If the AIX host is running an SMTP service, the SMTP greeting must not provide version information.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| low | V-215412 | SRG-OS-000480-GPOS-00227 | AIX7-00-003114 | SV-215412r991589_rule | 2024-08-16 | 3 |
| Description |
|---|
| The version of the SMTP service can be used by attackers to plan an attack based on vulnerabilities present in the specific version. |
| ℹ️ Check |
|---|
| If the AIX host is not running an SMTP service, this is Not Applicable. Check the value of the "SmtpGreetingMessage" parameter in the "sendmail.cf" file: # grep SmtpGreetingMessage /etc/mail/sendmail.cf If the value of the "SmtpGreetingMessage" parameter contains the "$v" or "$Z" macros, this is a finding. |
| ✔️ Fix |
|---|
| Ensure "Sendmail" or its equivalent has been configured to mask the version information. If necessary, change the "O SmtpGreetingMessage" line in the "/etc/sendmail.cf" file from: O SmtpGreetingMessage=$j Sendmail $v/$Z; $b to: O SmtpGreetingMessage= Mail Server Ready ; $b |