CCE-99731-2| Platform: cpe:/o:microsoft:windows_server_2019 | Date: (C)2022-07-28 (M)2023-07-04 |
The registry value entry TCPMaxDataRetransmissions for IPv6 was added to the template file in the HKEY_LOCAL_MACHINESystemCurrentControlSetServicesTcpip6
Parameters registry key. The entry appears as MSS: (TcpMaxDataRetransmissions) IPv6 How many times unacknowledged data is retransmitted (3 recommended, 5 is default) in the SCE.
This setting controls the number of times that TCP retransmits an individual data segment (non-connect segment) before the connection is aborted. The retransmission time-out is doubled with each successive retransmission on a connection. It is reset when responses resume. The base time-out value is dynamically determined by the measured round-trip time on the connection.
Parameter:
[3_times/5_times]
Technical Mechanism:
(1) GPO: Computer Configuration\Windows Settings\Security Settings\Local Policies\Security Options!MSS: (TcpMaxDataRetransmissions IPv6) How many times unacknowledged data is retransmitted (3 recommended, 5 is default)
(2) REG: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Tcpip6\Parameters!TcpMaxDataRetransmissions
| CCSS Severity: | CCSS Metrics: |
| CCSS Score : 8.2 | Attack Vector: NETWORK |
| Exploit Score: 3.9 | Attack Complexity: LOW |
| Impact Score: 4.2 | Privileges Required: NONE |
| Severity: HIGH | User Interaction: NONE |
| Vector: AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H | Scope: UNCHANGED |
| | Confidentiality: NONE |
| | Integrity: LOW |
| | Availability: HIGH |
| | |
References: | Resource Id | Reference |
|---|
| SCAP Repo OVAL Definition | oval:org.secpod.oval:def:82035 |
