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Bug 1547642 - OVAL check for content_rule_bootloader_audit_argument uses wrong file
Summary: OVAL check for content_rule_bootloader_audit_argument uses wrong file
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: scap-security-guide
Version: 7.5
Hardware: x86_64
OS: Linux
medium
medium
Target Milestone: rc
: ---
Assignee: Vojtech Polasek
QA Contact: Gabriel Gaspar Becker
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2018-02-21 16:32 UTC by Matt Micene
Modified: 2020-11-14 07:30 UTC (History)
5 users (show)

Fixed In Version: scap-security-guide-0.1.49-1.el7
Doc Type: No Doc Update
Doc Text:
Clone Of:
Environment:
Last Closed: 2020-09-29 19:52:12 UTC
Target Upstream Version:
Embargoed:
lcervako: mirror+

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2020:3909 0 None None None 2020-09-29 19:52:34 UTC

Description Matt Micene 2018-02-21 16:32:51 UTC 
Description of problem:
The remediations for content_rule_bootloader_audit_argument use grubby to update the kernel command line to enable auditing prior to audit daemon start up.

The OVAL check looks for the "audit=1" argument in /etc/default/grub.

grubby adds the argument to /boot/grub2/grub.cg on an x86_64 BIOS based system.

Version-Release number of selected component (if applicable):
scap-security-guide-0.1.36-7.el7.noarch
grubby-8.28-23.el7.x86_64

How reproducible:
Always

Steps to Reproduce:
1.  Apply bash or ansible remediation to system
2.  Scan with C2S profile that has check enabled
3.

Actual results:
"Enable Auditing for Processes Which Start Prior to the Audit Daemon" marked as failed

Expected results:
"Enable Auditing for Processes Which Start Prior to the Audit Daemon" passes

Additional info:

I don't know if this is a recent behavior change for grubby but the man page on a RHEL 7.5 Beta system shows the following defaults for grub2 config files.

These defaults are listed in the table below.

         ┌────────────────┬────────────┬─────────────────────────────────┐
         │ Arch           │ Bootloader │ Configuration File              │
         ├────────────────┼────────────┼─────────────────────────────────┤
         │ x86_64 [BIOS]  │ grub2      │ /boot/grub2/grub.cfg            │
         ├────────────────┼────────────┼─────────────────────────────────┤
         │ x86_64 [UEFI]  │ grub2      │ /boot/efi/EFI/redhat/grub.cfg   │

The description and warnings (edit /etc/default/grub and rebuild grub.cfg with grub-mkconfig ) match the OVAL expectations, but not what the remediations do.
Comment 2 Matěj Týč 2018-11-29 14:48:50 UTC 
Check of this rule seem to be correct only in RHEL6. In RHEL7, grubby is used to generate grub.cfg, and it doesn't interact with the /etc/default/grub file at all.
Therefore, this rule needs to be fixed for RHEL>=7
Comment 5 Vojtech Polasek 2019-08-26 08:04:10 UTC 
I will fix this.
Comment 6 Watson Yuuma Sato 2019-09-16 12:43:47 UTC 
https://github.com/ComplianceAsCode/content/pull/4786
Comment 11 Gabriel Gaspar Becker 2020-03-31 14:11:59 UTC 
Verified for: scap-security-guide-0.1.49-1.el7.noarch
Comment 13 errata-xmlrpc 2020-09-29 19:52:12 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 (scap-security-guide bug fix and enhancement update), 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-2020:3909
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