STIGQter: STIG Summary: VMware vSphere 8.0 vCenter Appliance Photon OS 4.0 Security Technical Implementation Guide Version: 1 Release: 1 Benchmark Date: 31 Oct 2023:

The Photon operating system must restrict access to the kernel message buffer.

DISA Rule

SV-258828r933545_rule

Vulnerability Number

V-258828

Group Title

SRG-OS-000138-GPOS-00069

Rule Version

PHTN-40-000067

Severity

CAT II

CCI(s)

• CCI-001090 - Prevent unauthorized and unintended information transfer via shared system resources.

Weight

10

Fix Recommendation

Navigate to and open:

/etc/sysctl.d/zz-stig-hardening.conf

Add or update the following line:

kernel.dmesg_restrict = 1

At the command line, run the following command to load the new configuration:

# /sbin/sysctl --load /etc/sysctl.d/zz-stig-hardening.conf

Note: If the file zz-stig-hardening.conf does not exist, it must be created.

Check Contents

At the command line, run the following command to verify kernel message buffer restrictions are enabled:

# /sbin/sysctl kernel.dmesg_restrict

Example result:

kernel.dmesg_restrict = 1

If the "kernel.dmesg_restrict" kernel parameter is not set to "1", this is a finding.

Vulnerability Number

V-258828

Documentable

False

Rule Version

PHTN-40-000067

Severity Override Guidance

At the command line, run the following command to verify kernel message buffer restrictions are enabled:

# /sbin/sysctl kernel.dmesg_restrict

Example result:

kernel.dmesg_restrict = 1

If the "kernel.dmesg_restrict" kernel parameter is not set to "1", this is a finding.

Check Content Reference

M

Target Key

5569