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The RDP service has enabled the RC4 cipher suite considered outdated when is used in conjunction with TLS/SSL.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

• 266.Disable insecure functionalities

Fixes

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