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Nuclei Templates

Unrestricted OpenSearch Access

ID: ec2-unrestricted-opensearch

Severity: critical

Author: princechaddha

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

Description

Section titled “Description”

Checks EC2 security groups for inbound rules allowing unrestricted access to OpenSearch on TCP port 9200. Restricts access to essential IP addresses only.

YAML Source

Section titled “YAML Source”
id: ec2-unrestricted-opensearch
info:
  name: Unrestricted OpenSearch Access
  author: princechaddha
  severity: critical
  description: |
    Checks EC2 security groups for inbound rules allowing unrestricted access to OpenSearch on TCP port 9200. Restricts access to essential IP addresses only.
  impact: |
    Unrestricted access to OpenSearch can lead to unauthorized data access, modification, or denial of service attacks.
  remediation: |
    Modify EC2 security group rules to limit access to TCP port 9200 for OpenSearch, allowing only necessary IPs, implementing the principle of least privilege.
  reference:
    - https://en.wikipedia.org/wiki/OpenSearch
  tags: cloud,devops,aws,amazon,opensearch,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=9200 Name=ip-permission.to-port,Values=9200 Name=ip-permission.cidr,Values='0.0.0.0/0 or ::/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 9200"'
# digest: 490a0046304402200fc896d983f1c75401ea458a364af62585640d879ba6c6b5993974424017ac7a02206f226c824f454bf1d911e61c6fc38f04e610a70bab8b8049164aea7fb19052e7:922c64590222798bb761d5b6d8e72950

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-opensearch.yaml"

View on Github