GCP - Federation Abuse

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OIDC - Matumizi Mabaya ya Vitendo vya Github

GCP

Ili kumpa ufikiaji kwa Vitendo vya Github kutoka kwa repo ya Github kwa akaunti ya huduma ya GCP hatua zifuatazo zinahitajika:

• Unda Akaunti ya Huduma ili kupata ufikiaji kutoka kwa vitendo vya github na ruhusa zilizotakikana:

projectId=FIXME
gcloud config set project $projectId

# Create the Service Account
gcloud iam service-accounts create "github-demo-sa"
saId="github-demo-sa@${projectId}.iam.gserviceaccount.com"

# Enable the IAM Credentials API
gcloud services enable iamcredentials.googleapis.com

# Give permissions to SA

gcloud projects add-iam-policy-binding $projectId \
--member="serviceAccount:$saId" \
--role="roles/iam.securityReviewer"

• Jenga bwawa jipya la kitambulisho cha kazi:

# Create a Workload Identity Pool
poolName=wi-pool

gcloud iam workload-identity-pools create $poolName \
--location global \
--display-name $poolName

poolId=$(gcloud iam workload-identity-pools describe $poolName \
--location global \
--format='get(name)')

• Jenga mtoaji mpya wa kitambulisho cha mzigo wa kazi wa workload identity pool OIDC ambao unamuamini github actions (kwa jina la org/repo katika hali hii):

attributeMappingScope=repository # could be sub (GitHub repository and branch) or repository_owner (GitHub organization)

gcloud iam workload-identity-pools providers create-oidc $poolName \
--location global \
--workload-identity-pool $poolName \
--display-name $poolName \
--attribute-mapping "google.subject=assertion.${attributeMappingScope},attribute.actor=assertion.actor,attribute.aud=assertion.aud,attribute.repository=assertion.repository" \
--issuer-uri "https://token.actions.githubusercontent.com"

providerId=$(gcloud iam workload-identity-pools providers describe $poolName \
--location global \
--workload-identity-pool $poolName \
--format='get(name)')

• Mwishowe, ruhusu mkuu kutoka kwa mtoa huduma kutumie mkuu wa huduma:

gitHubRepoName="repo-org/repo-name"
gcloud iam service-accounts add-iam-policy-binding $saId \
--role "roles/iam.workloadIdentityUser" \
--member "principalSet://iam.googleapis.com/${poolId}/attribute.${attributeMappingScope}/${gitHubRepoName}"

Tafadhali kumbuka jinsi tunavyotaja org-name/repo-name katika hali ya awali ili kuweza kupata upatikanaji wa akaunti ya huduma (parameta zingine zinazofanya iwe zaidi ya kizuizi kama tawi pia zinaweza kutumika).

Hata hivyo, pia ni inawezekana kuruhusu github yote kupata akaunti ya huduma kwa kuunda mtoa huduma kama ifuatavyo kwa kutumia alama ya pekee:

# Unda Dimbwi la Kitambulisho cha Kazi
poolName=wi-pool2

gcloud iam workload-identity-pools create $poolName \
--location global \
--display-name $poolName

poolId=$(gcloud iam workload-identity-pools describe $poolName \
--location global \
--format='get(name)')

gcloud iam workload-identity-pools providers create-oidc $poolName \
--project="${projectId}" \
--location="global" \
--workload-identity-pool="$poolName" \
--display-name="Mtoa huduma wa Demo" \
--attribute-mapping="google.subject=assertion.sub,attribute.actor=assertion.actor,attribute.aud=assertion.aud" \
--issuer-uri="https://token.actions.githubusercontent.com"

providerId=$(gcloud iam workload-identity-pools providers describe $poolName \
--location global \
--workload-identity-pool $poolName \
--format='get(name)')

# ANGALIA ALAMA YA PEKEE
gcloud iam service-accounts add-iam-policy-binding "${saId}" \
--project="${projectId}" \
--role="roles/iam.workloadIdentityUser" \
  --member="principalSet://iam.googleapis.com/${poolId}/*"

Katika kesi hii yeyote anaweza kupata akaunti ya huduma kutoka kwa vitendo vya github, kwa hivyo ni muhimu siku zote kuchunguza jinsi mwanachama anavyofafanuliwa. Daima inapaswa kuwa kitu kama hiki:

attribute.{custom_attribute}:principalSet://iam.googleapis.com/projects/{project}/locations/{location}/workloadIdentityPools/{pool}/attribute.{custom_attribute}/{value}

Github

Kumbuka kubadilisha ${providerId} na ${saId} kwa thamani zao husika:

name: Check GCP action
on:
workflow_dispatch:
pull_request:
branches:
- main

permissions:
id-token: write

jobs:
Get_OIDC_ID_token:
runs-on: ubuntu-latest
steps:
- id: 'auth'
name: 'Authenticate to GCP'
uses: 'google-github-actions/auth@v0.3.1'
with:
create_credentials_file: 'true'
workload_identity_provider: '${providerId}'
service_account: '${saId}'
- id: 'gcloud'
name: 'gcloud'
run: |-
gcloud auth login --brief --cred-file="${{ steps.auth.outputs.credentials_file_path }}"
gcloud auth list
gcloud projects list

Jifunze AWS hacking kutoka sifuri hadi shujaa na htARTE (Mtaalam wa Timu Nyekundu ya AWS ya HackTricks)!

Njia nyingine za kusaidia HackTricks:

• Ikiwa unataka kuona kampuni yako ikitangazwa kwenye HackTricks au kupakua HackTricks kwa PDF Angalia MIPANGO YA KUJIUNGA!

• Pata bidhaa rasmi za PEASS & HackTricks

• Gundua Familia ya PEASS, mkusanyiko wetu wa NFTs ya kipekee

• Jiunge na 💬 Kikundi cha Discord au kikundi cha telegram au tufuate kwenye Twitter 🐦 @hacktricks_live.

• Shiriki mbinu zako za kuhack kwa kuwasilisha PRs kwa HackTricks na HackTricks Cloud repos za github.