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The SMTP service must not have the EXPN feature active.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| GEN004660-ESXI5-PNF | GEN004660-ESXI5-PNF | GEN004660-ESXI5-PNF_rule | Low |
| Description |
|---|
| The SMTP EXPN function allows an attacker to determine if an account exists on a system, providing significant assistance to a brute-force attack on user accounts. EXPN may also provide additional information concerning users on the system, such as the full names of account owners. Applicable, but permanent not-a-finding - The hypervisor does not support this function. |
| STIG | Date |
|---|---|
| VMware ESXi v5 Security Technical Implementation Guide | 2013-01-15 |
Details
| Check Text ( C-GEN004660-ESXI5-PNF_chk ) |
|---|
| ESXi supports this requirement and cannot be configured to be out of compliance. This is a permanent not a finding. |
| Fix Text (F-GEN004660-ESXI5-PNF_fix) |
|---|
| This requirement is permanent not a finding. No fix is required. |