The SSH daemon must perform strict mode checking of home directory configuration files.

From VMware ESXi Server 5.0 Security Technical Implementation Guide

Associated with: CCI-000366

SV-51278r2_rule The SSH daemon must perform strict mode checking of home directory configuration files.

Vulnerability discussion

If other users have access to modify user-specific SSH configuration files, they may be able to log into the system as another user.

Check content

Disable lock down mode. Enable the ESXi Shell. Execute the following command(s): # grep StrictModes /etc/ssh/sshd_config If the command returns nothing, or the returned "StrictModes" attribute is set to "no", this is a finding. Re-enable lock down mode.

Fix text

Disable lock down mode. Enable the ESXi Shell. Execute the following command(s): # vi /etc/ssh/sshd_config Add/modify the attribute line entry to the following (quotes for emphasis only): "StrictModes yes" Re-enable lock down mode.

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