57 lines
1.7 KiB
YAML
57 lines
1.7 KiB
YAML
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id: ec2-sg-ingress
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info:
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name: Unrestricted Access on Uncommon EC2 Ports
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author: princechaddha
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severity: high
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description: |
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Ensure Amazon EC2 security groups do not allow unrestricted access (0.0.0.0/0, ::/0) on uncommon ports, protecting against brute force attacks on EC2 instances.
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impact: |
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Unrestricted ingress on uncommon ports increases the risk of unauthorized access and potential brute force attacks on EC2 instances.
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remediation: |
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Restrict access to uncommon ports in EC2 security groups, permitting only necessary traffic and implementing stringent access controls.
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reference:
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- https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/security-group-rules-reference.html
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tags: cloud,devops,aws,amazon,ec2,aws-cloud-config
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variables:
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region: "us-east-1"
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flow: |
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code(1)
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for(let SecurityGroup of iterate(template.securitygroups)){
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set("groupid", SecurityGroup)
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code(2)
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}
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self-contained: true
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code:
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- engine:
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- sh
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- bash
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source: |
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aws ec2 describe-security-groups --region $region --filters Name=ip-permission.cidr,Values='0.0.0.0/0' --output json --query 'SecurityGroups[*].GroupId'
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extractors:
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- type: json
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name: securitygroups
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internal: true
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json:
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- '.[]'
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- engine:
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- sh
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- bash
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source: |
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aws ec2 describe-security-groups --region $region --group-ids $groupid --query 'SecurityGroups[*].IpPermissions[]'
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matchers:
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- type: word
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words:
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- "0.0.0.0/0"
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- "::/0"
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extractors:
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- type: dsl
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dsl:
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- '"Amazon EC2 security group(s) " + groupid + " allows unrestricted inbound traffic"'
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