Check your Amazon EC2 security groups for inbound rules that allow unrestricted access (i.e. 0.0.0.0/0 or ::/0) on TCP port 1433 in order to reduce the exposure to security risks and protect the Microsoft SQL Database Server instances associated with your security groups. TCP port 1433 is used by Microsoft SQL Server, a secure and performant object-relational database system (RDBMS) developed by Microsoft.
This rule can help you with the following compliance standards:
- PCI
- APRA
- MAS
- NIST4
For further details on compliance standards supported by Conformity, see here.
This rule can help you work with the AWS Well-Architected Framework.
This rule resolution is part of the Conformity Security & Compliance tool for AWS.
Allowing unrestricted inbound/ingress access on TCP port 1433 (Microsoft SQL Server) via Amazon EC2 security group rules can increase opportunities for malicious activities such as hacking, brute-force attacks, and SQL injection attacks.
Audit
To determine if your Amazon EC2 security groups allow unrestricted MSSQL access, perform the following operations:
Remediation / Resolution
To update the inbound rule configuration for your Amazon EC2 security groups in order to restrict Microsoft SQL Server access to trusted entities only (i.e. authorized IP addresses and IP ranges, or other security groups), perform the following operations:
References
- AWS Documentation
- Amazon EC2 security groups for Linux instances
- Work with security groups
- Security group rules for different use cases
- Authorize inbound traffic for your Linux instances
- AWS Command Line Interface (CLI) Documentation
- ec2
- describe-security-groups
- revoke-security-group-ingress
- authorize-security-group-ingress
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You are auditing:
Unrestricted MsSQL Access
Risk Level: Medium