The DNS implementation must generate a unique session identifier for each session.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-34198	SRG-NET-000232-DNS-000139	SV-44674r1_rule		Medium

Description
Unique session IDs are the opposite of sequentially generated session IDs which can be easily guessed by an attacker. Unique session identifiers help to reduce predictability of said identifiers. Employing the concept of randomness in the generation of unique session identifiers helps to protect against 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.

Description

Unique session IDs are the opposite of sequentially generated session IDs which can be easily guessed by an attacker. Unique session identifiers help to reduce predictability of said identifiers. Employing the concept of randomness in the generation of unique session identifiers helps to protect against 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.

STIG	Date
Domain Name System (DNS) Security Requirements Guide	2012-10-24

Details

Check Text ( C-42179r1_chk )
Review the DNS vendor documentation to determine if the DNS generates unique session IDs for each session. If the application or configuration does not generate unique session IDs, this is a finding.

Fix Text (F-38128r1_fix)
Ensure the DNS implementation generates a unique session identifier for each session.