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Scoring Audits, Default scoring model

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Scoring Audits When McAfee Policy Auditor performs an audit on a system, it generates information about system compliance that includes a compliance score. The software supports the four scoring models described in the National Institute of Standards and Technology (NIST) document Specification for the Extensible Configuration Checklist Description Format (XCCDF) Version 1.1.4 (http://csrc.nist.gov/publications/nistir/ir7275r3/NISTIR-7275r3.pdf): • Default scoring model • Flat unweighted scoring model • Flat scoring model • Absolute scoring model The software is preconfigured to use a normalized implementation of the flat unweighted score model. You can change the scoring model and the software recalculates scores to reflect the change. Contents Default scoring model Flat unweighted scoring model Flat scoring model Absolute scoring model Changing the scoring model Default scoring model The default scoring model computes the score independently for each collection of subgroups and rules in each group, and again for each rule and group within the audit's benchmark(s). Despite the name of the scoring model, McAfee Policy Auditor does not use this model for its preconfigured scoring model. Instead, the software uses a normalized version of the flat unweighted scoring model that makes it easier to compare audit scores. Calculating scores using the default scoring model The calculated test score under the default scoring model depends upon the number of groups, subgroups, and rules in benchmarks within an audit. This means that audits containing large benchmarks can yield a high score while audits containing small benchmarks can yield a low score. Audits can also have rules that are based on the system configuration, so it is possible, for example, for the same audit to yield one score on an Windows XP system and another score on a Windows 7 system. McAfee Policy Auditor 6.0 software Product Guide for ePolicy Orchestrator 4.6 49

Section	Page
Contents	3
Introducing McAfee Policy Auditor	8
Audience	8
Conventions	8
Finding product documentation	9
Getting started with McAfee Policy Auditor	10
Introduction to compliance audits	10
Auditing systems	11
What's new	11
Software components and what they do	12
Use of ePolicy Orchestrator software features	13
Managed systems vs. unmanaged systems	14
Configuring McAfee Policy Auditor	16
Server settings and what they control	16
Edit McAfee Policy Auditor server settings	18
How permission sets work	18
Default permission sets	19
Edit permission sets	21
Using the McAfee Policy Auditor agent plug-in	22
The agent plug-in and how it works	22
Supported platforms	22
How content is managed	24
Install and uninstall the agent plug-in	24
Install the McAfee Policy Auditor agent plug-in	24
Uninstall the agent plug-in	25
Send a manual wake-up call to a group of systems	25
Display the system tray icon on Windows systems	26
Configuring agentless audits	27
How McAfee Policy Auditor integrates with the McAfee Vulnerability Manager extension	27
Uniform system management	27
McAfee Vulnerability Manager extension integration with scannable systems	28
Asset Discovery scans	28
Data collection scans	28
The Maintain Foundstone Audits server task	28
The Data Import server task	29
Server support	29
Configure McAfee Vulnerability Manager and the ePolicy Orchestrator extension	29
Create a McAfee Vulnerability Manager workgroup	30
Configure the McAfee Vulnerability Manager single sign-on feature	30
Create a data source to synchronize McAfee Vulnerability Manager and ePolicy Orchestrator	31
Register a McAfee Vulnerability Manager database server with McAfee Policy Auditor	32
Manage McAfee Vulnerability Manager credential sets	33
Create an Asset Discovery scan	33
Create an MVM Data Import task	34
Add systems found by McAfee Vulnerability Manager scans to the System Tree	35
Create a Data Collection Scan	35
View McAfee Vulnerability Manager scan status	36
How to handle missing audit results	36
Troubleshoot missing audit results	37
How to handle mismatched McAfee Vulnerability Manager certificates	37
Troubleshoot mismatched McAfee Vulnerability Manager certificates	38
Creating and managing audits	39
Audits and how they work	39
Audit frequency	40
When audits are run	40
Per audit data maintenance	40
Benchmark profiles and their effect on audits	41
Considerations for including systems in an audit	41
Benchmark labels and how they are used	41
Findings	42
Agentless audits	42
Activate benchmarks	42
Create an audit	43
Run an audit manually	43
Disable an audit	44
Delete audits	44
Audit whiteout and blackout periods	44
Set whiteout and blackout periods	44
Service Level Agreements	45
Create, edit, and delete Service Level Agreements	45
How viewing audit results works	46
Exporting audits and audit results	47
Export audits	47
Scoring Audits	49
Default scoring model	49
Flat unweighted scoring model	50
Flat scoring model	50
Absolute scoring model	51
Changing the scoring model	51
Managing Audit Waivers	52
Types of waivers	52
Exception waivers	53
Exemption waivers	53
Suppression waivers	53
Waiver status	54
Filtering waivers by status	54
How start and expiration dates work	54
Examples of filtering waivers by date	54
Filtering waivers by date	55
Filtering waivers by group	55
How waiver requests and grants work	56
Requesting waivers	56
Granting waivers	57
Making waivers expire	57
Deleting waivers	57
File Integrity Monitoring and entitlement reporting	59
How file integrity monitoring works	59
File information monitored	60
File baselines	60
Monitored and excluded files	60
File versioning	61
File version comparison	62
Accept file integrity monitoring events	62
Purge file integrity monitoring events	62
Entitlement reporting	62
Create and apply a file integrity monitoring policy	63
Create a file integrity monitoring policy	63
Apply a policy to systems	65
Compare file versions	65
Accept file integrity monitoring events	66
Purge file integrity monitoring events	66
Create a new file integrity monitoring baseline	67
Query reports for file integrity monitoring	67
Rollup reporting	68
Rollup capabilities	68
Rollup reporting considerations	68
Rollup server tasks	69
Rollup Data - PA: Audit Benchmark Results	69
Rollup Data - PA: Audit Rule Result	70
Rollup Data - PA: Audit Patch Check Result	71
Rollup reports	71
Configure rollup reporting	72
Findings	74
How findings work	74
Types of violations	74
Violation limit	75
Other Findings enhancements	75
Hide or unhide Findings results	75
Dashboards and Queries	77
Policy Auditor default dashboards	77
PA: Compliance Summary dashboard	80
PA: MS Patch Status Summary dashboard	80
PA: Operations	80
PA: PCI Summary	81
Queries as dashboard monitors	82
Policy Auditor agent plug-in debug tool	83
Execute the agent plug-in debug tool	83
Display help	84
Run an audit	84
Run a benchmark	85
Run a check	85
Save debug information	86
Appendix A: Implementing the Security Content Automation Protocol	87
Statement of FDCC compliance	87
Statement of SCAP implementation	88
Statement of CVE implementation	88
Statement of CCE implementation	89
Statement of CPE implementation	89
Statement of CVSS implementation	90
Statement of XCCDF implementation	90
Statement of OVAL implementation	90
Appendix B: Common Criteria requirements	92

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Scoring Audits

When McAfee Policy Auditor performs an audit on a system, it generates information about

system compliance that includes a compliance score.

The software supports the four scoring models described in the National Institute of Standards

and Technology (NIST) document Specification for the Extensible Configuration Checklist

Description Format (XCCDF) Version 1.1.4

(

http://csrc.nist.gov/publications/nistir/ir7275r3/NISTIR-7275r3.pdf

•

Default scoring model

•

Flat unweighted scoring model

•

Flat scoring model

•

Absolute scoring model

The software is preconfigured to use a normalized implementation of the flat unweighted score

model.You can change the scoring model and the software recalculates scores to reflect the

change.

Contents

Default scoring model

Flat unweighted scoring model

Flat scoring model

Absolute scoring model

Changing the scoring model

Default scoring model

The default scoring model computes the score independently for each collection of subgroups

and rules in each group, and again for each rule and group within the audit's benchmark(s).

Despite the name of the scoring model, McAfee Policy Auditor does not use this model for its

preconfigured scoring model. Instead, the software uses a normalized version of the flat

unweighted scoring model that makes it easier to compare audit scores.

Calculating scores using the default scoring model

The calculated test score under the default scoring model depends upon the number of groups,

subgroups, and rules in benchmarks within an audit. This means that audits containing large

benchmarks can yield a high score while audits containing small benchmarks can yield a low

score. Audits can also have rules that are based on the system configuration, so it is possible,

for example, for the same audit to yield one score on an Windows XP system and another score

on a Windows 7 system.

McAfee Policy Auditor 6.0 software Product Guide for ePolicy Orchestrator 4.6