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DescriptionJan Pazdziora (Red Hat)
2021-11-11 14:18:57 UTC
Description of problem:
The xccdf_org.ssgproject.content_rule_grub2_kernel_trust_cpu_rng rule's oval check is defined as
<criteria operator="OR" >
<criteria operator="AND">
<criterion comment="check if the option is compiled in" test_ref="test_trust_cpu_rng_compiled_in" />
<criterion comment="check if the option is not overridden through a boot parameter" test_ref="test_trust_cpu_rng_boot_param_off" negate="true" />
</criteria>
<criterion comment="check if the option is configured as a boot parameter" test_ref="test_trust_cpu_rng_boot_param_on" />
</criteria>
However, even if test_trust_cpu_rng_boot_param_off fails (and negate="true" makes the criterion pass), the whole rule reports fail because test_trust_cpu_rng_compiled_in does not pass, even if CONFIG_RANDOM_TRUST_CPU is enabled in config.
Version-Release number of selected component (if applicable):
scap-security-guide-0.1.57-5.el9
How reproducible:
Deterministic.
Steps to Reproduce:
1. Check that CONFIG_RANDOM_TRUST_CPU is enabled:
# grep CONFIG_RANDOM_TRUST_CPU=y /boot/config-*
2. Check that it is not overriden anywhere on /boot or /etc:
# grep -r random.trust_cpu /boot /etc
3. Run grub2_kernel_trust_cpu_rng eval:
# oscap xccdf eval --report report.html --profile xccdf_org.ssgproject.content_profile_ospp --rule xccdf_org.ssgproject.content_rule_grub2_kernel_trust_cpu_rng /usr/share/xml/scap/ssg/content/ssg-rhel9-ds.xml
Actual results:
WARNING: Datastream component 'scap_org.open-scap_cref_security-data-oval-com.redhat.rhsa-RHEL9.xml' points out to the remote 'https://www.redhat.com/security/data/oval/com.redhat.rhsa-RHEL9.xml'. Use '--fetch-remote-resources' option to download it.
WARNING: Skipping 'https://www.redhat.com/security/data/oval/com.redhat.rhsa-RHEL9.xml' file which is referenced from datastream
WARNING: Skipping ./security-data-oval-com.redhat.rhsa-RHEL9.xml file which is referenced from XCCDF content
Title Configure kernel to trust the CPU random number generator
Rule xccdf_org.ssgproject.content_rule_grub2_kernel_trust_cpu_rng
Ident CCE-83841-7
Result fail
Expected results:
Result pass
Additional info:
# grep =y /boot/config-5.14.0-11.el9.x86_64 | wc -l
2041
# grep =Y /boot/config-5.14.0-11.el9.x86_64 | wc -l
0
Comment 2Gabriel Gaspar Becker
2021-11-11 14:34:33 UTC
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory (new packages: scap-security-guide), and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://access.redhat.com/errata/RHBA-2022:2610
Description of problem: The xccdf_org.ssgproject.content_rule_grub2_kernel_trust_cpu_rng rule's oval check is defined as <criteria operator="OR" > <criteria operator="AND"> <criterion comment="check if the option is compiled in" test_ref="test_trust_cpu_rng_compiled_in" /> <criterion comment="check if the option is not overridden through a boot parameter" test_ref="test_trust_cpu_rng_boot_param_off" negate="true" /> </criteria> <criterion comment="check if the option is configured as a boot parameter" test_ref="test_trust_cpu_rng_boot_param_on" /> </criteria> However, even if test_trust_cpu_rng_boot_param_off fails (and negate="true" makes the criterion pass), the whole rule reports fail because test_trust_cpu_rng_compiled_in does not pass, even if CONFIG_RANDOM_TRUST_CPU is enabled in config. Version-Release number of selected component (if applicable): scap-security-guide-0.1.57-5.el9 How reproducible: Deterministic. Steps to Reproduce: 1. Check that CONFIG_RANDOM_TRUST_CPU is enabled: # grep CONFIG_RANDOM_TRUST_CPU=y /boot/config-* 2. Check that it is not overriden anywhere on /boot or /etc: # grep -r random.trust_cpu /boot /etc 3. Run grub2_kernel_trust_cpu_rng eval: # oscap xccdf eval --report report.html --profile xccdf_org.ssgproject.content_profile_ospp --rule xccdf_org.ssgproject.content_rule_grub2_kernel_trust_cpu_rng /usr/share/xml/scap/ssg/content/ssg-rhel9-ds.xml Actual results: WARNING: Datastream component 'scap_org.open-scap_cref_security-data-oval-com.redhat.rhsa-RHEL9.xml' points out to the remote 'https://www.redhat.com/security/data/oval/com.redhat.rhsa-RHEL9.xml'. Use '--fetch-remote-resources' option to download it. WARNING: Skipping 'https://www.redhat.com/security/data/oval/com.redhat.rhsa-RHEL9.xml' file which is referenced from datastream WARNING: Skipping ./security-data-oval-com.redhat.rhsa-RHEL9.xml file which is referenced from XCCDF content Title Configure kernel to trust the CPU random number generator Rule xccdf_org.ssgproject.content_rule_grub2_kernel_trust_cpu_rng Ident CCE-83841-7 Result fail Expected results: Result pass Additional info: # grep =y /boot/config-5.14.0-11.el9.x86_64 | wc -l 2041 # grep =Y /boot/config-5.14.0-11.el9.x86_64 | wc -l 0