The A10 Networks ADC must generate alerts to the administrators and ISSO when accounts are modified.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-68063	AADC-NM-000079	SV-82553r1_rule		Medium

Description
Once an attacker establishes initial access to a system, the attacker often attempts to create a persistent method of reestablishing access. One way to accomplish this is for the attacker to simply modify an existing account. Notification of account modification is one method for mitigating this risk. A comprehensive account management process will ensure an audit trail which documents the modification of device administrator accounts and notifies administrators and Information System Security Officers (ISSO). Such a process greatly reduces the risk that accounts will be surreptitiously modified and provides logging that can be used for forensic purposes. The A10 Networks ADC records in the audit log when an account is modified. This appears as the command that created the account and contains the keyword "admin". These messages must be forwarded to the ISSO and administrators. Configuring the device to forward all audit log messages to an actively monitored syslog server or SNMP management station meets this requirement.

Description

Once an attacker establishes initial access to a system, the attacker often attempts to create a persistent method of reestablishing access. One way to accomplish this is for the attacker to simply modify an existing account. Notification of account modification is one method for mitigating this risk. A comprehensive account management process will ensure an audit trail which documents the modification of device administrator accounts and notifies administrators and Information System Security Officers (ISSO). Such a process greatly reduces the risk that accounts will be surreptitiously modified and provides logging that can be used for forensic purposes. The A10 Networks ADC records in the audit log when an account is modified. This appears as the command that created the account and contains the keyword "admin". These messages must be forwarded to the ISSO and administrators. Configuring the device to forward all audit log messages to an actively monitored syslog server or SNMP management station meets this requirement.

STIG	Date
A10 Networks ADC NDM Security Technical Implementation Guide	2016-04-15

Details

Check Text ( C-68623r1_chk )
The A10 Networks ADC records in the audit log when an account is modified. This appears as the command that created the account and contains the keyword "admin". These messages must be forwarded to the ISSO and administrators. This is met by sending audit log messages to the Syslog servers or SNMP management station which is continuously monitored. Review the device configuration. The following command shows the portion of the device configuration that includes the word "host". show run \| inc host If the output does not display the "logging host" and "logging auditlog host" commands (no log targets are configured), this is a finding. The following command shows the logging policy: show log policy If Syslog logging is disabled, this is a finding.

Check Text ( C-68623r1_chk )

The A10 Networks ADC records in the audit log when an account is modified. This appears as the command that created the account and contains the keyword "admin". These messages must be forwarded to the ISSO and administrators. This is met by sending audit log messages to the Syslog servers or SNMP management station which is continuously monitored.

Review the device configuration.

The following command shows the portion of the device configuration that includes the word "host".
show run | inc host

If the output does not display the "logging host" and "logging auditlog host" commands (no log targets are configured), this is a finding.

The following command shows the logging policy:
show log policy

If Syslog logging is disabled, this is a finding.

Fix Text (F-74179r1_fix)
The following command specifies the severity levels of event messages to send to a Syslog server: logging syslog [severity-level] The following command specifies a Syslog server to which to send event messages: logging host ipaddr [ipaddr...][port protocol-port] "ipaddr" is the IP address of the Syslog server. IP addresses can be entered for up to 10 remote logging Syslog servers. "protocolport" is the port number to which to send messages. Only one protocol port can be specified with the command. All servers must use the same port to listen for syslog messages. Since the Audit log is separate from the Event log, it must have its own target to write messages to: logging auditlog host [ipaddr \| hostname][facility facility-name] "ipaddr \| hostname" is the IP address or hostname of the server. "facility-name" is the name of a log facility.

Fix Text (F-74179r1_fix)

The following command specifies the severity levels of event messages to send to a Syslog server:
logging syslog [severity-level]

The following command specifies a Syslog server to which to send event messages:
logging host ipaddr [ipaddr...][port protocol-port]
"ipaddr" is the IP address of the Syslog server. IP addresses can be entered for up to 10 remote logging Syslog servers.
"protocolport" is the port number to which to send messages. Only one protocol port can be specified with the command. All servers must use the same port to listen for syslog messages.

Since the Audit log is separate from the Event log, it must have its own target to write messages to:
logging auditlog host [ipaddr | hostname][facility facility-name]
"ipaddr | hostname" is the IP address or hostname of the server.
"facility-name" is the name of a log facility.