STIGQter: STIG Summary: SUSE Linux Enterprise Server 15 Security Technical Implementation Guide Version: 1 Release: 2 Benchmark Date: 23 Apr 2021:

The SUSE operating system must generate audit records for all uses of the openat system call.

DISA Rule

SV-234916r622137_rule

Vulnerability Number

V-234916

Group Title

SRG-OS-000037-GPOS-00015

Rule Version

SLES-15-030170

Severity

CAT II

CCI(s)

• CCI-000169 - The information system provides audit record generation capability for the auditable events defined in AU-2 a. at organization-defined information system components.
• CCI-000172 - The information system generates audit records for the events defined in AU-2 d. with the content defined in AU-3.
• CCI-000130 - The information system generates audit records containing information that establishes what type of event occurred.
• CCI-002884 - The organization audits nonlocal maintenance and diagnostic sessions^ organization-defined audit events.

Weight

10

Fix Recommendation

Configure the SUSE operating system to generate an audit record for all uses of the "openat" system call.

Add or update the following rules to "/etc/audit/rules.d/audit.rules":

-a always,exit -F arch=b32 -S openat -F exit=-EPERM -F auid>=1000 -F auid!=4294967295 -k perm_access
-a always,exit -F arch=b64 -S openat -F exit=-EPERM -F auid>=1000 -F auid!=4294967295 -k perm_access

-a always,exit -F arch=b32 -S openat -F exit=-EACCES -F auid>=1000 -F auid!=4294967295 -k perm_access
-a always,exit -F arch=b64 -S openat -F exit=-EACCES -F auid>=1000 -F auid!=4294967295 -k perm_access

To reload the rules file, restart the audit daemon

> sudo systemctl restart auditd.service

or issue the following command:

> sudo augenrules --load

Check Contents

Verify the SUSE operating system generates an audit record for all uses of the "openat" system call.

Check that the system call is being audited by performing the following command:

> sudo auditctl -l | grep -w 'openat'

-a always,exit -F arch=b32 -S openat -F exit=-EPERM -F auid>=1000 -F auid!=-1 -k perm_access
-a always,exit -F arch=b64 -S openat -F exit=-EPERM -F auid>=1000 -F auid!=-1 -k perm_access

-a always,exit -F arch=b32 -S openat -F exit=-EACCES -F auid>=1000 -F auid!=-1 -k perm_access
-a always,exit -F arch=b64 -S openat -F exit=-EACCES -F auid>=1000 -F auid!=-1 -k perm_access

If both the "b32" and "b64" audit rules are not defined for the "openat" syscall, this is a finding.

If the output does not produce rules containing "-F exit=-EPERM", this is a finding.

If the output does not produce rules containing "-F exit=-EACCES", this is a finding.

Note:
The "-k" allows for specifying an arbitrary identifier. The string following "-k" does not need to match the example output above.

Vulnerability Number

V-234916

Documentable

False

Rule Version

SLES-15-030170

Severity Override Guidance

Verify the SUSE operating system generates an audit record for all uses of the "openat" system call.

Check that the system call is being audited by performing the following command:

> sudo auditctl -l | grep -w 'openat'

-a always,exit -F arch=b32 -S openat -F exit=-EPERM -F auid>=1000 -F auid!=-1 -k perm_access
-a always,exit -F arch=b64 -S openat -F exit=-EPERM -F auid>=1000 -F auid!=-1 -k perm_access

-a always,exit -F arch=b32 -S openat -F exit=-EACCES -F auid>=1000 -F auid!=-1 -k perm_access
-a always,exit -F arch=b64 -S openat -F exit=-EACCES -F auid>=1000 -F auid!=-1 -k perm_access

If both the "b32" and "b64" audit rules are not defined for the "openat" syscall, this is a finding.

If the output does not produce rules containing "-F exit=-EPERM", this is a finding.

If the output does not produce rules containing "-F exit=-EACCES", this is a finding.

Note:
The "-k" allows for specifying an arbitrary identifier. The string following "-k" does not need to match the example output above.

Check Content Reference

M

Target Key

5274

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