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The HYCU virtual appliance must implement replay-resistant authentication mechanisms for network access to privileged accounts.

Overview

Finding IDVersionRule IDIA ControlsSeverity
V-268260HYCU-ND-000520SV-268260r1038716_ruleCCI-001941medium
Description
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. 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.
STIGDate
HYCU Protege Security Technical Implementation Guide2026-05-23

Related Frameworks

1 mapping across 5 frameworks
SCF0 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (1) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

IAC-02.2Replay-Resistant Authentication
1.00
NIST 800-530 mappings

No source states a mapping between these directly.

Also reachable in 2 hops (78) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

AC-11Device Lock
1.00
AC-11(1)Pattern-hiding Displays
1.00
AC-17(1)Monitoring and Control
1.00
AC-17(10)Authenticate Remote Commands
1.00
AC-17(2)Protection of Confidentiality and Integrity Using Encryption
1.00
AC-2(1)Automated System Account Management
1.00
AC-2(10)Shared and Group Account Credential Change
1.00
AC-2(11)Usage Conditions
1.00
AC-2(2)Automated Temporary and Emergency Account Management
1.00
AC-2(3)Disable Accounts
1.00

+68 more (top 10 by confidence shown)

NIST 800-1710 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (1) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

3.5.4
1.00
CCI1 mapping
CCI-001941
1.00
NIST CSF 2.00 mappings

No source states a mapping between these directly.

Also reachable in 4 hops (1) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

PR.AA-04
1.00

Details

Check Text (C-268260r1038716_chk)

The use of SSH-2 protocol for network/remote access prevents replay attacks. The SSH-2 protocol is the standard for the SSH daemon in the Linux OS used by HYCU. To determine the SSH version in use, log in to the HYCU console and execute the following command: ssh -v localhost If the output does not show remote protocol version 2.0 in use, this is a finding. HYCU web access uses TLS, which addresses this threat. HYCU web access cannot be configured to not use TLS.

Fix Text (F-72184r1038715_fix)

Log in to the HYCU console and configure SSH to use the SSH-2 protocol by editing the protocol variable in the file "/etc/ssh/sshd_config".