Common Security Issues in Cloud IaaS and How to Mitigate Them

Misconfiguration Risks

Incorrectly set permissions, open storage buckets, and default credentials are the leading cause of IaaS breaches. Because IaaS offers granular control, each virtual machine, network interface, and storage object must be reviewed for least‑privilege settings.

Data Exposure and Encryption Gaps

Data at rest and in transit can be intercepted if encryption is disabled or weak. Many providers supply encryption options, but they must be explicitly enabled and managed with strong key‑management policies.

Network‑Level Vulnerabilities

Improperly configured firewalls, unsecured APIs, and exposed management ports give attackers a foothold. Using security groups, network ACLs, and zero‑trust principles limits lateral movement.

Insider Threats and Account Compromise

Compromised credentials or disgruntled staff can manipulate resources, delete logs, or exfiltrate data. Enforcing multi‑factor authentication, role‑based access control, and continuous monitoring reduces this risk.

Supply‑Chain and Third‑Party Risks

Integrating external services or using shared images introduces hidden vulnerabilities. Verify images, apply patch management, and audit third‑party access regularly.

Mitigation Checklist

• Automate configuration scans with tools like Cloud Custodian or native compliance dashboards.
• Enable encryption by default and rotate keys regularly.
• Apply least‑privilege IAM roles and enforce MFA for all accounts.
• Segment networks, restrict public IPs, and use VPN or private links for admin access.
• Monitor logs in real time with SIEM integration and set up anomaly alerts.

Comparative Overview of Key Controls