Riverbed Optimization System (RiOS) must protect audit information from unauthorized deletion.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-62927	RICX-DM-000063	SV-77417r1_rule		Medium

Description
Audit information includes all information (e.g., audit records, audit settings, and audit reports) needed to successfully audit information system activity. If audit data were to become compromised, then forensic analysis and discovery of the true source of potentially malicious system activity is impossible to achieve. To ensure the veracity of audit data, the network device must protect audit information from unauthorized deletion. This requirement can be achieved through multiple methods, which will depend upon system architecture and design. Some commonly employed methods include: ensuring log files receive the proper file system permissions utilizing file system protections, restricting access, and backing up log data to ensure log data is retained. Network devices providing a user interface to audit data will leverage user permissions and roles identifying the user accessing the data and the corresponding rights the user enjoys in order to make access decisions regarding the deletion of audit data.

Description

Audit information includes all information (e.g., audit records, audit settings, and audit reports) needed to successfully audit information system activity. If audit data were to become compromised, then forensic analysis and discovery of the true source of potentially malicious system activity is impossible to achieve. To ensure the veracity of audit data, the network device must protect audit information from unauthorized deletion. This requirement can be achieved through multiple methods, which will depend upon system architecture and design. Some commonly employed methods include: ensuring log files receive the proper file system permissions utilizing file system protections, restricting access, and backing up log data to ensure log data is retained. Network devices providing a user interface to audit data will leverage user permissions and roles identifying the user accessing the data and the corresponding rights the user enjoys in order to make access decisions regarding the deletion of audit data.

STIG	Date
Riverbed SteelHead CX v8 NDM Security Technical Implementation Guide	2019-10-01

Details

Check Text ( C-63679r1_chk )
Verify that RiOS is configured to protect audit information from unauthorized deletion. Navigate to the device Management Console Navigate to Configure >> Security >> User Permissions Select the "View" icon next to each user name Verify that the Control "Basic Diagnostics" is set according to the authorization level of the user If the control "Basic Diagnostics" is not set according to the authorization level of the user, this is a finding.

Check Text ( C-63679r1_chk )

Verify that RiOS is configured to protect audit information from unauthorized deletion.

Navigate to the device Management Console
Navigate to Configure >> Security >> User Permissions

Select the "View" icon next to each user name
Verify that the Control "Basic Diagnostics" is set according to the authorization level of the user

If the control "Basic Diagnostics" is not set according to the authorization level of the user, this is a finding.

Fix Text (F-68845r1_fix)
Configure RiOS to protect audit information from unauthorized deletion. Navigate to the device Management Console Navigate to Configure >> Security >> User Permissions Select the user name that needs to have modified permissions Set the control "Basic Diagnostics" according to the authorization level of the user Click "Apply" Navigate to the top of the web page and click "Save" to write changes to memory

Fix Text (F-68845r1_fix)

Configure RiOS to protect audit information from unauthorized deletion.

Navigate to the device Management Console
Navigate to Configure >> Security >> User Permissions

Select the user name that needs to have modified permissions
Set the control "Basic Diagnostics" according to the authorization level of the user

Click "Apply"
Navigate to the top of the web page and click "Save" to write changes to memory