2024-04-11 14:23:07 +00:00
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id: ec2-unrestricted-ftp
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info:
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name: Restrict EC2 FTP Access
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author: princechaddha
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severity: critical
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description: |
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Ensure Amazon EC2 security groups disallow unrestricted inbound FTP access on TCP ports 20 and 21 to prevent brute force attacks.
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impact: |
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Unrestricted FTP access can expose EC2 instances to unauthorized access and brute force attacks, compromising security.
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remediation: |
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Restrict inbound access on TCP ports 20 and 21 for EC2 security groups to known IPs or remove the rules if FTP is not required.
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reference:
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- https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-network-security.html#security-group-rules
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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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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.from-port,Values=20,21 Name=ip-permission.to-port,Values=20,21 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: securitygroup
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internal: true
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json:
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- '.[]'
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- type: dsl
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dsl:
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- 'securitygroup + " security group(s) alows unrestricted access (0.0.0.0/0 or ::/0) on TCP port 20 or 21"'
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2024-04-11 14:25:25 +00:00
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# digest: 4a0a0047304502205f388ef25cd4e10ea8b0ca947a8100c1b849e7503e01c6485d3d23c30e190d16022100a24ea5679098a9da74b661c8375a32c2e91cb9e9e82682ffdd981cc1b1c78e79:922c64590222798bb761d5b6d8e72950
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