[Open-scap] Using the 'STIG ID' value to identify a rule

Tue May 18 07:20:05 UTC 2021

Hi Terry,

>From what I see inside the 'oscap-xccdf.c' functions [1] there is no way
to select anything else than the rule itself. So yes, your team would
need to implement a mapping between the STIG ID and the rule name
outside of the scap-security-guide profile.

Regards,
Alex~

[1] https://github.com/OpenSCAP/openscap/blob/maint-1.3/utils/oscap-xccdf.c

On Mon, May 17, 2021 at 07:39:21PM +0000, Lemons, Terry wrote:
> Internal Use - Confidential
> 
> Hi Alex
> 
> Thanks very much for this informative reply!
> 
> So, am I correct in understanding that it is not possible to select a rule via any mechanism other than the rule's 'Rule ID' value, as in below:
> 
> oscap xccdf eval --rule xccdf_org.ssgproject.content_rule_ftp_present_banner --profile xccdf_org.ssgproject.content_profile_stig /tmp/scap-security-guide-0.1.55/ssg-sle12-ds.xml
> WARNING: Datastream component 'scap_org.open-scap_cref_pub-projects-security-oval-suse.linux.enterprise.12.xml' points out to the remote 'https://ftp.suse.com/pub/projects/security/oval/suse.linux.enterprise.12.xml'. Use '--fetch-remote-resources' option to download it.
> WARNING: Skipping 'https://ftp.suse.com/pub/projects/security/oval/suse.linux.enterprise.12.xml' file which is referenced from datastream
> WARNING: Skipping ./pub-projects-security-oval-suse.linux.enterprise.12.xml file which is referenced from XCCDF content
> Title   Create Warning Banners for All FTP Users
> Rule    xccdf_org.ssgproject.content_rule_ftp_present_banner
> Ident   CCE-83059-6
> Result  pass
> 
> If so, then to meet my team's needs, we'll need to create a manual mapping between the SLES 12 STIG ID values that we know and the OpenSCAP 'Rule ID' value that implements the check and fix for that rule; true?
> 
> Thanks!
> tl
> 
> 
> -----Original Message-----
> From: Alexander Bergmann <abergmann at suse.com> 
> Sent: Monday, May 17, 2021 11:58 AM
> To: Lemons, Terry
> Cc: open-scap-list at redhat.com
> Subject: Re: [Open-scap] Using the 'STIG ID' value to identify a rule
> 
> Hi Terry,
> 
> I haven't checked the code in detail (yet), but as far as I can tell there is now way to select a rule via a present reference.
> 
> The STIG ID is listed as a reference inside the Rule statement itself.
> From the technical point it should be possible to implement such a feature inside OpenSCAP, but I'm not sure if this is desirable. A reference is simply not a clear identifier. Some references will also be used several times in different rules.
> 
> <xccdf-1.2:Rule id="xccdf_org.ssgproject.content_rule_installed_OS_is_vendor_supported" selected="false" severity="high"> ...
>   <xccdf-1.2:reference href="https://public.cyber.mil/stigs/downloads/?_dl_facet_stigs=operating-systems%2Cunix-linux">SLES-12-010000</xccdf-1.2:reference>
> ...
> </xccdf-1.2:Rule>
> 
> From the SCAP point of view, STIG is only one profile of many.
> 
> Maybe one way to explore would be the use of CCEs as a direct rule identifier. We assign CCEs to each STIG requirement 1:1 and they are listed inside the OpenSCAP output.
> 
> Title   The Installed Operating System Is Vendor Supported
> Rule xccdf_org.ssgproject.content_rule_installed_OS_is_vendor_supported
> Ident   CCE-83001-8
> Result  pass
> 
> So may that would be something for a future release.
> 
> 
> Regards,
> Alex~
> 
> On Fri, May 14, 2021 at 05:45:59PM +0000, Lemons, Terry wrote:
> > Internal Use - Confidential
> > 
> > Hi
> > 
> > I recently learned about OpenSCAP, and it seems to fill a need in my team. My team needs to address (close) all of the rules in the SLES 12 STIG on our product. It seems that using oscap, along with the most-recent 'scap-security-guide' (which appears to cover 146 SLES 12 STIG rules), will allow me to see which rules are open ('oscap xccdf eval') and to implement changes to close those rules ('oscap xccdf eval -remediate').
> > 
> > I know that I can use the '-rule' option to specify the name of a single rule to evaluate or remediate.
> > 
> > Our group identifies rules to be fixed, in our work management system and other systems, by the SLES 12 STIG 'STIG ID' value (ex., SLES-12-010000). I tried to use this value in the '-rule' option, and it failed to identify/find that rule.
> > 
> > How can I make oscap operate on a rule identified by 'STIG ID' value (or, even better, on a file containing a list of 'STIG ID' rules?
> > 
> > Thanks!
> > tl
> > 
> > Terry Lemons
> > 
> > [DellEMC_Logo_Hz_Blue_rgb_10percent]
> > Data Management
> > Infrastructure Solutions Group
> > 
> > 176 South Street, MS 2/B-34
> > Hopkinton MA 01748
> > terry.lemons at dell.com<mailto:terry.lemons at dell.com>
> > 
> 
> 
> 
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> 
> 
> --
> Alexander Bergmann <abergmann at suse.com>
> Security Engineer, GPG: E30A 65A4 0F50 0066 B2B5  F614 DE54 E875 9FFA 4886 SUSE Software Solutions Germany GmbH Maxfeldstr. 5, 90409 Nuremberg, Germany (HRB 36809, AG Nürnberg) Managing Director: Felix Imendörffer
> 

-- 
Alexander Bergmann <abergmann at suse.com>
Security Engineer, GPG: E30A 65A4 0F50 0066 B2B5  F614 DE54 E875 9FFA 4886
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nuremberg, Germany
(HRB 36809, AG Nürnberg)
Managing Director: Felix Imendörffer
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