The Juniper EX switch must be configured to produce audit records that contain information to establish the outcome of the event.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-253893	JUEX-NM-000160	SV-253893r879567_rule		Medium

Description
Without information about the outcome of events, security personnel cannot make an accurate assessment as to whether an attack was successful or if changes were made to the security state of the system. Event outcomes can include indicators of event success or failure and event-specific results (e.g., the security state of the device after the event occurred). As such, they also provide a means to measure the impact of an event and help authorized personnel to determine the appropriate response.

Description

Without information about the outcome of events, security personnel cannot make an accurate assessment as to whether an attack was successful or if changes were made to the security state of the system. Event outcomes can include indicators of event success or failure and event-specific results (e.g., the security state of the device after the event occurred). As such, they also provide a means to measure the impact of an event and help authorized personnel to determine the appropriate response.

STIG	Date
Juniper EX Series Switches Network Device Management Security Technical Implementation Guide	2023-03-23

Details

Check Text ( C-57345r843710_chk )
Determine if the network device is configured to produce audit records that contain information to establish the outcome of the event. Junos standard event log messages are configurable for time format, inclusion of logging facility and severity levels, and format. Setting "structured-data" automatically includes "explicit-priority" and "time-format year millisecond". Verify logging is enabled. [edit system] syslog { host { any info; structured-data; <<< Includes 'explicit-priority' and 'time-format' } host { any info; explicit-priority; <<< Includes logging facility and severity in standard format } file { any info; <<< Uses only standard format } time-format year; <<< Applied only to standard format } Note: In the example, events sent to the first external syslog server include the year and time is expressed in milliseconds. The second syslog server and the file both include the year, but time is expressed in seconds. If the network device does not produce audit records that contain information to establish the outcome of the event, this is a finding.

Check Text ( C-57345r843710_chk )

Determine if the network device is configured to produce audit records that contain information to establish the outcome of the event.

Junos standard event log messages are configurable for time format, inclusion of logging facility and severity levels, and format. Setting "structured-data" automatically includes "explicit-priority" and "time-format year millisecond". Verify logging is enabled.

[edit system]
syslog {
host {
any info;
structured-data; <<< Includes 'explicit-priority' and 'time-format'
}
host {
any info;
explicit-priority; <<< Includes logging facility and severity in standard format
}
file {
any info; <<< Uses only standard format
}
time-format year; <<< Applied only to standard format
}
Note: In the example, events sent to the first external syslog server include the year and time is expressed in milliseconds. The second syslog server and the file both include the year, but time is expressed in seconds.

If the network device does not produce audit records that contain information to establish the outcome of the event, this is a finding.

Fix Text (F-57296r843711_fix)
Configure the network device to produce audit records that contain information to establish the outcome of the event. set system syslog host any info set system syslog host structured-data <<< Includes the 'explicit-priority' and 'time-format year millisecond' directives set system syslog file any info set system syslog file structured-data <<< Includes the 'explicit-priority' and 'time-format year millisecond' directives -or- set system syslog host any info set system syslog host explicit-priority <<< Only if log level and severity are required set system syslog file any info set system syslog file explicit-priority <<< Only if log level and severity are required set system syslog time-format year

Fix Text (F-57296r843711_fix)

Configure the network device to produce audit records that contain information to establish the outcome of the event.

set system syslog host any info
set system syslog host structured-data <<< Includes the 'explicit-priority' and 'time-format year millisecond' directives
set system syslog file any info
set system syslog file structured-data <<< Includes the 'explicit-priority' and 'time-format year millisecond' directives
-or-
set system syslog host any info
set system syslog host explicit-priority <<< Only if log level and severity are required
set system syslog file any info
set system syslog file explicit-priority <<< Only if log level and severity are required
set system syslog time-format year