Bug 670938

Summary:	searching on auid = -1 results in all events
Product:	Red Hat Enterprise Linux 6	Reporter:	Steve Grubb <sgrubb>
Component:	audit	Assignee:	Steve Grubb <sgrubb>
Status:	CLOSED ERRATA	QA Contact:	BaseOS QE Security Team <qe-baseos-security>
Severity:	medium	Docs Contact:
Priority:	high
Version:	6.0
Target Milestone:	rc
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	audit-2.0.6-1.el6	Doc Type:	Bug Fix
Doc Text:	System processes, that is processes with an audit id (auid) of -1 are logged by the audit subsystem. However, if the ausearch utility was used to locate events where the auid was -1, it would display all events. In this update, ausearch only returns events with an auid of -1.	Story Points:	---
Clone Of:
Clones:	706156 (view as bug list)		Environment:
Last Closed:	2011-05-19 13:55:37 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Bug Depends On:
Bug Blocks:	706156

Description Steve Grubb 2011-01-19 17:31:40 UTC

Description of problem:
When an audit rules such as this is loaded on a 32 bit system:

-a exit,always -S creat -S open -S openat -S truncate -S ftruncate -F success=0 -F auid!=-1

System processes (ones with auid == -1) still get logged. This is because the auid is converted using a signed conversion and then compared in the kernel unsigned. Since 2147483647 does not equal 4294967295, the rule never triggers. Listing the rule back out with "auditctl -l" shows that auid=2147483647 (0x7fffffff) is loaded rather than 4294967295.

Comment 3 Steve Grubb 2011-02-02 13:32:09 UTC

In researching this problem, I found that it was already fixed by https://fedorahosted.org/audit/changeset/268

However during troubleshooting, I needed to get records for auid 4294967295 with ausearch. This resulted in all records rather than the one I wanted. My query was something like this:

ausearch -ul 4294967295 -if ./audit.log

Where audit.log had the following event

type=USER_AUTH msg=audit(1258740386.638:288): user pid=28360 uid=500 auid=500 ses=3 subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 msg='op=PAM:authentication acct="root" exe="/usr/libexec/polkit-1/polkit-agent-helper-1" hostname=? addr=? terminal=? res=failed'

Comment 4 Steve Grubb 2011-02-02 13:33:49 UTC

Fixed by upstream commit:
https://fedorahosted.org/audit/changeset/439

Comment 5 Steve Grubb 2011-02-04 18:55:11 UTC

audit-2.0.6-1.el6 was built to fix this problem.

Comment 11 errata-xmlrpc 2011-05-19 13:55:37 UTC

An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHBA-2011-0653.html