Cloud Penetration Testing: Assessing AWS, Azure, and GCP Environments in GCC

Cloud penetration testing in the GCC is a different discipline from traditional network or web application testing. The attack surface is not a set of IP addresses and open ports - it is a sprawling configuration landscape of IAM policies, storage bucket permissions, network security groups, serverless functions, and container orchestration layers. A misconfigured S3 bucket policy or an overly permissive Azure role assignment can expose more data than any SQL injection.

GCC enterprises are migrating to cloud at scale. UAE’s National Cybersecurity Strategy, Saudi Arabia’s NCA cloud security requirements, and Bahrain’s NESA framework all mandate security testing of cloud environments. Yet most penetration testing firms in the region still treat cloud engagements as traditional infrastructure tests with a cloud-hosted target. The methodology is fundamentally different.

The Shared Responsibility Model and Why It Matters for Pentesting

Every cloud provider operates on a shared responsibility model: the provider secures the infrastructure, and the customer secures their configurations, data, and applications. Cloud penetration testing targets the customer’s side of this divide - the configurations, permissions, and architecture decisions that your team controls.

This means a cloud pentest is not about finding zero-day vulnerabilities in AWS or Azure. It is about finding the misconfigurations, excessive permissions, and architectural weaknesses in how your organization uses these platforms. The attack surface is your configuration, not the provider’s code.

Provider Authorization Requirements

Before testing begins, each cloud provider has specific authorization requirements:

AWS permits penetration testing of most services without prior approval. AWS explicitly allows testing of EC2, RDS, Lambda, API Gateway, CloudFront, and other customer-managed services. Testing of AWS infrastructure itself, DNS zone walking, and denial-of-service testing remain prohibited.

Azure requires no pre-approval for penetration testing of your own resources, provided testing follows the Microsoft Cloud Penetration Testing Rules of Engagement. DDoS testing, social engineering of Microsoft employees, and testing of other customers’ resources are prohibited.

GCP allows penetration testing of your own projects without prior notification. Google’s Acceptable Use Policy applies - no denial-of-service, no testing of Google infrastructure, and no attempting to access other customers’ data.

For GCC enterprises operating across multiple providers, the pentest scope must address authorization requirements for each platform separately.

IAM: The Most Critical Attack Surface

Identity and Access Management is consistently the highest-risk area in cloud penetration testing. In over 80% of pentest.ae’s cloud engagements in the GCC, the most impactful finding involves IAM - not network vulnerabilities, not unpatched servers, but excessive permissions and credential management failures.

AWS IAM Attack Paths

Common AWS IAM findings in GCC environments include:

Overly permissive IAM policies granting *:* (full access) to service accounts that need only specific permissions. This violates least-privilege principles and creates lateral movement paths. A compromised Lambda function with AdministratorAccess gives an attacker the keys to the entire AWS account.

Long-lived access keys without rotation. Many GCC enterprises create IAM user access keys during initial setup and never rotate them. These keys, often embedded in application code or CI/CD pipelines, provide persistent access if compromised. AWS recommends using IAM roles with temporary credentials instead.

Cross-account role assumptions without external ID conditions. When GCC enterprises grant third-party vendors access to their AWS accounts via cross-account roles, missing ExternalId conditions create a confused deputy vulnerability that allows unauthorized role assumption.

Instance metadata service (IMDS) exploitation remains a viable attack path. EC2 instances running with IMDSv1 (the default in many legacy deployments) allow any process on the instance to retrieve IAM role credentials from the metadata endpoint at 169.254.169.254. SSRF vulnerabilities in applications running on these instances can be chained to steal cloud credentials.

Azure IAM Attack Paths

Azure Active Directory (Entra ID) introduces a different attack surface:

Excessive Azure AD role assignments - Global Administrator roles assigned to service accounts, application registrations with Directory.ReadWrite.All permissions, and user accounts with Privileged Role Administrator access that should be restricted to break-glass scenarios.

Application registration credential exposure - Azure AD applications with client secrets stored in code repositories, shared drives, or CI/CD configurations. These credentials provide application-level access to Azure resources and Microsoft Graph API.

Managed Identity abuse - Azure VMs and App Services with system-assigned managed identities that carry excessive RBAC role assignments. A compromised web application running on an App Service with Contributor role on the subscription can modify any resource in that subscription.

GCP IAM Attack Paths

GCP IAM presents its own patterns:

Service account key proliferation - GCP service accounts with downloaded JSON key files distributed across development teams. Unlike AWS access keys, GCP service account keys do not expire and provide persistent access until explicitly revoked.

Primitive role usage - GCC enterprises frequently assign Owner or Editor primitive roles at the project level when predefined or custom roles with specific permissions would be appropriate. A single service account with Editor role can modify any resource in the project.

Domain-wide delegation - GCP service accounts with domain-wide delegation enabled in Google Workspace can impersonate any user in the organization. This is a high-impact finding when the delegated service account is compromised.

Storage Misconfigurations

Cloud storage services - S3, Azure Blob Storage, and Cloud Storage - are the second most common source of critical findings in cloud penetration testing.

Public Access and Oversharing

Despite years of headlines about exposed S3 buckets, public storage misconfigurations persist in GCC environments. The pattern has shifted from accidentally public buckets to overly permissive access policies:

Pre-signed URL abuse - applications that generate pre-signed URLs with excessive expiration times (days or weeks instead of minutes) or that grant upload permissions through pre-signed URLs without content-type restrictions.

Shared access signatures (Azure SAS) with overly broad permissions and long expiration periods. An SAS token granting read-write access to an entire container with a 12-month expiration is equivalent to a long-lived credential.

Cross-account bucket policies that grant access based on AWS account ID without restricting to specific IAM roles. Any principal in the referenced account can access the bucket.

Sensitive Data in Storage

Cloud penetration testing should include a review of what data is stored in cloud storage and whether appropriate access controls are in place. GCC enterprises frequently store database backups, log files containing PII, configuration files with embedded credentials, and encryption keys in cloud storage with insufficient access restrictions.

Network and Infrastructure Testing

While IAM and storage represent the most common critical findings, network-level testing remains important for GCC cloud environments:

Virtual Network Segmentation

VPC and VNet segmentation testing verifies that network boundaries between environments (production, staging, development) are enforced. Common findings include:

• Security groups or network security groups allowing unrestricted traffic between environments
• Shared subnets between production workloads and development jump boxes
• VPC peering connections that expose production resources to less-secured development accounts
• Missing network ACLs allowing lateral movement between subnets

Kubernetes and Container Security

GCC enterprises running Amazon EKS, Azure AKS, or Google GKE face container-specific attack paths:

Kubernetes RBAC misconfigurations - cluster-admin bindings assigned to default service accounts, or namespaced roles with excessive permissions (pods/exec, secrets/get) that enable privilege escalation within the cluster.

Pod security - containers running as root, missing security contexts, host network access enabled, and privileged containers that can escape to the underlying node.

Exposed Kubernetes API - GKE and EKS clusters with public API endpoints and weak authentication. The Kubernetes API is the control plane for your entire container infrastructure - public exposure without strong access controls is a critical finding.

Container image vulnerabilities - images pulled from public registries without scanning, base images with known CVEs, and secrets baked into container image layers during the build process.

GCC-Specific Compliance Context

Cloud penetration testing in the GCC must account for regional regulatory requirements:

UAE NESA - the National Electronic Security Authority requires critical infrastructure operators to conduct regular security assessments of their technology systems, including cloud infrastructure. NESA does not prescribe specific cloud testing methodology but expects findings to be documented and remediated within defined timeframes.

Saudi NCA - the National Cybersecurity Authority’s Cloud Computing Cybersecurity Controls (CCC) require organizations to conduct security assessments of cloud environments, including access control, network security, and data protection controls. NCA CCC maps directly to cloud penetration testing scope areas.

Bahrain CBB - the Central Bank of Bahrain requires regulated financial institutions to conduct regular penetration testing of systems processing financial data, including cloud-hosted systems. The CBB framework emphasizes third-party testing by qualified firms.

Data residency - several GCC regulators require that certain data categories remain within the country or region. Cloud penetration testing should verify that data residency controls are implemented correctly - that replication, backup, and CDN configurations do not inadvertently store regulated data outside permitted jurisdictions.

Multi-Cloud Environments: Compounding Complexity

Many GCC enterprises operate across two or three cloud providers. This multi-cloud reality compounds the attack surface:

Inconsistent IAM policies across providers create gaps. An organization with strict least-privilege policies in AWS but permissive role assignments in Azure has an uneven security posture that attackers will target.

Cross-cloud credential management introduces risk when credentials for one cloud provider are stored in another cloud provider’s secret management service without appropriate access controls.

Inconsistent logging and monitoring across providers means that an attack spanning multiple clouds may be partially visible in one provider’s logs and invisible in another.

A comprehensive cloud penetration test for a multi-cloud GCC enterprise must test each provider’s environment independently and then assess cross-cloud attack paths - a compromised identity in AWS that can be used to access Azure resources, for example.

What a Cloud Pentest Report Should Include

Beyond standard finding documentation, a cloud penetration testing report for GCC enterprises should include:

• Provider-specific remediation - not generic advice, but exact IAM policy changes, security group modifications, and configuration commands for the specific provider
• Compliance mapping - findings mapped to NESA, NCA, or sector-specific requirements relevant to the organization
• Architecture recommendations - structural changes that eliminate entire categories of findings rather than patching individual misconfigurations
• Prioritized remediation roadmap - sequenced recommendations that address the highest-risk findings first while building toward a stronger overall posture

Next Steps

pentest.ae delivers cloud penetration testing across AWS, Azure, and GCP for GCC enterprises. Our engagements cover IAM, storage, networking, container security, and serverless attack paths - with reporting mapped to NESA, NCA, DFSA, and CBUAE requirements.

Book a free 30-minute discovery call to scope your cloud penetration testing engagement with a pentest.ae security researcher.