STIGQter: STIG Summary: Red Hat Enterprise Linux 8 Security Technical Implementation Guide Version: 1 Release: 2 Benchmark Date: 23 Apr 2021:

Successful/unsuccessful uses of the open system call in RHEL 8 must generate an audit record.

DISA Rule

SV-230451r627750_rule

Vulnerability Number

V-230451

Group Title

SRG-OS-000062-GPOS-00031

Rule Version

RHEL-08-030440

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.

Weight

10

Fix Recommendation

Configure the audit system to generate an audit event for any successful/unsuccessful use of the "open" system call by adding or updating the following rules in the "/etc/audit/rules.d/audit.rules" file:

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

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

The audit daemon must be restarted for the changes to take effect.

Check Contents

Verify RHEL 8 generates an audit record when successful/unsuccessful attempts to use the "open" system call by performing the following command to check the file system rules in "/etc/audit/audit.rules":

$ sudo grep -iw open /etc/audit/audit.rules

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

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

If the command does not return all lines, or the lines are commented out, this is a finding.

Vulnerability Number

V-230451

Documentable

False

Rule Version

RHEL-08-030440

Severity Override Guidance

Verify RHEL 8 generates an audit record when successful/unsuccessful attempts to use the "open" system call by performing the following command to check the file system rules in "/etc/audit/audit.rules":

$ sudo grep -iw open /etc/audit/audit.rules

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

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

If the command does not return all lines, or the lines are commented out, this is a finding.

Check Content Reference

M

Target Key

2921

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