SC-23(3): Unique Session Identifiers With Randomization

Control Family:

System And Communications Protection

Parent Control:

SC-23: Session Authenticity

Priority:

P1: Implement P1 security controls first.

CSF v1.1 References:

PR.PT-4

Threats Addressed:

Spoofing
Tampering

Baselines:

(Not part of any baseline)

Next Version:

NIST Special Publication 800-53 Revision 5:
SC-23(3): Unique System-generated Session Identifiers

Control Statement

The information system generates a unique session identifier for each session with [Assignment: organization-defined randomness requirements] and recognizes only session identifiers that are system-generated.

Supplemental Guidance

This control enhancement curtails the ability of adversaries from reusing previously valid session IDs. Employing the concept of randomness in the generation of unique session identifiers helps to protect against brute-force attacks to determine future session identifiers.