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Re: user guide drafts: "Linux Permissions" and "Manual Pages for Services"

From: Stephen Smalley <sds_at_tycho.nsa.gov>
Date: Wed, 12 Nov 2008 10:31:41 -0500


On Wed, 2008-11-12 at 11:49 +1000, Murray McAllister wrote:
> Hi,
>
> The following are drafts for the "Fixing Problems"[1] section. Any
> comments and corrections are appreciated.
>
> Linux Permissions
>
> When access is denied, check standard Linux permissions. As mentioned in
> Chapter 2, Introduction, most operating systems use a Discretionary
> Access Control (DAC) system to control access, allowing users to control
> the permissions of files that they own. SELinux policy rules are checked
> after DAC rules. SELinux policy rules are not used if DAC rules deny
> access first.
>
> If access is denied and no SELinux denials are logged,

Logically you would also mention the dontaudit case here, and how to check for denials hidden by dontaudit rules.

-- 
Stephen Smalley
National Security Agency


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Received on Wed 12 Nov 2008 - 10:33:10 EST
 

Date Posted: Jan 15, 2009 | Last Modified: Jan 15, 2009 | Last Reviewed: Jan 15, 2009

 
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