Security Group Excessive Counts
More Info:
Your AWS account should not have excessive number of security groups per region.Risk Level
MediumAddress
SecurityCompliance Standards
AWSWAFTriage and Remediation
Remediation
Using Console
Using Console
Excessive counts in Security Groups could indicate that there are too many rules in a single Security Group, which can lead to security risks and complexity in managing the rules. To remediate this issue in AWS using the AWS console, follow these steps:
- Log in to the AWS Management Console and navigate to the EC2 dashboard.
- Select the Security Group that has excessive counts.
- Click on the “Edit inbound rules” button to modify the rules.
- Review the rules and identify any redundant or unnecessary rules.
- Remove any redundant or unnecessary rules by clicking on the “X” button next to each rule.
- Consolidate similar rules by combining them into a single rule.
- Click on the “Save rules” button to save the changes.
Using CLI
Using CLI
The Security Group Excessive Counts issue occurs when a security group has too many rules, which can lead to performance issues and make it difficult to manage the security group. To remediate this issue in AWS using AWS CLI, follow these steps:
- Open the AWS CLI on your computer.
- Use the following command to list all the security groups in your AWS account:
- Identify the security group that has too many rules.
- Use the following command to get the details of the security group:
- Review the rules and identify any rules that are not necessary or duplicates.
- Use the following command to delete the unnecessary rules:
-
Replace
<security-group-id>with the ID of the security group that has too many rules. -
Replace
<ip-permissions>with the IP permissions of the rule that you want to delete. You can get the IP permissions from the output of the previous command. - Repeat steps 6 to 8 for all the unnecessary rules.
- Use the following command to confirm that the rules have been deleted:
- Verify that the security group no longer has excessive counts.
Using Python
Using Python
To remediate Security Group Excessive Counts in AWS using python, you can follow these steps:In this example, we are checking if a security group has more than 50 inbound rules and removing all the inbound rules using the
-
Identify the security groups with excessive counts by using the
describe_security_groupsmethod from theboto3library in python. This method will return a list of all the security groups in your AWS account. You can then iterate through this list to identify the security groups with excessive counts. -
Once you have identified the security groups with excessive counts, you can use the
revoke_ingressmethod to remove unnecessary inbound rules. This method takes in theGroupIdparameter to identify the security group and theIpPermissionsparameter to specify the inbound rules to be removed. -
After removing the unnecessary inbound rules, you can use the
authorize_ingressmethod to add the necessary inbound rules. This method takes in theGroupIdparameter to identify the security group and theIpPermissionsparameter to specify the inbound rules to be added.
revoke_ingress method. We are then adding two necessary inbound rules for SSH and HTTP using the authorize_ingress method. You can modify the code to suit your specific requirements.