Title

The ALG must generate unique session identifiers using a FIPS 140-2 approved random number generator. (Cat II impact)

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. This requirement is applicable to ALGs that create and use sessions and session identifiers to control user communications. If an attacker can guess the session identifier, or can inject or manually insert session information, the valid user's application session can be compromised.

Check Content

Verify the ALG generates unique session identifiers using a FIPS 140-2 approved random number generator. If the ALG does not generate unique session identifiers using a FIPS 140-2 approved random number generator, this is a finding.

Fix Text

Configure ALG to generate unique session identifiers using a FIPS 140-2 approved random number generator.

Additional Identifiers

Rule ID: SV-68867r1_rule

Vulnerability ID: V-54621

Group Title: SRG-NET-000234-ALG-000116

Expert Comments

CCIs tied to check.

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