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 open_by_handle_at system call.

DISA Rule

SV-234917r622137_rule

Vulnerability Number

V-234917

Group Title

SRG-OS-000037-GPOS-00015

Rule Version

SLES-15-030180

Severity

CAT II

CCI(s)

• CCI-000130 - The information system generates audit records containing information that establishes what type of event occurred.
• CCI-000172 - The information system generates audit records for the events defined in AU-2 d. with the content defined in AU-3.
• 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-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 "open_by_handle_at" system call.

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

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

-a always,exit -F arch=b32 -S open_by_handle_at -F exit=-EACCES -F auid>=1000 -F auid!=4294967295 -k perm_access
-a always,exit -F arch=b64 -S open_by_handle_at -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 "open_by_handle_at" system call.

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

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

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

-a always,exit -F arch=b32 -S open_by_handle_at -F exit=-EACCES -F auid>=1000 -F auid!=-1 -k perm_access
-a always,exit -F arch=b64 -S open_by_handle_at -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 "open_by_handle_at" 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-234917

Documentable

False

Rule Version

SLES-15-030180

Severity Override Guidance

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

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

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

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

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