ESXI-67-000028 - The ESXi host SSH daemon must limit connections to a single session.

Information

The SSH protocol has the ability to provide multiple sessions over a single connection without reauthentication. A compromised client could use this feature to establish additional sessions to a system without consent or knowledge of the user.

Solution

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':

MaxSessions 1

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_VMW_vSphere_6-7_Y22M04_STIG.zip

Item Details

Category: CONFIGURATION MANAGEMENT

References: 800-53|CM-6b., CAT|II, CCI|CCI-000366, Rule-ID|SV-239283r674778_rule, STIG-ID|ESXI-67-000028, Vuln-ID|V-239283

Plugin: Unix

Control ID: ed4e4baaa93db60b05cf69d99df5451301dfc6ed93a5e97f8a762d106eda86e7