Title

The Juniper EX switch must be configured to produce audit records containing information to establish where the events occurred. (Cat II impact)

Discussion

To compile an accurate risk assessment and provide forensic analysis, it is essential for security personnel to know where events occurred, such as device hardware components, device software modules, session identifiers, filenames, host names, and functionality. Associating information about where the event occurred within the network device provides a means of investigating an attack; recognizing resource utilization or capacity thresholds; or identifying an improperly configured device.

Check Content

Determine if the network device is configured to produce audit records containing information to establish where the events occurred. 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 <syslog IPv4 or IPv6 address> { any info; structured-data; <<< Includes 'explicit-priority' and 'time-format' } host <syslog IPv4 or IPv6 address> { any info; explicit-priority; <<< Includes logging facility and severity in standard format } file <file name> { 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 containing information to establish where the events occurred, this is a finding.

Fix Text

Configure the network device to produce audit records containing information to establish where the events occurred. set system syslog host <syslog IPv4 or IPv6 address> any info set system syslog host <syslog IPv4 or IPv6 address> structured-data <<< Includes the 'explicit-priority' and 'time-format year millisecond' directives set system syslog file <file name> any info set system syslog file <file name> structured-data <<< Includes the 'explicit-priority' and 'time-format year millisecond' directives -or- set system syslog host <syslog IPv4 or IPv6 address> any info set system syslog host <syslog IPv4 or IPv6 address> explicit-priority <<< Only if log level and severity are required set system syslog file <file name> any info set system syslog file <file name> explicit-priority <<< Only if log level and severity are required set system syslog time-format year

Additional Identifiers

Rule ID: SV-253891r879565_rule

Vulnerability ID: V-253891

Group Title: SRG-APP-000097-NDM-000227

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.