The SMTP service log file must not have an extended ACL.

From SUSE Linux Enterprise Server v11 for System z Security Technical Implementation Guide

Associated with: CCI-000225

SV-45862r1_rule The SMTP service log file must not have an extended ACL.

Vulnerability discussion

If the SMTP service log file has an extended ACL, unauthorized users may be allowed to access or to modify the log file.

Check content

# more /etc/rsyslog.conf Examine /etc/rsyslog.conf and determine the log file(s) receiving logs for "mail.crit", "mail.debug", mail.*, or "*.crit". Check the permissions on these log files. # ls -lL If the permissions include a '+', the file has an extended ACL. If the file has an extended ACL and it has not been documented with the IAO, this is a finding.

Fix text

This fix is applicable to both Postfix and sendmail servers. Remove the extended ACL from the file. # setfacl --remove-all

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