STIGQter: STIG Summary: VMware vSphere 7.0 vCenter Appliance Photon OS Security Technical Implementation Guide Version: 1 Release: 4 Benchmark Date: 30 Jan 2025:

The Photon operating system must use Transmission Control Protocol (TCP) syncookies.

DISA Rule

SV-256512r958528_rule

Vulnerability Number

V-256512

Group Title

SRG-OS-000142-GPOS-00071

Rule Version

PHTN-30-000036

Severity

CAT II

CCI(s)

• CCI-001095 - Manage capacity, bandwidth, or other redundancy to limit the effects of information flooding types of denial of service attacks.
• CCI-002385 - Protect against or limit the effects of organization-defined types of denial of service events.

Weight

10

Fix Recommendation

At the command line, run the following commands:

# sed -i -e "/^net.ipv4.tcp_syncookies/d" /etc/sysctl.conf
# echo net.ipv4.tcp_syncookies=1>>/etc/sysctl.conf
# /sbin/sysctl --load

Check Contents

At the command line, run the following command:

# /sbin/sysctl -a --pattern tcp_syncookies

Expected result:

net.ipv4.tcp_syncookies = 1

If the output does not match the expected result, this is a finding.

Vulnerability Number

V-256512

Documentable

False

Rule Version

PHTN-30-000036

Severity Override Guidance

At the command line, run the following command:

# /sbin/sysctl -a --pattern tcp_syncookies

Expected result:

net.ipv4.tcp_syncookies = 1

If the output does not match the expected result, this is a finding.

Check Content Reference

M

Target Key

5520