Finding ID | Version | Rule ID | IA Controls | Severity |
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V-39285 | GEN005539-ESXI5-000113 | SV-51101r1_rule | Medium |
Description |
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If compression is allowed in an SSH connection prior to authentication, vulnerabilities in the compression software could result in compromise of the system from an unauthenticated connection, potentially with root privileges. |
STIG | Date |
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VMware ESXi Server 5.0 Security Technical Implementation Guide | 2013-09-12 |
Check Text ( C-46549r1_chk ) |
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Disable lock down mode. Enable the ESXi Shell. Login as root and execute the following command(s): # grep Compression /etc/ssh/sshd_config If the "Compression" is set to "yes" or "delayed", or the keyword/line is missing, this is a finding. Re-enable lock down mode. |
Fix Text (F-44264r1_fix) |
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Disable lock down mode. Enable the ESXi Shell. Login as root and execute the following command(s): # vi /etc/ssh/sshd_config Add/modify the "Compression" keyword to "no", i.e.; Compression=no Re-enable lock down mode. |