openssh CIS compliance
* CIS 5.2.1 Ensure permissions on /etc/ssh/sshd_config are configured (Scored)
* CIS 5.2.2 Ensure SSH Protocol is set to 2 (Scored)
* CIS 5.2.3 Ensure SSH LogLevel is set to INFO (Scored)
* CIS 5.2.4 Ensure SSH X11 forwarding is disabled (Scored)
* CIS 5.2.5 Ensure SSH MaxAuthTries is set to 4 or less (Scored)
* CIS 5.2.6 Ensure SSH IgnoreRhosts is enabled (Scored)
* CIS 5.2.7 Ensure SSH HostbasedAuthentication is disabled (Scored)
* CIS 5.2.8 Ensure SSH root login is disabled (Scored)
* CIS 5.2.9 Ensure SSH PermitEmptyPasswords is disabled (Scored)
* CIS 5.2.10 Ensure SSH PermitUserEnvironment is disabled (Scored)
* CIS 5.2.11 Ensure only approved MAC algorithms are used (Scored)
* CIS 5.2.12 Ensure SSH Idle Timeout Interval is configured (Scored)
* CIS 5.2.13 Ensure SSH LoginGraceTime is set to one minute or less (Scored)
* CIS 5.2.14 Ensure SSH access is limited (Scored)
* CIS 5.2.15 Ensure SSH warning banner is configured (Scored)
Change-Id: Ie53dbdfada27bdb08d3571be10e0de95117a1a17
diff --git a/metadata/service/server/cis/cis-5-2-5.yml b/metadata/service/server/cis/cis-5-2-5.yml
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+# 5.2.5 Ensure SSH MaxAuthTries is set to 4 or less (Scored)
+#
+# Profile Applicability
+# ---------------------
+# - Level 1 - Server
+# - Level 1 - Workstation
+#
+# Description
+# -----------
+# The MaxAuthTries parameter specifies the maximum number of authentication attempts
+# permitted per connection. When the login failure count reaches half the number, error
+# messages will be written to the syslog file detailing the login failure.
+#
+# Rationale
+# ----------
+# Setting the MaxAuthTries parameter to a low number will minimize the risk of successful
+# brute force attacks to the SSH server. While the recommended setting is 4, set the number
+# based on site policy.
+#
+# Audit
+# -----
+# Run the following command and verify that output MaxAuthTries is 4 or less:
+#
+# # grep "^MaxAuthTries" /etc/ssh/sshd_config
+# MaxAuthTries 4
+#
+# Remediation
+# -----------
+# Edit the /etc/ssh/sshd_config file to set the parameter as follows:
+#
+# MaxAuthTries 4
+
+parameters:
+ openssh:
+ server:
+ max_auth_tries: 4
+