Check: ESXI-67-000019
VMware vSphere 6.7 ESXi STIG:
ESXI-67-000019
(in versions v1 r3 through v1 r1)
Title
The ESXi host SSH daemon must not permit Kerberos authentication. (Cat III impact)
Discussion
Kerberos authentication for SSH is often implemented using GSSAPI. If Kerberos is enabled through SSH, the SSH daemon provides a means of access to the system's Kerberos implementation. Vulnerabilities in the system's Kerberos implementation may then be subject to exploitation. To reduce the attack surface of the system, the Kerberos authentication mechanism within SSH must be disabled for systems.
Check Content
From an SSH session connected to the ESXi host, or from the ESXi shell, run the following command: # grep -i "^KerberosAuthentication" /etc/ssh/sshd_config If there is no output or the output is not exactly "KerberosAuthentication no", this is a finding.
Fix Text
From an SSH session connected to the ESXi host, or from the ESXi shell, add or correct the following line in "/etc/ssh/sshd_config": KerberosAuthentication no
Additional Identifiers
Rule ID: SV-239274r674751_rule
Vulnerability ID: V-239274
Group Title: SRG-OS-000480-VMM-002000
Expert Comments
CCIs
Number | Definition |
---|---|
CCI-000366 |
The organization implements the security configuration settings. |
Controls
Number | Title |
---|---|
CM-6 |
Configuration Settings |