STIGQter: STIG Summary: VMware vSphere 6.7 Photon OS Security Technical Implementation Guide Version: 1 Release: 1 Benchmark Date: 09 Mar 2021:

The Photon operating system must use TCP syncookies.

DISA Rule

SV-239109r675135_rule

Vulnerability Number

V-239109

Group Title

SRG-OS-000142-GPOS-00071

Rule Version

PHTN-67-000037

Severity

CAT II

CCI(s)

• CCI-001095 - The information system manages excess capacity, bandwidth, or other redundancy to limit the effects of information flooding types of denial of service attacks.
• CCI-002385 - The information system protects against or limits the effects of organization-defined types of denial of service attacks by employing organization-defined security safeguards.

Weight

10

Fix Recommendation

At the command line, execute the following commands:

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

Check Contents

At the command line, execute 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-239109

Documentable

False

Rule Version

PHTN-67-000037

Severity Override Guidance

At the command line, execute 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

5323

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