Riverbed Optimization System (RiOS) must generate unique session identifiers using a FIPS 140-2 approved random number generator.

From Riverbed SteelHead CX v8 NDM Security Technical Implementation Guide

Associated with: CCI-001188

SV-77479r1_rule Riverbed Optimization System (RiOS) must generate unique session identifiers using a FIPS 140-2 approved random number generator.

Vulnerability discussion

Sequentially generated session IDs can be easily guessed by an attacker. Employing the concept of randomness in the generation of unique session identifiers helps to protect against brute-force attacks to determine future session identifiers.Unique session IDs address man-in-the-middle attacks, including session hijacking or insertion of false information into a session. If the attacker is unable to identify or guess the session information related to pending application traffic, they will have more difficulty in hijacking the session or otherwise manipulating valid sessions.This requirement is applicable to devices that use a web interface for device management. Recommended best practice is that the FIPS license be installed and utilized.

Check content

Verify that RiOS is configured to generate unique session identifiers using a FIPS 140-2 approved random number generator. Navigate to the device CLI Type: enable Type: conf t Type: show fips status Verify that "FIPS Mode: Enabled" is displayed on the console If "FIPS Mode: Enabled" is not displayed on the console, this is a finding.

Fix text

Configure RiOS is configured to generate unique session identifiers using a FIPS 140-2 approved random number generator. Navigate to the device CLI Type: enable Type: conf t Type: fips enable Type: write memory Type: reload Type: show fips status Verify that "FIPS Mode: Enabled" is displayed on the screen. Type: exit Type: exit

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