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Nuclei Templates

Unrestricted HTTP on EC2

ID: ec2-unrestricted-http

Severity: critical

Author: princechaddha

Tags: cloud,devops,aws,amazon,ec2,aws-cloud-config

Description

Section titled “Description”

Checks for inbound rules in EC2 security groups allowing unrestricted access (0.0.0.0/0) to TCP port 80, increasing exposure to potential breaches.

YAML Source

Section titled “YAML Source”
id: ec2-unrestricted-http
info:
  name: Unrestricted HTTP on EC2
  author: princechaddha
  severity: critical
  description: |
    Checks for inbound rules in EC2 security groups allowing unrestricted access (0.0.0.0/0) to TCP port 80, increasing exposure to potential breaches.
  impact: |
    Unrestricted access to TCP port 80 can lead to unauthorized data exposure and increases the risk of security breaches.
  remediation: |
    Restrict inbound traffic on TCP port 80 to only necessary IP addresses, adhering to the principle of least privilege.
  reference:
    - https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-security-groups.html
  tags: cloud,devops,aws,amazon,ec2,aws-cloud-config


variables:
  region: "us-east-1"


self-contained: true
code:
  - engine:
      - sh
      - bash
    source: |
      aws ec2 describe-security-groups --region $region --filters Name=ip-permission.from-port,Values=80 Name=ip-permission.to-port,Values=80 Name=ip-permission.cidr,Values='0.0.0.0/0' --query 'SecurityGroups[*].GroupId' --output json


    extractors:
      - type: json
        name: securitygroup
        internal: true
        json:
          - '.[]'


      - type: dsl
        dsl:
          - 'securitygroup + " security group(s) alows unrestricted access (0.0.0.0/0 or ::/0) on TCP port 80"'
# digest: 4a0a004730450221009f14fce67c7ed1c87516a472bd9ff6c86384a90af8fd5fef53ba4705ae402c3802205278dc94d1553c98e35dbf3f51b6eac6b8036c1379d6d6bcdeb2702b7e195c82:922c64590222798bb761d5b6d8e72950

Guide to check the vulnerabilities

Section titled “Guide to check the vulnerabilities”

This template is used to detect vulnerabilities in web applications. It can be used with the Nuclei tool to scan for specific patterns or behaviors.

Terminal window
$ nuclei -u "URL" -t "cloud/aws/ec2/ec2-unrestricted-http.yaml"

View on Github