├── .gitignore ├── LICENSE ├── README.md ├── aws-oidc-tester.py ├── gcp-oidc-tester.py ├── github-aws-example.png └── github-gcp-example.png /.gitignore: -------------------------------------------------------------------------------- 1 | # Byte-compiled / optimized / DLL files 2 | __pycache__/ 3 | *.py[cod] 4 | *$py.class 5 | 6 | # C extensions 7 | *.so 8 | 9 | # Distribution / packaging 10 | .Python 11 | build/ 12 | develop-eggs/ 13 | dist/ 14 | downloads/ 15 | eggs/ 16 | .eggs/ 17 | lib/ 18 | lib64/ 19 | parts/ 20 | sdist/ 21 | var/ 22 | wheels/ 23 | share/python-wheels/ 24 | *.egg-info/ 25 | .installed.cfg 26 | *.egg 27 | MANIFEST 28 | 29 | # PyInstaller 30 | # Usually these files are written by a python script from a template 31 | # before PyInstaller builds the exe, so as to inject date/other infos into it. 32 | *.manifest 33 | *.spec 34 | 35 | # Installer logs 36 | pip-log.txt 37 | pip-delete-this-directory.txt 38 | 39 | # Unit test / coverage reports 40 | htmlcov/ 41 | .tox/ 42 | .nox/ 43 | .coverage 44 | .coverage.* 45 | .cache 46 | nosetests.xml 47 | coverage.xml 48 | *.cover 49 | *.py,cover 50 | .hypothesis/ 51 | .pytest_cache/ 52 | cover/ 53 | 54 | # Translations 55 | *.mo 56 | *.pot 57 | 58 | # Django stuff: 59 | *.log 60 | local_settings.py 61 | db.sqlite3 62 | db.sqlite3-journal 63 | 64 | # Flask stuff: 65 | instance/ 66 | .webassets-cache 67 | 68 | # Scrapy stuff: 69 | .scrapy 70 | 71 | # Sphinx documentation 72 | docs/_build/ 73 | 74 | # PyBuilder 75 | .pybuilder/ 76 | target/ 77 | 78 | # Jupyter Notebook 79 | .ipynb_checkpoints 80 | 81 | # IPython 82 | profile_default/ 83 | ipython_config.py 84 | 85 | # pyenv 86 | # For a library or package, you might want to ignore these files since the code is 87 | # intended to run in multiple environments; otherwise, check them in: 88 | # .python-version 89 | 90 | # pipenv 91 | # According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control. 92 | # However, in case of collaboration, if having platform-specific dependencies or dependencies 93 | # having no cross-platform support, pipenv may install dependencies that don't work, or not 94 | # install all needed dependencies. 95 | #Pipfile.lock 96 | 97 | # poetry 98 | # Similar to Pipfile.lock, it is generally recommended to include poetry.lock in version control. 99 | # This is especially recommended for binary packages to ensure reproducibility, and is more 100 | # commonly ignored for libraries. 101 | # https://python-poetry.org/docs/basic-usage/#commit-your-poetrylock-file-to-version-control 102 | #poetry.lock 103 | 104 | # pdm 105 | # Similar to Pipfile.lock, it is generally recommended to include pdm.lock in version control. 106 | #pdm.lock 107 | # pdm stores project-wide configurations in .pdm.toml, but it is recommended to not include it 108 | # in version control. 109 | # https://pdm.fming.dev/#use-with-ide 110 | .pdm.toml 111 | 112 | # PEP 582; used by e.g. github.com/David-OConnor/pyflow and github.com/pdm-project/pdm 113 | __pypackages__/ 114 | 115 | # Celery stuff 116 | celerybeat-schedule 117 | celerybeat.pid 118 | 119 | # SageMath parsed files 120 | *.sage.py 121 | 122 | # Environments 123 | .env 124 | .venv 125 | env/ 126 | venv/ 127 | ENV/ 128 | env.bak/ 129 | venv.bak/ 130 | 131 | # Spyder project settings 132 | .spyderproject 133 | .spyproject 134 | 135 | # Rope project settings 136 | .ropeproject 137 | 138 | # mkdocs documentation 139 | /site 140 | 141 | # mypy 142 | .mypy_cache/ 143 | .dmypy.json 144 | dmypy.json 145 | 146 | # Pyre type checker 147 | .pyre/ 148 | 149 | # pytype static type analyzer 150 | .pytype/ 151 | 152 | # Cython debug symbols 153 | cython_debug/ 154 | 155 | # PyCharm 156 | # JetBrains specific template is maintained in a separate JetBrains.gitignore that can 157 | # be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore 158 | # and can be added to the global gitignore or merged into this file. 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This script, released to the public, enables organizations to scan their accounts & projects identifying vulnerabilities in their IAM roles & service accounts. 7 | 8 | ## Usage 9 | 10 | There are 2 scripts in this repository, both written in Python 3.11. 11 | You should run them as an authenticated user and have the following dependencies installed: 12 | 13 | **GCP:** gcloud cli, which can be downloaded from here - https://cloud.google.com/sdk/docs/install 14 | 15 | 16 | **AWS:** boto3 python library (which can be installed by executing: pip install boto3) 17 | 18 | ## Execution Examples 19 | 20 | 21 | **GCP** 22 | Below is example for the tool execution on GCP Project 23 | ![Example](github-gcp-example.png) 24 | 25 | **AWS** 26 | Below is example for the tool execution in the context of AWS account 27 | ![Example](github-aws-example.png) 28 | -------------------------------------------------------------------------------- /aws-oidc-tester.py: -------------------------------------------------------------------------------- 1 | import boto3 2 | import json 3 | from botocore.exceptions import NoCredentialsError 4 | 5 | def check_vuln_sub_pattern(sub_patterns): 6 | if not isinstance(sub_patterns,list): 7 | sub_patterns = [sub_patterns] 8 | for pattern in sub_patterns: 9 | if pattern.index("*") > 0 and pattern.index("*") < pattern.index("/"): 10 | return True 11 | return False 12 | 13 | 14 | def get_roles_paginated(client, **kwargs): 15 | """ 16 | A generator function to handle pagination for AWS IAM APIs and return a list of roles. 17 | """ 18 | paginator = client.get_paginator('list_roles') 19 | roles = [] 20 | for page in paginator.paginate(**kwargs): 21 | for role in page['Roles']: 22 | roles.append(role) 23 | return roles 24 | 25 | 26 | print("###########################") 27 | print("Github OIDC Scanner - AWS") 28 | print("By Rezonate.io") 29 | print("###########################") 30 | print("\nThis tool is not a replacement for an in-depth examination of permissions and service-accounts and its use is the sole responsibility of the user") 31 | print() 32 | 33 | try: 34 | print("Authenticating") 35 | iam_client = boto3.client('iam') 36 | print("Searching for OIDC Trust in the account") 37 | oidc_providers = iam_client.list_open_id_connect_providers() 38 | if len(oidc_providers) == 0: 39 | print("There are no trusted identity provider within the account.") 40 | exit(0) 41 | print("Checking if github is trusted") 42 | found_git = False 43 | for provider in oidc_providers['OpenIDConnectProviderList']: 44 | if str(provider["Arn"]).endswith("token.actions.githubusercontent.com"): 45 | found_git = True 46 | if not found_git: 47 | print("GitHub OIDC trust was not detected.") 48 | exit(0) 49 | else: 50 | print("Found OIDC trust for GitHub. Searching for relevant roles") 51 | 52 | 53 | except NoCredentialsError: 54 | print("Missing AWS credentials. Please ensure that the script runs from authenticated terminal") 55 | exit(0) 56 | 57 | roles = get_roles_paginated(iam_client) 58 | github_roles = [] 59 | # iterate through the list of roles 60 | for role in roles: 61 | if (not role["AssumeRolePolicyDocument"] or not role["AssumeRolePolicyDocument"]["Statement"]): 62 | continue 63 | statements = role["AssumeRolePolicyDocument"]["Statement"] 64 | if not isinstance(statements,list): 65 | statements = [statements] 66 | for statement in statements: 67 | if statement["Effect"] != "Allow": 68 | continue 69 | principals = statement["Principal"] 70 | if not isinstance(principals, list): 71 | principals = [principals] 72 | for principal in principals: 73 | if "Federated" in principal and str(principal["Federated"]).endswith("oidc-provider/token.actions.githubusercontent.com"): 74 | github_roles.append(role) 75 | 76 | if len(github_roles) == 0: 77 | print("There are no roles that trust GitHub OIDC") 78 | exit(0) 79 | 80 | found_vuln = False 81 | vuln_no_sub = [] 82 | vuln_loosy_sub = [] 83 | 84 | print(f"Found {len(github_roles)} roles that trust GitHub OIDC. evaluating them") 85 | for role in github_roles: 86 | print(f"Evaluating {role['RoleName']} , {role['Arn']}") 87 | statements = role["AssumeRolePolicyDocument"]["Statement"] 88 | for statement in statements: 89 | if statement["Effect"] != "Allow": 90 | continue 91 | if "Condition" not in statement or "token.actions.githubusercontent.com:sub" not in json.dumps(statement,default=str): 92 | vuln_no_sub.append(role) 93 | found_vuln = True 94 | continue 95 | condition = statement["Condition"] 96 | if "StringLike" in condition and "token.actions.githubusercontent.com:sub" in condition["StringLike"] and check_vuln_sub_pattern(condition["StringLike"]["token.actions.githubusercontent.com:sub"]): 97 | found_vuln = True 98 | vuln_loosy_sub.append(role) 99 | continue 100 | 101 | 102 | 103 | if not found_vuln: 104 | print("\n-------------------------\nNo Vulnerable roles detected.\n-------------------------") 105 | exit(0) 106 | 107 | print("-------------------------\nFound Vulnerable roles!\n--------------------------") 108 | 109 | if len(vuln_no_sub) > 0: 110 | print("Vulnerable to Missing Subject:") 111 | for role in vuln_no_sub: 112 | print(f"[!]{role['Arn']}") 113 | 114 | 115 | if len(vuln_loosy_sub) > 0: 116 | print("Vulnerable to Bypassable Subject:") 117 | for role in vuln_loosy_sub: 118 | print(f"[!]{role['Arn']}") 119 | 120 | 121 | 122 | 123 | 124 | 125 | -------------------------------------------------------------------------------- /gcp-oidc-tester.py: -------------------------------------------------------------------------------- 1 | import subprocess 2 | import json 3 | 4 | identity_pools_paths = [] 5 | vuln_services = [] 6 | github_services = [] 7 | 8 | def get_identity_pools(project_id): 9 | command = f"gcloud iam workload-identity-pools list --location=global --project={project_id} --format=json" 10 | process = subprocess.Popen(command, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE) 11 | stdout, stderr = process.communicate() 12 | 13 | identity_pools = [] 14 | if stdout: 15 | identity_pools = stdout.decode().strip() 16 | else: 17 | print("Error while listing pools") 18 | exit(0) 19 | return identity_pools 20 | 21 | def get_service_accounts(project_id): 22 | command = f"gcloud iam service-accounts list --project={project_id} --format=json" 23 | process = subprocess.Popen(command, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE) 24 | stdout, stderr = process.communicate() 25 | 26 | service_accounts = [] 27 | if stdout: 28 | service_accounts = stdout.decode().strip() 29 | else: 30 | print("Error while listing service accounts") 31 | exit(0) 32 | return service_accounts 33 | 34 | def get_binding(service_account_email,project_id): 35 | command = f"gcloud iam service-accounts get-iam-policy --project={project_id} {service_account_email} --format=json" 36 | process = subprocess.Popen(command, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE) 37 | stdout, stderr = process.communicate() 38 | 39 | if stdout: 40 | info = stdout.decode().strip() 41 | return info 42 | print("Error while getting service accounts bindings info") 43 | exit(0) 44 | 45 | 46 | 47 | 48 | def get_identity_pool_info(project_id,identity_pool): 49 | command = f"gcloud iam workload-identity-pools providers list --project={project_id} --location=global --workload-identity-pool={identity_pool} --format=json" 50 | process = subprocess.Popen(command, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE) 51 | stdout, stderr = process.communicate() 52 | 53 | if stdout: 54 | info = stdout.decode().strip() 55 | return info 56 | print("Error while getting pool info") 57 | exit(0) 58 | 59 | def main(): 60 | project_id = input("Enter the Project ID: ") 61 | print("Checking Identity Pools") 62 | identity_pools = get_identity_pools(project_id) 63 | print("Checking Service Accounts") 64 | service_accounts = get_service_accounts(project_id) 65 | 66 | if identity_pools: 67 | pools = json.loads(identity_pools) 68 | for pool in pools: 69 | if pool["state"] != "ACTIVE": 70 | continue 71 | pool_providers_info = get_identity_pool_info(project_id,pool["name"]) 72 | pool_providers_info = json.loads(pool_providers_info) 73 | for provider in pool_providers_info: 74 | if "oidc" in provider and str(provider["oidc"]["issuerUri"]).lower() == "https://token.actions.githubusercontent.com": 75 | if (pool["name"] not in identity_pools_paths): 76 | identity_pools_paths.append(pool["name"]) 77 | 78 | else: 79 | print(f"No identity pools found in project '{project_id}'.") 80 | print("Scan completed, no possible vuln service accounts were found") 81 | exit(0) 82 | 83 | if service_accounts: 84 | service_accounts = json.loads(service_accounts) 85 | for svc in service_accounts: 86 | if svc["disabled"] != False: 87 | continue 88 | binding = get_binding(svc['email'],project_id) 89 | if binding: 90 | binding_parsed = json.loads(binding) 91 | if "bindings" in binding_parsed: 92 | members = binding_parsed["bindings"] 93 | if not isinstance(members,list): 94 | members = [members] 95 | for member_binding in members: 96 | for member_binding_pool_rule in member_binding["members"]: 97 | rule = str(member_binding_pool_rule) 98 | rule = member_binding_pool_rule.replace("principalSet://iam.googleapis.com/","").replace("principal://iam.googleapis.com/","") 99 | for idp in identity_pools_paths: 100 | if idp in rule: 101 | if not svc["email"] in github_services: 102 | github_services.append(svc["email"]) 103 | rule = rule.replace(idp,"") 104 | if rule == "/*": 105 | vuln_services.append(svc['email']) 106 | print("\n-------------------------------\nScan results\n-------------------------------") 107 | print(f"Found {len(identity_pools_paths)} GitHub Identity Providers") 108 | for idp in identity_pools_paths: 109 | print(f"[*]{idp}") 110 | print() 111 | print(f"\nFound {len(github_services)} Service accounts with access to GitHub identity provider") 112 | for git in github_services: 113 | print(f"[*]{git}") 114 | print() 115 | if vuln_services: 116 | print(f"Found Possibly Vulnerable Service Accounts:") 117 | for vuln in vuln_services: 118 | print(f"[!]{vuln}") 119 | else: 120 | print("Did not find any possibly Vulnerable Service Accounts") 121 | 122 | if __name__ == "__main__": 123 | print("###########################") 124 | print("Github OIDC Scanner - GCP") 125 | print("By Rezonate.io") 126 | print("###########################") 127 | print("\nThis tool is not a replacement for an in-depth examination of permissions and service-accounts and its use is the sole responsibility of the user") 128 | print() 129 | main() -------------------------------------------------------------------------------- /github-aws-example.png: -------------------------------------------------------------------------------- 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