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Insecure service configuration - RDP

Description​

The RDP service has enabled the RC4 cipher suite considered outdated when is used in conjunction with TLS/SSL.

Impact​

Obtain information derived from the encrypted channel.

Recommendation​

Disable the RC4 cipher suite on the server.

Threat​

Anonymous attacker in the intranet.

Expected Remediation Time​

⌚ 30 minutes.

Score​

Default score using CVSS 3.1. It may change depending on the context of the src.

Base​

  • Attack vector: A
  • Attack complexity: H
  • Privileges required: N
  • User interaction: R
  • Scope: U
  • Confidentiality: L
  • Integrity: N
  • Availability: N

Temporal​

  • Exploit code maturity: P
  • Remediation level: O
  • Report confidence: X

Result​

  • Vector string: CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N/E:P/RL:O/RC:X
  • Score:
    • Base: 2.6
    • Temporal: 2.4
  • Severity:
    • Base: Low
    • Temporal: Low

Score 4.0​

Default score using CVSS 4.0 . It may change depending on the context of the src.

Base 4.0​

  • Attack vector: A
  • Attack complexity: H
  • Attack Requirements: N
  • Privileges required: N
  • User interaction: A
  • Confidentiality (VC): L
  • Integrity (VI): N
  • Availability (VA): N
  • Confidentiality (SC): N
  • Integrity (SI): N
  • Availability (SA): N

Threat 4.0​

  • Exploit maturity: P

Result 4.0​

  • Vector string: CVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P
  • Score:
    • CVSS-BT: 1.1
  • Severity:
    • CVSS-BT: Low

Compliant code​

The server allows only secure cipher suites

name: Configure the Remote Desktop Gateway
  win_rds_settings:
    certificate_hash: B0D0FA8408FC67B230338FCA584D03792DA73F4C
    max_connections: 50
    cipher_suite: TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
  notify:
    - Restart TSGateway service

Non compliant code​

The server allows a RC4 cipher suite

name: Configure the Remote Desktop Gateway
  win_rds_settings:
    certificate_hash: B0D0FA8408FC67B230338FCA584D03792DA73F4C
    max_connections: 50
    cipher_suite: ECDHE_ECDSA_WITH_RC4_128_SHA
  notify:
    - Restart TSGateway service

Requirements​

Fixes​

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