Finding ID | Version | Rule ID | IA Controls | Severity |
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V-215300 | AIX7-00-002117 | SV-215300r508663_rule | Medium |
Description |
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X11 forwarding over SSH allows for the secure remote execution of X11-based applications. This feature can increase the attack surface of an SSH connection and should not be enabled unless needed. |
STIG | Date |
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IBM AIX 7.x Security Technical Implementation Guide | 2021-03-10 |
Check Text ( C-16498r294351_chk ) |
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If X11 forwarding has been authorized for use, this is Not Applicable. Check the SSH daemon configuration for the "X11Forwarding" directive using command: # grep -i X11Forwarding /etc/ssh/sshd_config | grep -v '^#' X11Forwarding no If the setting is not present or the setting is "yes", this is a finding. |
Fix Text (F-16496r294352_fix) |
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Edit the "/etc/sshd/sshd_config" file to add the following line and save the change: X11Forwarding no Restart the SSH daemon: # stopsrc -s sshd # startsrc -s sshd |