STIGQter 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 fchmod system call in RHEL 8 must generate an audit record.

DISA Rule

SV-230461r627750_rule

Vulnerability Number

V-230461

Group Title

SRG-OS-000062-GPOS-00031

Rule Version

RHEL-08-030540

Severity

CAT II

CCI(s)

Weight

10

Fix Recommendation

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

-a always,exit -F arch=b32 -S fchmod -F auid>=1000 -F auid!=unset -k perm_mod
-a always,exit -F arch=b64 -S fchmod -F auid>=1000 -F auid!=unset -k perm_mod

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 "fchmod" system call by performing the following command to check the file system rules in "/etc/audit/audit.rules":

$ sudo grep -w fchmod /etc/audit/audit.rules

-a always,exit -F arch=b32 -S fchmod -F auid>=1000 -F auid!=unset -k perm_mod
-a always,exit -F arch=b64 -S fchmod -F auid>=1000 -F auid!=unset -k perm_mod

If the command does not return a line, or the line is commented out, this is a finding.

Vulnerability Number

V-230461

Documentable

False

Rule Version

RHEL-08-030540

Severity Override Guidance

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

$ sudo grep -w fchmod /etc/audit/audit.rules

-a always,exit -F arch=b32 -S fchmod -F auid>=1000 -F auid!=unset -k perm_mod
-a always,exit -F arch=b64 -S fchmod -F auid>=1000 -F auid!=unset -k perm_mod

If the command does not return a line, or the line is commented out, this is a finding.

Check Content Reference

M

Target Key

2921

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