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CCE
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CCE-41483-9

Platform: cpe:/o:microsoft:windows_10Date: (C)2016-09-23   (M)2023-07-04



Disable: 'Network Security: Restrict NTLM: Add remote server exceptions for NTLM authentication' for ClientAllowedNTLMServers This policy setting allows you to create an exception list of remote servers to which clients are allowed to use NTLM authentication if the "Network Security: Restrict NTLM: Outgoing NTLM traffic to remote servers" policy setting is configured. The naming format for servers on this exception list is the fully qualified domain name (FQDN) or NetBIOS server name used by the application, listed one per line. To ensure exceptions the name used by all applications needs to be in the list, and to ensure an exception is accurate, the server name should be listed in both naming formats . A single asterisk (*) can be used anywhere in the string as a wildcard character. Counter Measure: Add the FQDNs and NetBIOS names of remote servers to which you want this host to be able to authenticate via NTLM. Potential Impact: If you configure this policy setting, you can define a list of remote servers to which clients are allowed to use NTLM authentication. If you do not configure this policy setting, no exceptions will be applied."


Parameter:

[server exception]


Technical Mechanism:

(1) GPO: Computer ConfigurationWindows SettingsSecurity SettingsLocal PoliciesSecurity OptionsNetwork Security: Restrict NTLM: Add remote server exceptions for NTLM authentication (2) REG: HKEY_LOCAL_MACHINESystemCurrentControlSetControlLsaMSV1_0ClientAllowedNTLMServers

CCSS Severity:CCSS Metrics:
CCSS Score : 9.9Attack Vector: NETWORK
Exploit Score: 3.1Attack Complexity: LOW
Impact Score: 6.0Privileges Required: LOW
Severity: CRITICALUser Interaction: NONE
Vector: AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:HScope: CHANGED
 Confidentiality: HIGH
 Integrity: HIGH
 Availability: HIGH
  

References:
Resource IdReference
SCAP Repo OVAL Definitionoval:org.secpod.oval:def:34976


OVAL    1
oval:org.secpod.oval:def:34976
XCCDF    2
xccdf_org.secpod_benchmark_NIST_800_171_R1_Windows_10
xccdf_org.secpod_benchmark_general_Windows_10

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