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CCE
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CCE-35411-8

Platform: cpe:/o:microsoft:windows_8.1Date: (C)2015-10-14   (M)2023-07-04



Network Security: Allow PKU2U authentication requests to this computer to use online identities Windows 7 and Windows Server 2008 R2 introduce an extension to the Negotiate authentication package, Spnego.dll. In previous versions of Windows, Negotiate decides whether to use Kerberos or NTLM for authentication. The extension SSP for Negotiate, Negoexts, which is treated as an authentication protocol by Windows, supports Microsoft SSPs including PKU2U. You can also develop or add other SSPs. When computers are configured to accept authentication requests by using online IDs, Negoexts.dll calls the PKU2U SSP on the computer that is used to log on. The PKU2U SSP obtains a local certificate and exchanges the policy between the peer computers. When validated on the peer computer, the certificate within the metadata is sent to the logon peer for validation and associates the user's certificate to a security token and the logon process completes. This policy will be turned off by default on domain joined machines. This would disallow the online identities to be able to authenticate to the domain joined machine in Windows 7.


Parameter:

[enable/disable]


Technical Mechanism:

(1) GPO: Computer ConfigurationWindows SettingsSecurity SettingsLocal PoliciesSecurity Options!Network Security: Allow PKU2U authentication requests to this computer to use online identities (2) REG: HKEY_LOCAL_MACHINESystemCurrentControlSetControlLsapku2u!AllowOnlineID

CCSS Severity:CCSS Metrics:
CCSS Score : 5.6Attack Vector: NETWORK
Exploit Score: 2.2Attack Complexity: HIGH
Impact Score: 3.4Privileges Required: NONE
Severity: MEDIUMUser Interaction: NONE
Vector: AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:LScope: UNCHANGED
 Confidentiality: LOW
 Integrity: LOW
 Availability: LOW
  

References:
Resource IdReference
SCAP Repo OVAL Definitionoval:org.secpod.oval:def:22588


OVAL    1
oval:org.secpod.oval:def:22588
XCCDF    6
xccdf_org.secpod_benchmark_HIPAA_45CFR_164_Windows_8_1
xccdf_org.secpod_benchmark_ISO27001_Windows_8_1
xccdf_org.secpod_benchmark_NIST_800_53_r4_Windows_8_1
xccdf_org.secpod_benchmark_PCI_3_2_Windows_8_1
...

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