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V-56767

The operating system must implement replay-resistant authentication mechanisms for network access to non-privileged accounts.

Finding ID
SRG-OS-000113-GPOS-00058
Rule ID
SV-71027r1_rule
Severity
Cat II
CCE
(None)
Group Title
SRG-OS-000113-GPOS-00058
CCI
CCI-001942
Target Key
(None)
Documentable
No
Discussion

A replay attack may enable an unauthorized user to gain access to the operating system. Authentication sessions between the authenticator and the operating system 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 non-privileged account is any operating system 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.

Fix Text

Configure the operating system to implement replay-resistant authentication mechanisms for network access to non-privileged accounts.

Check Content

Verify the operating system implements replay-resistant authentication mechanisms for network access to non-privileged accounts. If it does not, this is a finding.