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🛡️ AWS OpenSearch Domain is not encrypted with the latest TLS policy🟢

Logic​

Similar Policies​

Description​

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Description​

This policy identifies AWS OpenSearch Domains that do not enforce HTTPS or are not configured to use the latest Transport Layer Security (TLS) security policy.

Rationale​

AWS OpenSearch Service supports multiple TLS security policies that define the minimum TLS protocol version and the set of allowed cipher suites for HTTPS endpoints. Legacy protocols such as TLS 1.0 and TLS 1.1 contain known cryptographic weaknesses and should not be used.

Enforcing HTTPS with a modern TLS policy (TLS 1.2 or higher) significantly strengthens data-in-transit protection by ensuring that communications between clients and the OpenSearch domain remain encrypted, authenticated, and resistant to interception or tampering.

Audit​

This policy flags an AWS OpenSearch Service domain as INCOMPLIANT when either of the following conditions is met:

  • Endpoint Options: Enforce HTTPS is set to false, or
  • Endpoint Options: TLS Security Policy is configured with a legacy policy, including Policy-Min-TLS-1-0-2019-07 or Policy-Min-TLS-1-2-2019-07

Remediation​

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Remediation​

Enforce HTTPS and Update TLS Policy for OpenSearch Domain​

To ensure secure communications, enable HTTPS and configure the OpenSearch Service domain to use the latest TLS security policy.

From Command Line​

Use the update-domain-config command to enforce HTTPS and set the TLS security policy. Replace the placeholders with your domain name and the desired TLS policy (Policy-Min-TLS-1-2-PFS-2023-10 or the latest supported version).

aws opensearch update-domain-config \
    --domain-name {{domain-name}} \
    --domain-endpoint-options '{
        "EnforceHTTPS": true,
        "TLSSecurityPolicy": "Policy-Min-TLS-1-2-PFS-2023-10"
    }'
Considerations​
  • Client Configuration: All client applications must be updated to use the https:// endpoint URL. Connections using http:// will fail after this change.

policy.yaml​

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Linked Framework Sections​

SectionSub SectionsInternal RulesPoliciesFlagsCompliance
💼 AWS Foundational Security Best Practices v1.0.0 → 💼 [ES.8] Connections to Elasticsearch domains should be encrypted using the latest TLS security policy1no data
💼 AWS Foundational Security Best Practices v1.0.0 → 💼 [Opensearch.8] Connections to OpenSearch domains should be encrypted using the latest TLS security policy1no data
💼 Cloudaware Framework → 💼 Data Encryption66no data
💼 FedRAMP High Security Controls → 💼 AC-4 Information Flow Enforcement (M)(H)23795no data
💼 FedRAMP High Security Controls → 💼 AC-17(2) Protection of Confidentiality and Integrity Using Encryption (M)(H)20no data
💼 FedRAMP High Security Controls → 💼 IA-5(1) Password-based Authentication (L)(M)(H)112no data
💼 FedRAMP High Security Controls → 💼 SC-7(4) External Telecommunications Services (M)(H)41no data
💼 FedRAMP High Security Controls → 💼 SC-8 Transmission Confidentiality and Integrity (L)(M)(H)1823no data
💼 FedRAMP High Security Controls → 💼 SC-8(1) Cryptographic Protection (L)(M)(H)822no data
💼 FedRAMP High Security Controls → 💼 SC-13 Cryptographic Protection (L)(M)(H)1640no data
💼 FedRAMP High Security Controls → 💼 SC-23 Session Authenticity (M)(H)719no data
💼 FedRAMP Low Security Controls → 💼 IA-5(1) Password-based Authentication (L)(M)(H)12no data
💼 FedRAMP Low Security Controls → 💼 SC-8 Transmission Confidentiality and Integrity (L)(M)(H)123no data
💼 FedRAMP Low Security Controls → 💼 SC-8(1) Cryptographic Protection (L)(M)(H)22no data
💼 FedRAMP Low Security Controls → 💼 SC-13 Cryptographic Protection (L)(M)(H)40no data
💼 FedRAMP Moderate Security Controls → 💼 AC-4 Information Flow Enforcement (M)(H)179no data
💼 FedRAMP Moderate Security Controls → 💼 AC-17(2) Protection of Confidentiality and Integrity Using Encryption (M)(H)20no data
💼 FedRAMP Moderate Security Controls → 💼 IA-5(1) Password-based Authentication (L)(M)(H)12no data
💼 FedRAMP Moderate Security Controls → 💼 SC-7(4) External Telecommunications Services (M)(H)41no data
💼 FedRAMP Moderate Security Controls → 💼 SC-8 Transmission Confidentiality and Integrity (L)(M)(H)123no data
💼 FedRAMP Moderate Security Controls → 💼 SC-8(1) Cryptographic Protection (L)(M)(H)22no data
💼 FedRAMP Moderate Security Controls → 💼 SC-13 Cryptographic Protection (L)(M)(H)40no data
💼 FedRAMP Moderate Security Controls → 💼 SC-23 Session Authenticity (M)(H)19no data
💼 NIST CSF v2.0 → 💼 DE.CM-09: Computing hardware and software, runtime environments, and their data are monitored to find potentially adverse events162no data
💼 NIST CSF v2.0 → 💼 ID.AM-03: Representations of the organization's authorized network communication and internal and external network data flows are maintained81no data
💼 NIST CSF v2.0 → 💼 PR.DS-01: The confidentiality, integrity, and availability of data-at-rest are protected173no data
💼 NIST CSF v2.0 → 💼 PR.DS-02: The confidentiality, integrity, and availability of data-in-transit are protected149no data
💼 NIST CSF v2.0 → 💼 PR.DS-10: The confidentiality, integrity, and availability of data-in-use are protected169no data
💼 NIST CSF v2.0 → 💼 PR.IR-01: Networks and environments are protected from unauthorized logical access and usage112no data
💼 NIST SP 800-53 Revision 5 → 💼 AC-4 Information Flow Enforcement3269110no data
💼 NIST SP 800-53 Revision 5 → 💼 AC-17(2) Remote Access _ Protection of Confidentiality and Integrity Using Encryption1220no data
💼 NIST SP 800-53 Revision 5 → 💼 IA-5(1) Authenticator Management _ Password-based Authentication12no data
💼 NIST SP 800-53 Revision 5 → 💼 SC-7(4) Boundary Protection _ External Telecommunications Services41no data
💼 NIST SP 800-53 Revision 5 → 💼 SC-8 Transmission Confidentiality and Integrity5823no data
💼 NIST SP 800-53 Revision 5 → 💼 SC-8(1) Transmission Confidentiality and Integrity _ Cryptographic Protection821no data
💼 NIST SP 800-53 Revision 5 → 💼 SC-8(2) Transmission Confidentiality and Integrity _ Pre- and Post-transmission Handling14no data
💼 NIST SP 800-53 Revision 5 → 💼 SC-12(3) Cryptographic Key Establishment and Management _ Asymmetric Keys9no data
💼 NIST SP 800-53 Revision 5 → 💼 SC-13 Cryptographic Protection429no data
💼 NIST SP 800-53 Revision 5 → 💼 SC-23 Session Authenticity513no data
💼 NIST SP 800-53 Revision 5 → 💼 SC-23(3) Session Authenticity _ Unique System-generated Session Identifiers12no data
💼 NIST SP 800-53 Revision 5 → 💼 SI-7(6) Software, Firmware, and Information Integrity _ Cryptographic Protection25no data
💼 PCI DSS v3.2.1 → 💼 4.1 Use strong cryptography and security protocols to safeguard sensitive cardholder data during transmission over open, public networks.1827no data
💼 PCI DSS v4.0.1 → 💼 4.2.1 Strong cryptography and security protocols are implemented to safeguard PAN during transmission over open, public networks.227no data
💼 PCI DSS v4.0 → 💼 4.2.1 Strong cryptography and security protocols are implemented to safeguard PAN during transmission over open, public networks.2927no data