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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 Encryption70no data
💼 FedRAMP High Security Controls → 💼 AC-4 Information Flow Enforcement (M)(H)237105no data
💼 FedRAMP High Security Controls → 💼 AC-17(2) Protection of Confidentiality and Integrity Using Encryption (M)(H)21no data
💼 FedRAMP High Security Controls → 💼 IA-5(1) Password-based Authentication (L)(M)(H)113no data
💼 FedRAMP High Security Controls → 💼 SC-7(4) External Telecommunications Services (M)(H)49no data
💼 FedRAMP High Security Controls → 💼 SC-8 Transmission Confidentiality and Integrity (L)(M)(H)1825no data
💼 FedRAMP High Security Controls → 💼 SC-8(1) Cryptographic Protection (L)(M)(H)824no data
💼 FedRAMP High Security Controls → 💼 SC-13 Cryptographic Protection (L)(M)(H)1643no data
💼 FedRAMP High Security Controls → 💼 SC-23 Session Authenticity (M)(H)721no data
💼 FedRAMP Low Security Controls → 💼 IA-5(1) Password-based Authentication (L)(M)(H)13no data
💼 FedRAMP Low Security Controls → 💼 SC-8 Transmission Confidentiality and Integrity (L)(M)(H)125no data
💼 FedRAMP Low Security Controls → 💼 SC-8(1) Cryptographic Protection (L)(M)(H)24no data
💼 FedRAMP Low Security Controls → 💼 SC-13 Cryptographic Protection (L)(M)(H)43no data
💼 FedRAMP Moderate Security Controls → 💼 AC-4 Information Flow Enforcement (M)(H)189no data
💼 FedRAMP Moderate Security Controls → 💼 AC-17(2) Protection of Confidentiality and Integrity Using Encryption (M)(H)21no data
💼 FedRAMP Moderate Security Controls → 💼 IA-5(1) Password-based Authentication (L)(M)(H)13no data
💼 FedRAMP Moderate Security Controls → 💼 SC-7(4) External Telecommunications Services (M)(H)49no data
💼 FedRAMP Moderate Security Controls → 💼 SC-8 Transmission Confidentiality and Integrity (L)(M)(H)125no data
💼 FedRAMP Moderate Security Controls → 💼 SC-8(1) Cryptographic Protection (L)(M)(H)24no data
💼 FedRAMP Moderate Security Controls → 💼 SC-13 Cryptographic Protection (L)(M)(H)43no data
💼 FedRAMP Moderate Security Controls → 💼 SC-23 Session Authenticity (M)(H)21no data
💼 NIST CSF v2.0 → 💼 DE.CM-09: Computing hardware and software, runtime environments, and their data are monitored to find potentially adverse events181no data
💼 NIST CSF v2.0 → 💼 ID.AM-03: Representations of the organization's authorized network communication and internal and external network data flows are maintained89no data
💼 NIST CSF v2.0 → 💼 PR.DS-01: The confidentiality, integrity, and availability of data-at-rest are protected187no data
💼 NIST CSF v2.0 → 💼 PR.DS-02: The confidentiality, integrity, and availability of data-in-transit are protected160no data
💼 NIST CSF v2.0 → 💼 PR.DS-10: The confidentiality, integrity, and availability of data-in-use are protected184no data
💼 NIST CSF v2.0 → 💼 PR.IR-01: Networks and environments are protected from unauthorized logical access and usage123no data
💼 NIST SP 800-53 Revision 5 → 💼 AC-4 Information Flow Enforcement3269123no data
💼 NIST SP 800-53 Revision 5 → 💼 AC-17(2) Remote Access _ Protection of Confidentiality and Integrity Using Encryption1221no data
💼 NIST SP 800-53 Revision 5 → 💼 IA-5(1) Authenticator Management _ Password-based Authentication13no data
💼 NIST SP 800-53 Revision 5 → 💼 SC-7(4) Boundary Protection _ External Telecommunications Services49no data
💼 NIST SP 800-53 Revision 5 → 💼 SC-8 Transmission Confidentiality and Integrity5825no data
💼 NIST SP 800-53 Revision 5 → 💼 SC-8(1) Transmission Confidentiality and Integrity _ Cryptographic Protection823no data
💼 NIST SP 800-53 Revision 5 → 💼 SC-8(2) Transmission Confidentiality and Integrity _ Pre- and Post-transmission Handling16no data
💼 NIST SP 800-53 Revision 5 → 💼 SC-12(3) Cryptographic Key Establishment and Management _ Asymmetric Keys10no data
💼 NIST SP 800-53 Revision 5 → 💼 SC-13 Cryptographic Protection432no data
💼 NIST SP 800-53 Revision 5 → 💼 SC-23 Session Authenticity515no data
💼 NIST SP 800-53 Revision 5 → 💼 SC-23(3) Session Authenticity _ Unique System-generated Session Identifiers14no data
💼 NIST SP 800-53 Revision 5 → 💼 SI-7(6) Software, Firmware, and Information Integrity _ Cryptographic Protection27no 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.1828no 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.228no data
💼 PCI DSS v4.0 → 💼 4.2.1 Strong cryptography and security protocols are implemented to safeguard PAN during transmission over open, public networks.2928no data