The SSH daemon must ignore .rhosts files.

From VMware vSphere ESXi 6.0 Security Technical Implementation Guide

Associated with: CCI-000767

SV-77683r1_rule The SSH daemon must ignore .rhosts files.

Vulnerability discussion

SSH trust relationships mean a compromise on one host can allow an attacker to move trivially to other hosts.

Check content

To verify how the SSH daemon's "IgnoreRhosts" option is set, run the following command: # grep -i "^IgnoreRhosts" /etc/ssh/sshd_config If there is no output or the output is not exactly "IgnoreRhosts yes", this is a finding.

Fix text

SSH can emulate the behavior of the obsolete rsh command in allowing users to enable insecure access to their accounts via ".rhosts" files. Add or correct the following line in "/etc/ssh/sshd_config": IgnoreRhosts yes

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