diff --git a/src/pentesting-cloud/aws-security/aws-privilege-escalation/aws-bedrock-privesc/README.md b/src/pentesting-cloud/aws-security/aws-privilege-escalation/aws-bedrock-privesc/README.md new file mode 100644 index 000000000..8ed510b17 --- /dev/null +++ b/src/pentesting-cloud/aws-security/aws-privilege-escalation/aws-bedrock-privesc/README.md @@ -0,0 +1,113 @@ +# AWS - Bedrock PrivEsc + +{{#include ../../../../banners/hacktricks-training.md}} + +## Amazon Bedrock AgentCore + +### `bedrock-agentcore:StartCodeInterpreterSession` + `bedrock-agentcore:InvokeCodeInterpreter` - Code Interpreter Execution-Role Pivot + +AgentCore Code Interpreter is 'n bestuurde uitvoeringsomgewing. **Custom Code Interpreters** kan gekonfigureer word met 'n **`executionRoleArn`** wat “permissions vir die code interpreter verskaf om toegang tot AWS services te kry”. + +As 'n **IAM-prinsipaal met laer regte** 'n Code Interpreter-sessie kan **start + invoke** wat gekonfigureer is met 'n **meer-geprivilegieerde execution role**, kan die caller effektief **pivot in die execution role se permissions** (laterale beweging / privilege escalation afhangend van die rol se omvang). + +> [!NOTE] +> Dit is tipies 'n **miskonfigurasie / oormatige permissions**-kwessie (om wye permissions aan die interpreter execution role te gee en/of om breë invoke-toegang te verleen). +> AWS waarsku uitdruklik om privilege escalation te vermy deur te verseker dat execution roles **gelyk of minder** privilegies het as identiteite wat toegelaat word om te invoke. + +#### Preconditions (common misconfiguration) + +- 'n **custom code interpreter** bestaan met 'n oor-geprivilegieerde **execution role** (bv: toegang tot sensitiewe S3/Secrets/SSM of IAM-admin-like capabilities). +- 'n Gebruiker (developer/auditor/CI identity) het toestemming om: +- start sessions: `bedrock-agentcore:StartCodeInterpreterSession` +- invoke tools: `bedrock-agentcore:InvokeCodeInterpreter` +- (Optional) The user can also create interpreters: `bedrock-agentcore:CreateCodeInterpreter` (lets them create a new interpreter configured with an execution role, depending on org guardrails). + +#### Recon (identify custom interpreters and execution role usage) + +Lys interpreters (control-plane) en inspekteer hul konfigurasie: +```bash +aws bedrock-agentcore-control list-code-interpreters +aws bedrock-agentcore-control get-code-interpreter --code-interpreter-id +```` +> Die create-code-interpreter command ondersteun `--execution-role-arn` wat bepaal watter AWS-magtigings die interpreter sal hê. + +#### Stap 1 - Begin 'n sessie (dit gee 'n `sessionId` terug, nie 'n interaktiewe shell nie) +```bash +SESSION_ID=$( +aws bedrock-agentcore start-code-interpreter-session \ +--code-interpreter-identifier \ +--name "arte-oussama" \ +--query sessionId \ +--output text +) + +echo "SessionId: $SESSION_ID" +``` +#### Stap 2 - Roep kode-uitvoering aan (Boto3 of signed HTTPS) + +Daar is **geen interaktiewe python shell** vanaf `start-code-interpreter-session` nie. Uitvoering gebeur via **InvokeCodeInterpreter**. + +**Opsie A - Boto3 voorbeeld (voer Python uit + verifieer identiteit):** +```python +import boto3 + +client = boto3.client("bedrock-agentcore", region_name="") + +# Execute python inside the Code Interpreter session +resp = client.invoke_code_interpreter( +codeInterpreterIdentifier="", +sessionId="", +name="executeCode", +arguments={ +"language": "python", +"code": "import boto3; print(boto3.client('sts').get_caller_identity())" +} +) + +# Response is streamed; print events for visibility +for event in resp.get("stream", []): +print(event) +``` +As die interpreter gekonfigureer is met 'n execution role, sal die uitset van `sts:GetCallerIdentity()` daardie role se identiteit weerspieël (nie die low-priv caller nie), wat die pivot demonstreer. + +**Opsie B - Gesigneerde HTTPS-oproep (awscurl):** +```bash +awscurl -X POST \ +"https://bedrock-agentcore..amazonaws.com/code-interpreters//tools/invoke" \ +-H "Content-Type: application/json" \ +-H "Accept: application/json" \ +-H "x-amzn-code-interpreter-session-id: " \ +--service bedrock-agentcore \ +--region \ +-d '{ +"name": "executeCode", +"arguments": { +"language": "python", +"code": "print(\"Hello from AgentCore\")" +} +}' +``` +#### Impak + +* **Lateral movement** na watter AWS-toegang die interpreter execution role ook al het. +* **Privilege escalation** as die interpreter execution role meer bevoegdhede het as die caller. +* Moeiliker opsporing as CloudTrail data events vir interpreter invocations nie geaktiveer is nie (invocations mag dalk standaard nie aangeteken word nie, afhangend van konfigurasie). + +#### Mitigasies / Verharding + +* **Least privilege** op die interpreter `executionRoleArn` (behandel dit soos Lambda execution roles / CI roles). +* **Restrict who can invoke** (`bedrock-agentcore:InvokeCodeInterpreter`) en wie sessies kan begin. +* Use **SCPs** om InvokeCodeInterpreter te weier behalwe vir goedgekeurde agent runtime roles (org-level enforcement kan nodig wees). +* Skakel toepaslike **CloudTrail data events** vir AgentCore waar toepaslik in; waarsku oor onverwagte invocations en sessie-aanmaak. + +## References + +- [Sonrai: AWS AgentCore privilege escalation path (SCP mitigation)](https://sonraisecurity.com/blog/aws-agentcore-privilege-escalation-bedrock-scp-fix/) +- [Sonrai: Credential exfiltration paths in AWS code interpreters (MMDS)](https://sonraisecurity.com/blog/sandboxed-to-compromised-new-research-exposes-credential-exfiltration-paths-in-aws-code-interpreters/) +- [AWS CLI: create-code-interpreter (`--execution-role-arn`)](https://docs.aws.amazon.com/cli/latest/reference/bedrock-agentcore-control/create-code-interpreter.html) +- [AWS CLI: start-code-interpreter-session (returns `sessionId`)](https://docs.aws.amazon.com/cli/latest/reference/bedrock-agentcore/start-code-interpreter-session.html) +- [AWS Dev Guide: Code Interpreter API reference examples (Boto3 + awscurl invoke)](https://docs.aws.amazon.com/bedrock-agentcore/latest/devguide/code-interpreter-api-reference-examples.html) +- [AWS Dev Guide: Security credentials management (MMDS + privilege escalation warning)](https://docs.aws.amazon.com/bedrock-agentcore/latest/devguide/security-credentials-management.html) + + +{{#include ../../../../banners/hacktricks-training.md}}