STIGQter: STIG Summary: VMware vSphere 7.0 ESXi Security Technical Implementation Guide Version: 1 Release: 4 Benchmark Date: 02 Apr 2025:

The ESXi host Secure Shell (SSH) daemon must set a timeout count on idle sessions.

DISA Rule

SV-256394r959010_rule

Vulnerability Number

V-256394

Group Title

SRG-OS-000480-VMM-002000

Rule Version

ESXI-70-000026

Severity

CAT III

CCI(s)

• CCI-000366 - Implement the security configuration settings.

Weight

10

Fix Recommendation

From an ESXi shell, add or correct the following line in "/etc/ssh/sshd_config":

ClientAliveCountMax 3

Check Contents

From an ESXi shell, run the following command:

# /usr/lib/vmware/openssh/bin/sshd -T|grep clientalivecountmax

Expected result:

clientalivecountmax 3

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

Vulnerability Number

V-256394

Documentable

False

Rule Version

ESXI-70-000026

Severity Override Guidance

From an ESXi shell, run the following command:

# /usr/lib/vmware/openssh/bin/sshd -T|grep clientalivecountmax

Expected result:

clientalivecountmax 3

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

Check Content Reference

M

Target Key

5518