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An IIS 10.0 web server must maintain the confidentiality of controlled information during transmission through the use of an approved Transport Layer Security (TLS) version.

Overview

Finding IDVersionRule IDIA ControlsSeverity
V-218821IIST-SV-000153SV-218821r1067596_ruleCCI-002418high
Description
TLS encryption is a required security setting for a private web server. Encryption of private information is essential to ensuring data confidentiality. If private information is not encrypted, it can be intercepted and easily read by an unauthorized party. A private web server must use a FIPS 140-2-approved TLS version, and all non-FIPS-approved SSL versions must be disabled. NIST SP 800-52 specifies the preferred configurations for government systems.
STIGDate
Microsoft IIS 10.0 Server Security Technical Implementation Guide2025-06-11

Related Frameworks

3 paths across 3 frameworks
NIST 800-531 mapping
SC-8
1.00
  • DISA · 3 · disa_xccdf · related
  • DISA · 2025-01-23 · disa_cci_list · equivalent
NIST 800-1711 mapping
3.13.8
1.00
  • DISA · 3 · disa_xccdf · related
  • DISA · 2025-01-23 · disa_cci_list · equivalent
  • NIST · Rev 2 (Feb 2020, errata Jan 2021) · nist_800_171_app_d · equivalent
CCI1 mapping
CCI-002418
1.00
  • DISA · 3 · disa_xccdf · related

Details

Check Text (C-218821r1067596_chk)

Access the IIS 10.0 Web Server. Navigate to: HKLM\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.2\Server Verify a REG_DWORD value of "0" for "DisabledByDefault". Verify a REG_DWORD value of "1" for "Enabled". Navigate to: HKLM\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.0\Server HKLM\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.1\Server HKLM\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\SSL 3.0\Server Verify a REG_DWORD value of "1" for "DisabledByDefault". Verify a REG_DWORD value of "0" for "Enabled". If any of the respective registry paths do not exist or are configured with the wrong value, this is a finding. SSL 3.0 is disabled by default in newer Operating Systems. If SSL 3.0 has a registry DWORD enabled with a value of 1, this is a finding. If this key is not present, this is not a finding.

Fix Text (F-20291r1067595_fix)

Access the IIS 10.0 Web Server. Navigate to: HKLM\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.2\Server Create a REG_DWORD named "DisabledByDefault" with a value of "0". Create a REG_DWORD named "Enabled" with a value of "1". Navigate to: HKLM\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.0\Server HKLM\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.1\Server HKLM\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\SSL 3.0\Server For each protocol: Create a REG_DWORD named "DisabledByDefault" with a value of "1". Create a REG_DWORD named "Enabled" with a value of "0".