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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-4694r2_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
SOLARIS 10 SPARC SECURITY TECHNICAL IMPLEMENTATION GUIDE 2018-04-10

Details

Check Text ( C-706r2_chk )
Locate the sendmail.cf configuration file and check for wiz configuration.

Procedure:
# find / -name sendmail.cf -print
# grep -v "^#" |grep -i wiz

If an entry is found for wiz, this is a finding.
Fix Text (F-4622r2_fix)
If the WIZ command is enabled on Sendmail, it should be disabled by adding this line to the sendmail.cf configuration file (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.