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The Sendmail service must not have the wizard backdoor active.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-4694 | GEN004700 | SV-35093r1_rule | ECSC-1 | Low |
| Description |
|---|
| Very old installations of the Sendmail mailing system contained a feature whereby a remote user connecting to the SMTP port can enter the WIZ command and be given an interactive shell with root privileges. |
| STIG | Date |
|---|---|
| HP-UX 11.31 Security Technical Implementation Guide | 2018-03-01 |
Details
| Check Text ( C-36577r1_chk ) |
|---|
| Check the /etc/mail/sendmail.cf configuration file for "wiz" configuration. # cat /etc/mail/sendmail.cf |tr '\011' ' ' | tr -s ' ' | sed -e 's/^[ \t]*//' | grep -v "^#" |\ grep -i wiz If an entry is found for wiz, this is a finding. |
| Fix Text (F-31945r1_fix) |
|---|
| If the WIZ command is enabled on Sendmail, it should be disabled by adding this line to the sendmail.cf configuration file (note that it must be typed in uppercase): OW* For the change to take effect, kill the Sendmail process, refreeze the sendmail.cf file, and restart the Sendmail process. |