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🛡️ AWS EC2 Security Group allows public IPv4 (0.0.0.0/0) access to admin ports🟢

  • Contextual name: 🛡️ Security Group allows public IPv4 (0.0.0.0/0) access to admin ports🟢
  • ID: /ce/ca/aws/ec2/security-group-allows-public-ipv4-to-admin-ports
  • Tags:
  • Policy Type: COMPLIANCE_POLICY
  • Policy Categories: SECURITY

Logic​

Similar Policies​

  • Internal: dec-x-bcae85fb

Similar Internal Rules​

RulePoliciesFlags
✉️ dec-x-bcae85fb2

Description​

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Description​

Security groups provide stateful filtering of ingress and egress network traffic to AWS resources. It is recommended that no security group allows unrestricted ingress access to remote server administration ports, such as SSH to port 22 and RDP to port 3389, using either the TCP (6), UDP (17) or ALL (-1) protocols

Rationale​

Public access to remote server administration ports, such as 22 and 3389, increases resource attack surface and unnecessarily raises the risk of resource compromise.

Impact​

When updating an existing environment, ensure that administrators have access to remote server administration ports through another mechanism before removing access by deleting the 0.0.0.0/0 inbound rule.

Audit​

Perform the following to determine if the account is configured as prescribed:

  1. Login to the AWS Management Console at https://console.aws.amazon.com/vpc/home.
  2. In the left pane, click Security Groups.
  3. For each security group, perform the following:
    • Select the security group.
    • Click the Inbound Rules tab.

... see more

Remediation​

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Remediation​

From AWS CLI​

To remove a specific security group rule that allows public (0.0.0.0/0) access to an administrative port, use the following command:

aws ec2 revoke-security-group-ingress \
    --group-id {{sg-id}} \
    --protocol {{protocol}} \
    --port {{port/min-max}} \
    --cidr 0.0.0.0/0

Note: You must revoke the entire rule as it was originally defined — that is, exact protocol, full port range, and CIDR block — and if needed, recreate any safe sub-rules after that.

From Console​

Perform the following to implement the prescribed state:

  1. Login to the AWS Management Console at https://console.aws.amazon.com/vpc/home.
  2. In the left pane, click Security Groups.
  3. For each security group, perform the following:
    • Select the security group.
    • Click the Inbound Rules tab.
    • Click the Edit inbound rules button.
    • Identify the rules to be edited or removed.
    • Either:
      • A. update the Source field to a range other than 0.0.0.0/0, or,
      • B. Click Delete to remove the offending inbound rule.

... see more

policy.yaml​

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Linked Framework Sections​

SectionSub SectionsInternal RulesPoliciesFlagsCompliance
💼 APRA CPG 234 → 💼 36f network design — to ensure authorised network traffic flows and to reduce the impact of security compromises;2930no data
💼 APRA CPG 234 → 💼 45 An understanding of plausible worst case scenarios can help regulated entities identify and implement additional controls to prevent or reduce the impact of such scenarios. One example is malware that infects computers and encrypts data, both on the infected computer and any connected storage, including (corporate) networks and cloud storage. Such attacks reinforce the importance of protecting the backup environment in the event that the production environment is compromised. Common techniques to achieve this include network segmentation, highly restricted and segregated access controls and network traffic flow restrictions.3537no data
💼 AWS Foundational Security Best Practices v1.0.0 → 💼 [EC2.19] Security groups should not allow unrestricted access to ports with high risk10no data
💼 CIS AWS v1.3.0 → 💼 5.2 Ensure no security groups allow ingress from 0.0.0.0/0 to remote server administration ports11no data
💼 CIS AWS v1.4.0 → 💼 5.2 Ensure no security groups allow ingress from 0.0.0.0/0 to remote server administration ports11no data
💼 CIS AWS v1.5.0 → 💼 5.2 Ensure no security groups allow ingress from 0.0.0.0/0 to remote server administration ports - Level 1 (Automated)11no data
💼 CIS AWS v2.0.0 → 💼 5.2 Ensure no security groups allow ingress from 0.0.0.0/0 to remote server administration ports - Level 1 (Automated)11no data
💼 CIS AWS v3.0.0 → 💼 5.2 Ensure no security groups allow ingress from 0.0.0.0/0 to remote server administration ports - Level 1 (Automated)11no data
💼 CIS AWS v4.0.0 → 💼 5.3 Ensure no security groups allow ingress from 0.0.0.0/0 to remote server administration ports (Automated)1no data
💼 CIS AWS v4.0.1 → 💼 5.3 Ensure no security groups allow ingress from 0.0.0.0/0 to remote server administration ports (Automated)1no data
💼 CIS AWS v5.0.0 → 💼 5.3 Ensure no security groups allow ingress from 0.0.0.0/0 to remote server administration ports (Automated)1no data
💼 CIS AWS v6.0.0 → 💼 6.3 Ensure no security groups allow ingress from 0.0.0.0/0 to remote server administration ports (Automated)1no data
💼 Cloudaware Framework → 💼 Public and Anonymous Access101no data
💼 FedRAMP High Security Controls → 💼 AC-3 Access Enforcement (L)(M)(H)3768no data
💼 FedRAMP High Security Controls → 💼 AC-4 Information Flow Enforcement (M)(H)23681no data
💼 FedRAMP High Security Controls → 💼 AC-4(21) Physical or Logical Separation of Information Flows (M)(H)1148no data
💼 FedRAMP High Security Controls → 💼 CM-2 Baseline Configuration (L)(M)(H)3130no data
💼 FedRAMP High Security Controls → 💼 CM-2(2) Automation Support for Accuracy and Currency (M)(H)16no data
💼 FedRAMP High Security Controls → 💼 CM-7 Least Functionality (L)(M)(H)31833no data
💼 FedRAMP High Security Controls → 💼 CM-7(1) Periodic Review (M)(H)1212no data
💼 FedRAMP High Security Controls → 💼 SC-7 Boundary Protection (L)(M)(H)10850no data
💼 FedRAMP High Security Controls → 💼 SC-7(4) External Telecommunications Services (M)(H)28no data
💼 FedRAMP High Security Controls → 💼 SC-7(5) Deny by Default — Allow by Exception (M)(H)18no data
💼 FedRAMP High Security Controls → 💼 SC-7(21) Isolation of System Components (H)24no data
💼 FedRAMP Low Security Controls → 💼 AC-3 Access Enforcement (L)(M)(H)68no data
💼 FedRAMP Low Security Controls → 💼 CM-2 Baseline Configuration (L)(M)(H)29no data
💼 FedRAMP Low Security Controls → 💼 CM-7 Least Functionality (L)(M)(H)29no data
💼 FedRAMP Low Security Controls → 💼 SC-7 Boundary Protection (L)(M)(H)35no data
💼 FedRAMP Moderate Security Controls → 💼 AC-3 Access Enforcement (L)(M)(H)68no data
💼 FedRAMP Moderate Security Controls → 💼 AC-4 Information Flow Enforcement (M)(H)166no data
💼 FedRAMP Moderate Security Controls → 💼 AC-4(21) Physical or Logical Separation of Information Flows (M)(H)48no data
💼 FedRAMP Moderate Security Controls → 💼 CM-2 Baseline Configuration (L)(M)(H)330no data
💼 FedRAMP Moderate Security Controls → 💼 CM-2(2) Automation Support for Accuracy and Currency (M)(H)16no data
💼 FedRAMP Moderate Security Controls → 💼 CM-7 Least Functionality (L)(M)(H)333no data
💼 FedRAMP Moderate Security Controls → 💼 CM-7(1) Periodic Review (M)(H)12no data
💼 FedRAMP Moderate Security Controls → 💼 SC-7 Boundary Protection (L)(M)(H)744no data
💼 FedRAMP Moderate Security Controls → 💼 SC-7(4) External Telecommunications Services (M)(H)28no data
💼 FedRAMP Moderate Security Controls → 💼 SC-7(5) Deny by Default — Allow by Exception (M)(H)18no data
💼 ISO/IEC 27001:2013 → 💼 A.9.1.2 Access to networks and network services1718no data
💼 NIST CSF v1.1 → 💼 DE.CM-1: The network is monitored to detect potential cybersecurity events1863no data
💼 NIST CSF v1.1 → 💼 DE.CM-7: Monitoring for unauthorized personnel, connections, devices, and software is performed1824no data
💼 NIST CSF v1.1 → 💼 DE.DP-5: Detection processes are continuously improved1316no data
💼 NIST CSF v1.1 → 💼 ID.AM-1: Physical devices and systems within the organization are inventoried3no data
💼 NIST CSF v1.1 → 💼 ID.AM-2: Software platforms and applications within the organization are inventoried57no data
💼 NIST CSF v1.1 → 💼 PR.AC-4: Access permissions and authorizations are managed, incorporating the principles of least privilege and separation of duties1756no data
💼 NIST CSF v1.1 → 💼 PR.AC-5: Network integrity is protected (e.g., network segregation, network segmentation)1044no data
💼 NIST CSF v1.1 → 💼 PR.DS-3: Assets are formally managed throughout removal, transfers, and disposition8no data
💼 NIST CSF v1.1 → 💼 PR.DS-5: Protections against data leaks are implemented4791no data
💼 NIST CSF v1.1 → 💼 PR.IP-1: A baseline configuration of information technology/industrial control systems is created and maintained incorporating security principles (e.g. concept of least functionality)426no data
💼 NIST CSF v1.1 → 💼 PR.IP-7: Protection processes are improved2no data
💼 NIST CSF v1.1 → 💼 PR.PT-3: The principle of least functionality is incorporated by configuring systems to provide only essential capabilities2130no data
💼 NIST CSF v1.1 → 💼 PR.PT-4: Communications and control networks are protected1044no data
💼 NIST CSF v2.0 → 💼 DE.CM-01: Networks and network services are monitored to find potentially adverse events145no data
💼 NIST CSF v2.0 → 💼 DE.CM-03: Personnel activity and technology usage are monitored to find potentially adverse events85no data
💼 NIST CSF v2.0 → 💼 DE.CM-06: External service provider activities and services are monitored to find potentially adverse events35no data
💼 NIST CSF v2.0 → 💼 DE.CM-09: Computing hardware and software, runtime environments, and their data are monitored to find potentially adverse events142no data
💼 NIST CSF v2.0 → 💼 ID.AM-01: Inventories of hardware managed by the organization are maintained4no data
💼 NIST CSF v2.0 → 💼 ID.AM-02: Inventories of software, services, and systems managed by the organization are maintained9no data
💼 NIST CSF v2.0 → 💼 ID.AM-03: Representations of the organization's authorized network communication and internal and external network data flows are maintained69no data
💼 NIST CSF v2.0 → 💼 ID.AM-08: Systems, hardware, software, services, and data are managed throughout their life cycles25no data
💼 NIST CSF v2.0 → 💼 ID.IM-03: Improvements are identified from execution of operational processes, procedures, and activities41no data
💼 NIST CSF v2.0 → 💼 PR.AA-05: Access permissions, entitlements, and authorizations are defined in a policy, managed, enforced, and reviewed, and incorporate the principles of least privilege and separation of duties116no data
💼 NIST CSF v2.0 → 💼 PR.AA-06: Physical access to assets is managed, monitored, and enforced commensurate with risk44no data
💼 NIST CSF v2.0 → 💼 PR.DS-01: The confidentiality, integrity, and availability of data-at-rest are protected148no data
💼 NIST CSF v2.0 → 💼 PR.DS-02: The confidentiality, integrity, and availability of data-in-transit are protected125no data
💼 NIST CSF v2.0 → 💼 PR.DS-10: The confidentiality, integrity, and availability of data-in-use are protected142no data
💼 NIST CSF v2.0 → 💼 PR.IR-01: Networks and environments are protected from unauthorized logical access and usage95no data
💼 NIST SP 800-53 Revision 4 → 💼 CM-7 (1) PERIODIC REVIEW34no data
💼 NIST SP 800-53 Revision 4 → 💼 CM-7 LEAST FUNCTIONALITY567no data
💼 NIST SP 800-53 Revision 4 → 💼 CM-8 INFORMATION SYSTEM COMPONENT INVENTORY912no data
💼 NIST SP 800-53 Revision 4 → 💼 PL-2 SYSTEM SECURITY PLAN312no data
💼 NIST SP 800-53 Revision 4 → 💼 SC-7 BOUNDARY PROTECTION23531no data
💼 NIST SP 800-53 Revision 5 → 💼 AC-4 Information Flow Enforcement326891no data
💼 NIST SP 800-53 Revision 5 → 💼 AC-4(21) Information Flow Enforcement _ Physical or Logical Separation of Information Flows3748no data
💼 NIST SP 800-53 Revision 5 → 💼 CA-9(1) Internal System Connections _ Compliance Checks25no data
💼 NIST SP 800-53 Revision 5 → 💼 CM-2 Baseline Configuration729no data
💼 NIST SP 800-53 Revision 5 → 💼 CM-2(2) Baseline Configuration _ Automation Support for Accuracy and Currency16no data
💼 NIST SP 800-53 Revision 5 → 💼 CM-7 Least Functionality923no data
💼 NIST SP 800-53 Revision 5 → 💼 SC-7 Boundary Protection29452no data
💼 NIST SP 800-53 Revision 5 → 💼 SC-7(4) Boundary Protection _ External Telecommunications Services28no data
💼 NIST SP 800-53 Revision 5 → 💼 SC-7(5) Boundary Protection _ Deny by Default — Allow by Exception418no data
💼 NIST SP 800-53 Revision 5 → 💼 SC-7(11) Boundary Protection _ Restrict Incoming Communications Traffic24no data
💼 NIST SP 800-53 Revision 5 → 💼 SC-7(16) Boundary Protection _ Prevent Discovery of System Components25no data
💼 NIST SP 800-53 Revision 5 → 💼 SC-7(21) Boundary Protection _ Isolation of System Components24no data
💼 PCI DSS v3.2.1 → 💼 1.1 Establish and implement firewall and router configuration standards7139no data
💼 PCI DSS v3.2.1 → 💼 1.1.6 Documentation of business justification and approval for use of all services, protocols, and ports allowed, including documentation of security features implemented for those protocols considered to be insecure.127no data
💼 PCI DSS v4.0.1 → 💼 1.2.1 Configuration standards for NSC rulesets are defined, implemented, maintained.34no data
💼 PCI DSS v4.0.1 → 💼 1.2.5 All services, protocols, and ports allowed are identified, approved, and have a defined business need.27no data
💼 PCI DSS v4.0.1 → 💼 1.2.6 Security features are defined and implemented for all services, protocols, and ports that are in use and considered to be insecure, such that the risk is mitigated.27no data
💼 PCI DSS v4.0 → 💼 1.2.1 Configuration standards for NSC rulesets are defined, implemented, maintained.2434no data
💼 PCI DSS v4.0 → 💼 1.2.5 All services, protocols, and ports allowed are identified, approved, and have a defined business need.1527no data
💼 PCI DSS v4.0 → 💼 1.2.6 Security features are defined and implemented for all services, protocols, and ports that are in use and considered to be insecure, such that the risk is mitigated.627no data
💼 SOC 2 → 💼 CC6.1-3 Restricts Logical Access122no data
💼 SOC 2 → 💼 CC6.1-7 Restricts Access to Information Assets1327no data
💼 UK Cyber Essentials → 💼 1.2 Prevent access to the administrative interface from the internet3638no data