CCE-2239-2| Platform: cpe:/o:microsoft:windows_xp | Date: (C)2012-03-13 (M)2023-07-04 |
MSS: (TcpMaxDataRetransmissions) How many times unacknowledged data is retransmitted (3 recommended, 5 is default)
Countermeasure:
Configure the MSS: (TcpMaxDataRetransmissions) How many times unacknowledged data is retransmitted (3 recommended, 5 is default) entry to a value of 3. The possible values for this registry entry are:
? 0 to 0xFFFFFFFF. The default configuration is 5.
In the SCE UI, this setting can be adjusted using a text entry box:
? A user-defined number
? Not Defined
Potential Impact:
TCP starts a retransmission timer when each outbound segment is passed to the IP. If no acknowledgment is received for the data in a given segment before the timer expires, then the segment is retransmitted up to three times.
Parameter:
[3/5]
Technical Mechanism:
(1) GPO: Computer Configuration\\Administrative Templates\\MSS (Legacy)\\MSS: (TcpMaxDataRetransmissions) How many times unacknowledged data is retransmitted (3 recommended, 5 is default)
(2) REG: HKEY_LOCAL_MACHINE\\System\\CurrentControlSet\\Services\\Tcpip\\Parameters!TcpMaxDataRetransmissions
| CCSS Severity: | CCSS Metrics: |
| CCSS Score : 5.9 | Attack Vector: NETWORK |
| Exploit Score: 2.2 | Attack Complexity: HIGH |
| Impact Score: 3.6 | Privileges Required: NONE |
| Severity: MEDIUM | User Interaction: NONE |
| Vector: AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H | Scope: UNCHANGED |
| | Confidentiality: NONE |
| | Integrity: NONE |
| | Availability: HIGH |
| | |
References: | Resource Id | Reference |
|---|
| SCAP Repo OVAL Definition | oval:gov.nist.usgcb.xp:def:126 |
| BITS Shared Assessments SIG v6.0 | BITS Shared Assessments SIG v6.0 |
| Jericho Forum | Jericho Forum |
| HIPAA/HITECH Act | HIPAA/HITECH Act |
| FedRAMP Security Controls(Final Release Jan 2012)--LOW IMPACT LEVEL-- | FedRAMP Security Controls(Final Release Jan 2012)--LOW IMPACT LEVEL-- |
| ISO/IEC 27001-2005 | ISO/IEC 27001-2005 |
| COBIT 4.1 | COBIT 4.1 |
| GAPP (Aug 2009) | GAPP (Aug 2009) |
| NERC CIP | NERC CIP |
| NIST SP800-53 R3 | NIST SP800-53 R3 AC-3 |
| NIST SP800-53 R3 | NIST SP800-53 R3 CM-6 |
| NIST SP800-53 R3 | NIST SP800-53 R3 CM-7 |
| NIST SP800-53 R3 | NIST SP800-53 R3 SC-5 |
| PCIDSS v2.0 | PCIDSS v2.0 |
| FedRAMP Security Controls(Final Release Jan 2012)--MODERATE IMPACT LEVEL-- | FedRAMP Security Controls(Final Release Jan 2012)--MODERATE IMPACT LEVEL-- |
| BITS Shared Assessments AUP v5.0 | BITS Shared Assessments AUP v5.0 |
