V-94291

Discussion

A replay attack may enable an unauthorized user to gain access to the application. Authentication sessions between the authenticator and the application validating the user credentials must not be vulnerable to a replay attack. An authentication process resists replay attacks if it is impractical to achieve a successful authentication by recording and replaying a previous authentication message. A nonprivileged account is any account with the authorizations of a nonprivileged user. Privileged roles are organization-defined roles assigned to individuals that allow those individuals to perform certain security-relevant functions that ordinary users are not authorized to perform. Security-relevant roles include key management, account management, network and system administration, database administration, and web administration. Techniques used to address this include protocols using nonces (e.g., numbers generated for a specific one time use) or challenges (e.g., TLS). Additional techniques include time-synchronous or challenge-response one-time authenticators.

Check Content

Verify that only FIPS-compliant HMAC algorithms are in use.

1. Log on to the ProxySG CLI via SSH.
2. Type "show management services".
3. Verify the "Cipher Suite" attribute lists only cipher suites that use FIPS compliant HMAC algorithms.

If any cipher suites are listed that use non-FIPS-compliant HMAC algorithms, this is a finding.