Check: OL08-00-010161
Oracle Linux 8 STIG:
OL08-00-010161
(in versions v1 r10 through v1 r1)
Title
OL 8 must prevent system daemons from using Kerberos for authentication. (Cat II impact)
Discussion
Unapproved mechanisms that are used for authentication to the cryptographic module are not verified and therefore cannot be relied on to provide confidentiality or integrity, and DoD data may be compromised. OL 8 systems using encryption are required to use FIPS-compliant mechanisms for authenticating to cryptographic modules. The key derivation function (KDF) in Kerberos is not FIPS compatible. Ensuring the system does not have any keytab files present prevents system daemons from using Kerberos for authentication. A keytab is a file containing pairs of Kerberos principals and encrypted keys. FIPS 140-2 is the current standard for validating that mechanisms used to access cryptographic modules use authentication that meets DoD requirements. This allows for Security Levels 1, 2, 3, or 4 for use on a general-purpose computing system.
Check Content
Verify that OL 8 prevents system daemons from using Kerberos for authentication. If the system is a server using krb5-server-1.17-18.el8.x86_64 or newer, this requirement is not applicable. If the system is a workstation using krb5-workstation-1.17-18.el8.x86_64 or newer, this requirement is not applicable. Check if there are available keytabs with the following command: $ sudo ls -al /etc/*.keytab If this command produces any file(s), this is a finding.
Fix Text
Configure OL 8 to prevent system daemons from using Kerberos for authentication. Remove any files with the .keytab extension from the operating system.
Additional Identifiers
Rule ID: SV-248545r779201_rule
Vulnerability ID: V-248545
Group Title: SRG-OS-000120-GPOS-00061
Expert Comments
CCIs
Number | Definition |
---|---|
CCI-000803 |
The information system implements mechanisms for authentication to a cryptographic module that meet the requirements of applicable federal laws, Executive Orders, directives, policies, regulations, standards, and guidance for such authentication. |
Controls
Number | Title |
---|---|
IA-7 |
Cryptographic Module Authentication |