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Nuclei Templates

Unrestricted Access to Memcached

ID: ec2-unrestricted-memcached

Severity: critical

Author: princechaddha

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

Description

Section titled “Description”

Detects unrestricted inbound access to Memcached on Amazon EC2 instances, which can lead to cache poisoning, unauthorized access, and DDoS attacks.

YAML Source

Section titled “YAML Source”
id: ec2-unrestricted-memcached
info:
  name: Unrestricted Access to Memcached
  author: princechaddha
  severity: critical
  description: |
    Detects unrestricted inbound access to Memcached on Amazon EC2 instances, which can lead to cache poisoning, unauthorized access, and DDoS attacks.
  impact: |
    Unrestricted access increases the risk of cache poisoning, unauthorized data access, and potential DDoS attacks on the Memcached server.
  remediation: |
    Restrict inbound access to Memcached by updating EC2 security group rules to allow only trusted IPs to connect on TCP/UDP port 11211.
  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=11211 Name=ip-permission.to-port,Values=11211 Name=ip-permission.cidr,Values='0.0.0.0/0' --output json --query 'SecurityGroups[*].GroupId'


    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 11211"'
# digest: 4a0a00473045022100bdeb933cb3e42cbb6599207000e595d0cd58d4321fa615ffa506cc1cf41424bf02202403467ee782ccd57ddb6b1810e7d3dfcadcd55232c1fa8846365af53448e1c8:922c64590222798bb761d5b6d8e72950

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-memcached.yaml"

View on Github