SAAS,GAAG,gBAAgB,CAAC,SAAS,CAAC,QAAQ,CAAC,CAAC;IACvD,KAAK,MAAM,QAAQ,IAAI,SAAS,EAAE,CAAC;QACjC,IAAI,OAAO,QAAQ,KAAK,QAAQ,IAAI,QAAQ,KAAK,GAAG,EAAE,CAAC;YACrD,OAAO,IAAI,CAAC;QACd,CAAC;IACH,CAAC;IAED,OAAO,KAAK,CAAC;AACf,CAAC;AAED;;;;GAIG;AACH,SAAS,gBAAgB,CAAI,KAAc;IACzC,OAAO,KAAK,CAAC,OAAO,CAAC,KAAK,CAAC,CAAC,CAAC,CAAC,KAAK,CAAC,CAAC,CAAC,CAAC,KAAK,CAAC,CAAC;AAChD,CAAC","sourcesContent":["/*\nCopyright Amazon.com, Inc. or its affiliates. All Rights Reserved.\nSPDX-License-Identifier: Apache-2.0\n*/\nimport { parse } from 'path';\nimport { CfnResource, Stack } from 'aws-cdk-lib';\nimport { CfnRole } from 'aws-cdk-lib/aws-iam';\nimport { NagRuleCompliance } from '../../nag-rules';\n\ninterface IAMPolicyDocument {\n  Statement?: IAMPolicyStatement[];\n}\n\ninterface IAMPolicyStatement {\n  Action: string | string[];\n  Effect: 'Allow' | 'Deny';\n  Resource: unknown;\n}\n\n/**\n * Lambda functions have least privileged access permissions.\n * @param node the CfnResource to check\n */\nexport default Object.defineProperty(\n  (node: CfnResource): NagRuleCompliance => {\n    // Only check IAM roles\n    if (!(node instanceof CfnRole)) {\n      return NagRuleCompliance.NOT_APPLICABLE;\n    }\n\n    // Check if this is a Lambda role\n    if (!isLambdaRole(node)) {\n      return NagRuleCompliance.NOT_APPLICABLE;\n    }\n\n    // Check if the role has any policies with wildcard permissions\n    const inlinePolicies = Stack.of(node).resolve(node.policies);\n\n    if (inlinePolicies && inlinePolicies.length > 0) {\n      for (const policy of inlinePolicies) {\n        const resolvedPolicy = Stack.of(node).resolve(policy);\n        const policyDocument: IAMPolicyDocument = Stack.of(node).resolve(\n          resolvedPolicy.policyDocument\n        );\n\n        if (policyDocument.Statement) {\n          for (const statement of policyDocument.Statement) {\n            if (statementContainsWildcard(statement)) {\n              return NagRuleCompliance.NON_COMPLIANT;\n            }\n          }\n        }\n      }\n    }\n\n    // If we've checked all policies and found no wildcards, the role is compliant\n    return NagRuleCompliance.COMPLIANT;\n  },\n  'name',\n  { value: parse(__filename).name }\n);\n\n/**\n * Checks if a role is assumed by the Lambda service\n * @param node The CfnRole to check\n * @returns true if the role is assumed by Lambda service\n */\nfunction isLambdaRole(node: CfnRole): boolean {\n  const assumeRolePolicyDocument = Stack.of(node).resolve(\n    node.assumeRolePolicyDocument\n  );\n\n  if (!assumeRolePolicyDocument || !assumeRolePolicyDocument.Statement) {\n    return false;\n  }\n\n  for (const statement of assumeRolePolicyDocument.Statement) {\n    if (statement.Principal && statement.Principal.Service) {\n      const service = Array.isArray(statement.Principal.Service)\n        ? statement.Principal.Service\n        : [statement.Principal.Service];\n\n      if (service.includes('lambda.amazonaws.com')) {\n        return true;\n      }\n    }\n  }\n\n  return false;\n}\n\n/**\n * Checks if a policy statement contains wildcard permissions\n * @param statement The policy statement to check\n * @returns true if the statement contains wildcard permissions\n */\nfunction statementContainsWildcard(statement: IAMPolicyStatement): boolean {\n  // Only check Allow statements\n  if (statement.Effect !== 'Allow') {\n    return false;\n  }\n\n  // Check for wildcard in actions\n  const actions = normalizeToArray(statement.Action);\n  for (const action of actions) {\n    if (typeof action === 'string') {\n      // Check for full wildcard ('*')\n      if (action === '*') {\n        return true;\n      }\n\n      // Check for service level wildcard (e.g., 's3:*')\n      // But allow service specific partial actions (e.g., 's3:Get*')\n      if (action.endsWith(':*')) {\n        return true;\n      }\n    }\n  }\n\n  // Check for full wildcard in resources\n  // Only flag resources that are exactly '*'\n  const resources = normalizeToArray(statement.Resource);\n  for (const resource of resources) {\n    if (typeof resource === 'string' && resource === '*') {\n      return true;\n    }\n  }\n\n  return false;\n}\n\n/**\n * Normalizes a value to an array\n * @param value The value to normalize\n * @returns An array containing the value(s)\n */\nfunction normalizeToArray<T>(value: T | T[]): T[] {\n  return Array.isArray(value) ? value : [value];\n}\n"]}