The VMM must implement replay-resistant authentication mechanisms for network access to nonprivileged accounts.
Overview
Finding ID
Version
Rule ID
IA Controls
Severity
V-207393
SRG-OS-000113-VMM-000570
SV-207393r984213_rule
Medium
Description
A replay attack may enable an unauthorized user to gain access to the VMM. Authentication sessions between the authenticator and the VMM 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 VMM account with authorizations of a non-privileged user.
Techniques used to address this include protocols using nonces (e.g., numbers generated for a specific one-time use) or challenges (e.g., TLS, WS_Security). Additional techniques include time-synchronous or challenge-response one-time authenticators.